JPH11345110A - Information processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce access to a video RAM accompanied with by change of a display content, and to quickly change a display screen by exchanging the addresses of two rectangular areas on the video RAM. SOLUTION: An address conversion circuit 0102 performs address conversion by referring to the contents of an address conversion data base 0101. The contents of the address conversion data base 0101 can be rewritten making reference to an address bus 9905 and a data bus 9907 by a CPU 9901 or the like. Also, the correspondence of the address supplied by the CPU 9901 or a display control part 9909 before being converted by the address conversion circuit 0102 with a display coordinate follows a memory map. At exchanging of the addresses of two rectangular areas which are not equipped with any common part for address conversion, the CPU 9901 writes the contents in the address conversion data base 0101, and the address conversion circuit 0102 calculates the output address from an input address.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus for performing graphic display.

[0002]

2. Description of the Related Art As a conventional information processing apparatus, there is, for example, an apparatus disclosed in Japanese Patent Application Laid-Open No. 63-285592. This device has a configuration as shown in FIG. CPU_9901 stores data input from data input device such as keyboard_9902 in memory_
Processing is performed according to the drawing processing routine stored in 9903. The CPU_9901 sets the writing position of the drawing data to the video RAM_9904 by using the address bus_9905 and the address selector_99.
The data is written via the data bus_9907 and the data selector_9908 while being designated by 06.

In parallel with the writing of data to the video RAM_9904 by the CPU_9901, the display control unit_9909 performs display reading. That is, the display control unit_9909
Synchronizes the built-in address counter in synchronization with the investigation clock signal generated by the built-in clock generation circuit, and transfers this to the video RAM via the address selector _9906.
Supply to _9904. The data read from the video RAM_9904 sequentially and periodically according to the step address is supplied to the display_9910 via the display control unit.

[0004] Therefore, contention for access to the video RAM_9904 occurs between the writing of random display data by the CPU_9901 and the reading of display data by the display control unit_9909. In order to resolve this conflict, the display control unit_9909 refers to the display timing generated by the built-in clock, the read address of the display control unit_9909 and the drawing position from the CPU_9901, and notifies the CPU_9901 of the timing when there is no access conflict with the video RAM_9904. I do.

[0005]

In recent years, display devices have been increased in screen size and multiple screens, and the amount of display data has been increasing. Further, with the development of the graphical user interface, the frequency of rewriting rectangular portions in the display screen, such as animation display and multi-window display, has been increasing. For this reason, in the above-described information processing apparatus in which the display data needs to be rewritten every time to change the display content, it takes a long time to rewrite the display screen. Especially,
Animation, scrolling, panning, and the like, which require a smooth change in the screen, require a large amount of data to be rewritten in a short period of time, and there is a problem that these processes take a long time and work efficiency is reduced.

[0006]

An information processing apparatus according to the present invention comprises a video RAM, a drawing means for writing display data in the video RAM, and the contents of the video RAM sequentially and periodically read and supplied to a display device. In addition to an existing element called a display control unit, the display control unit includes an address conversion circuit for converting an address to be supplied to a video RAM and an address conversion database for holding an address conversion rule.

With this address conversion circuit, a video RAM
By swapping the addresses of the upper two rectangular areas,
Change the display position without rewriting the contents of the video RAM. This makes it possible to reduce the number of accesses to the video RAM due to the change of the display content, and to quickly change the display screen.

[0008]

1 to 7 show an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a block diagram showing the configuration of an information processing apparatus according to an embodiment of the present invention, FIG. 2 is a memory map showing the correspondence between VRAM addresses and display coordinates, FIG. 3 is an explanatory diagram of two rectangular areas to be exchanged, FIG. 4 is a database used for exchanging rectangular areas, FIG. 5 is a flowchart of coordinate conversion,
FIG. 6 is a diagram showing the correspondence between addresses and coordinates when address conversion is not performed, and FIG. 7 is a diagram showing the correspondence between addresses and coordinates after address conversion.

In FIG. 1, parts that are the same as or correspond to those in FIG. 99 are denoted by the same reference numerals. Accordingly, the configuration of a portion different from that of FIG. 99 will be described. Reference numeral 9904 denotes a video RAM which is a display readable and writable memory;
The address signal from the 9907 or the display control unit_9909 is passed through the address selector 9906, and then the address conversion circuit_010
Connected to be supplied via 2.

The address conversion circuit_0102 performs address conversion with reference to the address conversion database_0101. The contents of the address conversion database_0101 can be rewritten by the CPU_9901 or the like via the address bus_9905 and the data bus 9907. The address conversion circuit_0102 is supplied by the CPU_9901 and the display control unit_9909.
The correspondence between the address before the conversion and the display coordinates follows the memory map shown in FIG. In other words, one address is assigned per pixel, and the display start address is set to SA
The width of the display is W pixels, the height is H pixels, the upper left corner of the display is the origin (0,0), the x coordinate is to the right, and the y coordinate is down. At this time, the address of the pixel moved one pixel to the right from a certain pixel is obtained by adding one to the address of the original pixel. Also, the address of the pixel moved one pixel down is changed to the address of the original pixel.
W is added. Therefore, the address A of the pixel at the coordinates (x, y) can be easily obtained according to the equation (1).

A = SA + x + (W * y) (1) For example, the address of (0,0) is SA, and the address of (W-1,0) is
The address of SA + W-1, (W-1, H-1) is SA + (W-1) + W * (H-
1) = SA + W * H-1

Conversely, the only coordinate (x, y) corresponding from the address A can be obtained from the following equations (2) and (3).

X = (A-SA)% W (2) y = (A-SA) / W (3) x is the remainder of A-SA divided by W, and y is A-SA Divided by W.

The display control unit _9909 for reading display data from the video RAM_9904 having such a configuration is operated by SA to SA + H.
Addresses up to * W-1 are periodically generated sequentially, the contents of the video RAM_9904 at that address are read, and a display signal is supplied to the display_9910 for display. C
PU_9901 follows the drawing routine stored in memory_9903. The display screen is changed by writing to the address between address SA and SA + H * W-1. These CPU_990
1. The address conversion circuit _0102 converts the address generated by the display control unit _9909 and supplies it to the video RAM_9907.

The conversion of the address is as shown in FIG.
When swapping two rectangles P and Q that do not have a common part, CPU_9901 stores the address translation database_0101 in FIG.
The address conversion circuit_0102 calculates the output address AOUT from the input address AIN according to the flowchart shown in FIG. The rectangle P shown in FIG. 3 is a rectangle having a width pqw and a height pqh, where the coordinates of the upper left corner are (px, py),
The rectangle Q has the coordinates of the upper left corner as (qx, qy), width pqw, height pq
h is a rectangle. The contents of the address conversion database shown in FIG. 4 include the display start address SA, display screen size (width W,
Height H) and the positions of the two rectangles to be exchanged (the coordinates of the upper left corner of the rectangle P (px, py) and the coordinates of the upper left corner of the rectangle Q (qx, q
y)), the size of the rectangle to be exchanged (width pqw, height pqh) and a flag F indicating whether or not to exchange the addresses of the two rectangles.

The address conversion circuit _0102 refers to the contents of the coordinate conversion database _0101 when the flag F indicates conversion, and changes the input address AIN to the output address AOU.
Convert to T. The procedure of the address conversion will be described with reference to the flowchart shown in FIG. First, step_0501
In the above, the coordinates corresponding to the input address AIN are calculated using the equations (2) and (3). Next, in Step_0502, it is determined which area on the video RAM contains the coordinates calculated in Step_0501. If it is included in the rectangular area P, that is, if the equation (4) is satisfied, the process proceeds to step_0503 to calculate AOUT according to the equation (5).

(Px ≦ x <px + pqw) and (py ≦ y <py + pqh) ・ ・ ・ (4) AOUT = AIN + [(qx-px) + (qy-py) * W] ・ ・ ・ ( 5) The second term of this equation (5) + [(qx-px) + (qy-py) * W] is the amount of address change when moving from rectangle P to rectangle Q.
The contents of the rectangle P can be moved to the position of the rectangle Q only by performing the address conversion according to the equation (5).

Also, in step_0502, step_
When the coordinates calculated in 0501 are included in the rectangular area Q, that is, when Expression (6) is satisfied, the process proceeds to step _0504.
Is calculated according to the following equation (7).

(Qx ≦ x <qx + pqw) and (qy ≦ y <qy + pqh) (6) AOUT = AIN-[(qx-px) + (qy-py) * W] (7) The second term of this equation (7),-[(qx-px) + (qy-py) * W], is the amount of address change when moving from rectangle Q to rectangle P.
The contents of the rectangle Q can be moved to the position of the rectangle P only by performing the address conversion according to the equation (7).

In addition, in Step_0502, when the coordinates calculated in Step_0501 are not included in the rectangular areas P and Q, that is, when both Equations (4) and (6) do not hold, the process proceeds to Step_0505. AOUT is calculated according to the following equation (8).

AOUT = AIN (8) As described above, the position of the rectangle P and the rectangle Q can be exchanged by calculating AOUT by any one of the steps _0503,0504 and 0505.

Next, as an example, the display start address SA = 00,
When displaying with display width W = 5 and display height H = 5, the upper left corner coordinates (0,2), width 2, height 2 rectangle and upper left corner coordinates (3,0), width 2. Operations of the conventional information processing apparatus and the information processing apparatus of the present invention in the case of replacing a rectangle having a height of 2 will be described.

In the conventional information processing apparatus as shown in FIG.
U_9901 reads two rectangles of data, then swaps their addresses and writes two rectangles of data. The correspondence between addresses and coordinates when performing such a display is expressed by the formula
FIG. 6 is obtained from (1), (2), and (3). Reading and writing of data when exchanging two rectangles are performed, for example, in the following procedure.

(1) The data at address 03 is read. (2) Read the data at address 15 and write the data to address 03. (3) Transfer the data read from address 03 to address 15
Write to. (4) Read the data at address 04. (5) Read the data at address 16 and write the data to address 04. (6) Transfer the data read from address 04 to address 16
Write to. (7) Read the data at address 08. (8) Read the data at address 20 and write the data to address 08. (9) Read the data read from address 08 to address 20
Write to. (10) Read the data at address 09. (11) Read the data at address 21 and write the data to address 09. (12) Read the data read from address 09 to address 21
Write to.

As described above, in the conventional information processing apparatus, the CPU_99
Read 8 pixels of video RAM from 01 and 8
Writes to the video RAM for pixels occur. this,
The number of video RAM read / writes increases as the size of the rectangle to be replaced increases.

On the other hand, in the information processing apparatus of the present invention,
CPU_9901 only rewrites a small address conversion database and the address conversion circuit _0102 performs address conversion and determines the correspondence between addresses and coordinates. Figure 6 The address conversion shown in Figure 7 based on the correspondence between addresses and coordinates when address conversion is not performed. Change to the correspondence between the later address and coordinates.

The contents of the address conversion database are rectangle P
Is the rectangle in the upper left corner (0,3), width 2 and height 2, rectangle Q
If is a rectangle with coordinates (3,0) in the upper left corner, width 2 and height 2, then:

(1) Display start address = 00 (2) Display width = 5 (3) Display height = 5 (4) Coordinate of upper left corner of rectangle P = (0,3) (5) Upper left corner of rectangle Q (3,0) (6) Width of rectangle to be exchanged = 2 (7) Height of rectangle to be exchanged = 2 (8) Address conversion flag = Perform conversion At this time, input to address conversion circuit_0102 Address is 00
Then, in Step_0501, the coordinates corresponding to the address 00 are obtained as (0, 0). Since (0,0) is not included in the rectangular areas P and Q, it is determined in step _0502 that step _0505
To calculate the output address. As a result, the output address is obtained as 00. When the input address is 01 or 02, the process similarly proceeds to step_0505, and the output address becomes 01 or 02. If the input address is 03, it is included in the rectangular area Q, so go to step _0504 and the output address is calculated by equation (7)
Therefore, AOUT = 03-[(3-0) + (0-3) * 5] = 15 is obtained, which is 15. Similarly, an output address when an address from 4 to 24 is input is calculated, and when the address is written to the coordinate corresponding to the address before input, the correspondence between the coordinate after the address conversion and the address shown in FIG. 7 is obtained. Can do things.

The display control unit_9909 generates addresses from 00 to 24 in accordance with the address map before the address conversion shown in FIG. 6 and displays the data as corresponding coordinate data in order to perform the display of 5 * 5. That is, coordinates (0,0), (1,0), (2,0), (3,0) ...
00, 01, 02, 03
・ Produces These addresses correspond to the address conversion circuit_99
Are converted to 00, 01, 02, 15... By 09, the display control unit reads out the data at the address 15 as the coordinate (3, 0) data and displays it. Also, coordinates (3,
When writing data to (0), the corresponding address is calculated as 03 according to equation (1), and CPU_9901 supplies address 03 to address bus _9905.This address 03 is converted to address 15 by address conversion circuit _0102 in the same manner as above. The converted data is written to address 15. Thus, the information processing apparatus of the present invention rewrites the contents of the address conversion database of only eight items,
The correspondence between the address of the video RAM and the coordinates is such that two rectangular addresses are exchanged as shown in FIG. The exchange of the rectangles can be performed without reading or writing the video RAM by the CPU_9901 or the like, which requires a very long processing time due to the address exchange.

In the above example, all the contents of the video RAM are displayed. However, when there is a non-display range in the video RAM as shown in FIG. Can be.

In FIG. 8, the memories are addresses 00 to 24.
The display range is 15 pixels from address 00 to 14, the display size is 5 pixels wide and 3 pixels high, and the start address of the display is 00. At this time, the correspondence between the coordinates and the address can be associated not only with the display range but also with the non-display range using the formulas (1), (2), and (3). The position can be specified by the coordinates in the same way as.

In FIG. 8, the non-display range is an area of 3 ≦ y, and the coordinates (0, 3) of the upper left corner and the height
2, the coordinates of the upper left corner included in the rectangle of width 2 and the display area
When a rectangular address having a height of (3,0) and a width of 2 is exchanged, a V having a non-display area in FIG.
It becomes like the correspondence between the coordinates after the address conversion of the RAM and the address. Thus, the information processing apparatus of the present invention can exchange any two different rectangular areas regardless of the display area and the non-display area.

In particular, if the rectangular addresses of the non-display area and the display area are exchanged, the display looks as if new rectangular data has been written. By utilizing this fact, the number of accesses to the video RAM can be reduced when performing display such as animation, scrolling, panning, and the like, in which the processing time is long in the conventional information processing device because the read / write of the video RAM is long. .

As an example of displaying an animation in the information processing apparatus of the present invention, a button pressing animation frequently used in a graphical user interface display will be described with reference to FIGS. In FIG. 10, reference numeral 9904 denotes a video RAM. This video RAM 9904 is divided into a display area 1001 and a non-display area 1002, and the display device 9910 has a display area 1001 (start address SA, display width, display width) in the video RAM 9904. W, height H) are displayed. The coordinates (px, py) of the upper left corner in the display area 1001 of this video RAM 9904,
Draw a normal button picture in a rectangular area 1003 with width pqw and height pqh, and coordinates (qx, qy) of upper left corner in the non-display area 1002, width
When a picture of a button in a pressed state is drawn in a rectangular area 1004 having a height of pqw and a height of pqh, a picture of a button in a normal state is displayed on the display device 9910.

Next, in order to change the display of the button to the pressed state, SA is registered as the display start address, W is displayed as the display width, and H is displayed as the display height of the address conversion database_0101,
The coordinates of the upper left corner of the rectangular area 1003 (px, p
y), the coordinates of the upper left corner of the rectangular area 1004 at the upper left coordinates of the rectangle Q
(qx, qy), rectangular area 1003 and rectangular area 1
The height pqh of the rectangular area 1003 and the height pqh of the rectangular area 1004 are registered in the width pqw of 004 and the height of the rectangle to be exchanged, and the address conversion flag is set to a state where the conversion is performed. According to the address conversion database registered as described above, the address conversion circuit
The address of the rectangular area 1004 is converted to the address of the rectangular area 1003, and the address of the rectangular area 1004 is converted to the address of the rectangular area 1003. Therefore, as shown in FIG.
The display contents of 04 are exchanged, and the display data of the rectangular area 1003 becomes the picture of the pressed button, and the display device 9910 displays the picture of the pressed button.

Further, in order to return the picture of the button to the normal state, the address conversion may be stopped. In other words, the address conversion flag may be rewritten so as not to perform the conversion.

In the conventional information processing apparatus, it is necessary to draw picture data of the pressed button in the rectangular area 1003 in order to change the button to the pressed state. Furthermore, to return to the normal state, it is necessary to draw the picture data of the button in the normal state again in the rectangular area 1003. As described above, in the conventional information processing apparatus, when the operation of pressing and releasing the button is performed, it is necessary to draw the drawing data twice in the rectangular area 1003.
On the other hand, in the information processing apparatus of the present invention, once the drawing data of the pressed button is drawn once in the rectangular area 1004 in the non-display area 1002, thereafter, the operation of pressing and releasing the button is performed several times. Even just by switching between valid and invalid address conversions, there is no need to draw the drawing data on the 9904, and the state of the button can be changed.

In the above example, the animation is performed by exchanging two pieces of display data.
With reference to FIGS. 12 to 16, a description will be given of how the information processing apparatus of the present invention can efficiently perform an animation display in which more than one picture is switched. In FIG. 12, 99
04 is a video RAM, and the video RAM 9904 has a display area of 10
It is divided into two areas, 01 and a non-display area 1002. The start address of the display area 1001 is SA, the display width is W, and the display height is H. At this time, the display device 9910 has video RAM
A display area 1001 in 9904 is displayed. At this time, it is assumed that the pictures drawn in the rectangular areas 1201, 1202, 1203, 1204, and 1205 in FIG. 12 are sequentially displayed on the display device_9910 to perform animation. The coordinates of the upper left corner of the rectangular regions 1201, 12021 203, 1204, 1205 are (px, py), (qx1, qy1), (qx2, qy2), (qx3, qy
3), (qx4, qy4), and the width and height are all pqw and pqh.

First, in order to display the picture originally drawn in the rectangular area 1201 on the display device 9910, it is not necessary to perform address conversion. Therefore, a state in which no conversion is performed is written in the address conversion flag of the address conversion database. Next, in order to display the rectangular area 1202, the rectangular area 1201 and the rectangular area 1202 are displayed.
It is sufficient to write the following content in the address conversion database_0101 because the address of the address is exchanged.

(1) Display start address = SA (2) Display width = H (3) Display height = W (4) Coordinate of upper left corner of rectangle P = (px, py) (5) Upper left corner of rectangle Q Coordinates = (qx1, qy1) (6) Width of rectangle to be replaced = pqw (7) Height of rectangle to be replaced = pqh (8) Address conversion flag = Perform conversion Address conversion circuit_0102 writes the above contents In order to exchange the addresses of the rectangular area 1201 and the rectangular area 12002 in accordance with the obtained address conversion database_0101, the picture drawn in the rectangular area 1202 in FIG. 12 is displayed on the display device 9910 as shown in FIG.

To change this display to the picture drawn in the rectangular area_1203 in FIG. 12, an address conversion database
The coordinates of the upper left corner of the rectangle Q of _0101 can be rewritten to (qx2, qy2). As a result, the address of the rectangular area_1202 whose address has been converted is no longer converted,
Instead, the address of the rectangular area_1203 is exchanged with the address of the rectangular area_1201. Therefore, as shown in FIG. 14, the display device_9910 displays the picture drawn in the rectangular area_1203 in FIG. Similarly, in order to display the picture drawn in the rectangular area 1204 in FIG. 12 on the display device_9910, the coordinates of the upper left corner of the rectangle Q may be rewritten to (qx3, qx3), and the result is shown in FIG. Looks like Further, as shown in FIG. 16, in order to display the picture drawn in the rectangular area_1205 in FIG. 12 on the display device_9910, the coordinates of the upper left corner of the rectangle Q may be rewritten to (qx4, qy4) . In order to return to the display state of FIG. 12, the address conversion flag may be rewritten so as not to perform conversion. To perform the animation from Fig. 12 to Fig. 16 again, the address conversion database
This can be done simply by rewriting the coordinates of the upper left corner of the rectangle Q of _0101.

In order to perform the above-mentioned animation on a conventional display device, rectangular regions — 1201, 1202, 1203, 1204, 120 in FIG.
It is necessary to write the contents of 5,1201,1202,1203,1204,1205 to the rectangular area_1201, and the video RA of pqw * pqh * 10 pixels
Access to M is required. On the other hand, the access to the video RAM by the information processing apparatus of the present invention is performed only once in the rectangular areas _1201, 1202, 1203, 1204, and 1205, and requires only pqw * pqh * 5 pixels.

As described above, the information processing apparatus of the present invention can perform animation processing with many repetitions by accessing very few video RAMs. Scrolling, panning, etc. are processing that frequently rewrites display contents in addition to animation display. These processings can also be performed on the video RAM by effectively using the non-display area of the video RAM in the information processing device of the present invention. Access can be reduced.

An example of scrolling and panning will be described below with reference to FIGS. 17 to 22. Figure
17 is 9904 video RAM, and this video RAM_990
4 is the display area_100 of start address SA, width W, height H
1 and a non-display area_1002 other than the display area, and the contents of the display area_1001 are displayed on the display device_9910. In the display area_1001, the coordinates of the upper left corner with the width pqw and height pqh are (p
A part of the rectangular area_1702 whose upper left corner is (qx, qy) drawn in a cross-shaped “Aie” is displayed in the rectangular area_1701 of (x, py). First, the coordinates of the upper left corner of the rectangular area drawn as “A” at the upper left position of the rectangular area_1702 are (qx, q
In order to display the contents of the rectangular area_1703 having a width of pqw and a height of pqh in y), the following contents may be written in the address conversion database_0101.

(1) Display start address = SA (2) Display width = H (3) Display height = W (4) Coordinate of upper left corner of rectangle P = (px, py) (5) Upper left corner of rectangle Q Coordinate = (qx, qy) (6) Width of rectangle to be replaced = pqw (7) Height of rectangle to be replaced = pqh (8) Address conversion flag = Perform conversion Address conversion circuit_0102 writes the above contents According to the address conversion database _0101, the addresses of the rectangular area_1701 and the rectangular area_1703 are exchanged, and as shown in FIG.
The content drawn in the rectangular area_1703 in FIG. 17 is displayed.

Next, as shown in FIG. 19, in order to display the rectangular area 1901 moved 5 pixels below the rectangular area_1703, the coordinates of the upper left corner of the rectangle Q in the address conversion database_0101 must be changed to (px , qy + 5). As a result, the address exchange between the rectangular area_1701 and the rectangular area_1703 is not performed, and instead, the rectangular area_1701 and the rectangular area_1901 are replaced.
Are exchanged, and as shown in FIG. 20, the content of the rectangular area_1901 in FIG. 19 is displayed on the display device_9910.
Further display of the area moved 5 pixels down is possible by rewriting the coordinates of the upper left corner of the rectangle Q to (qx, qy + 5 + 5). In order to display the contents of the picture moved downward in this manner, the number of pixels to be moved may be added to the y coordinate of the coordinate of the upper left corner of the rectangle Q. Conversely, if you want to display the contents of the picture that has moved upward, you only need to subtract the number of pixels you want to move from the y coordinate of the upper left corner of the rectangle Q. Scrolling the display contents up and down in this way is possible by adjusting the amount of movement to the y coordinate of the upper left corner of the rectangle Q, but similarly moving the display contents in the left and right direction Panning is performed by adding or subtracting the amount of movement to the x coordinate of the upper left corner of the rectangle Q.

As an example, as shown in FIG.
701 is defined as a rectangle P, and the rectangle area_1703 is defined as a rectangle Q. By exchanging the addresses of these two rectangle areas, FIG.
Consider displaying an area that is shifted 10 pixels to the right from the state where the content displayed in the rectangular area_1703 is displayed. As shown in FIG. 21, from the rectangular area_1703 to the right
To display the rectangular area_2101 shifted by 10 pixels, the contents of the address conversion database may be rewritten so that the addresses of the rectangular area_1701 and the rectangular area_2101 are exchanged. That is, if 10 is added to the x coordinate of the coordinate of the upper left corner of the rectangle Q, the contents drawn in the rectangular area_2101 before the address conversion as shown in FIG.
Appears on 1.

As described above, scrolling and panning can be performed by independently changing the y coordinate and the x coordinate of the coordinates of the upper left corner of the rectangle Q. Further, by simultaneously changing the y coordinate and the x coordinate of the coordinates of the upper left corner of the rectangle Q, the display contents can be moved in an oblique direction. For example,
As shown in FIG. 18, a rectangular area_1701 is a rectangular P, a rectangular area
By changing the address of these two rectangular areas by replacing _1703 with a rectangle Q, the contents displayed in the rectangular area _1703 in FIG. 17 were moved 10 pixels to the right and 5 pixels down from the state displayed. Suppose you want to display an area. Figure 2
As shown in 3, 10 pixels to the right from the rectangular area_1703,
To display the rectangular area _2301 moved 5 pixels down,
What is necessary is just to rewrite the contents of the address conversion database so that the addresses of the rectangular area_1701 and the rectangular area_2301 are exchanged. That is, the x coordinate of the upper left corner of the rectangle Q is 10
, And adding 5 to the y-coordinate, the contents drawn in the rectangular area_2301 before the address conversion in FIG. 23 are displayed on the display device_9901 as shown in FIG. As described above, according to the information processing apparatus of the present invention, it is possible to move and display the display content of a partial rectangular area on the display screen in an arbitrary direction without changing the content of the video RAM_9904. Therefore, CPU_99
The number of accesses to the video RAM_9904 by 01 or the like can be reduced, and other processes such as communication can be efficiently performed while smoothly changing the display.

In the above example, animation, scrolling, panning, and moving display in a diagonal direction in a rectangular area of a part of the display area have been described. , Scrolling, panning, and moving display in an oblique direction are also possible.

Further, the display, deletion, and moving display of the window in a rectangular area of the display area can be performed efficiently. As shown in FIG. 25, it is assumed that the content of the background display in the display area_1001 is written, and a window is drawn in the rectangular area_2502 in the non-display area_11002. At this time, the display area_1001
To display the window drawn in the rectangular area_2502 in the rectangular area_2501 inside the rectangular area_2501 and the rectangular area_2502
Address conversion database to exchange addresses
What is necessary is just to rewrite the content of _0101. When the rectangles are exchanged in this manner, as shown in FIG. 26, the display contents of the window are moved to the rectangular area_2501 in the display area_1001, and the display data of the background is hidden without being lost by this window. To the rectangular area_2502 in the non-display area_1002.
For this reason, when closing the window displayed in this rectangular area_2501, there is no need to redraw the contents of the background in this rectangular area_2501, and do not exchange addresses between the rectangular area_2501 and the rectangular area_2502. Address translation database_0
What is necessary is just to rewrite the content of 101. In this way, the correspondence between the contents of the video RAM and the coordinates returns to the state shown in FIG. 25, and the originally displayed background is displayed.

Similarly, the window can be moved by rewriting the address conversion database. Figure 27
Assume that a window is displayed in the rectangular area_2501 in the display area_1001 and then the window is moved to the rectangular area_2701. First, if the addresses of the rectangular area_2501 and the rectangular area_2502 are registered in the address conversion database so as to be exchanged, the display data of the window can be moved to the rectangular area_2501 as shown in FIG. Next, when the address conversion database is rewritten to exchange the rectangular area_2701 and the rectangular area_2502, the rectangular area_2501 and the rectangular area 250
Since the exchange of 2 is not performed, the background that was originally displayed is displayed in the rectangular area_2501, and a window is displayed in the rectangular area_2701, and the state changes as shown in FIG. In this way, if the window is moved, the background content of the rectangular area in which the window is displayed becomes rectangular area_2502.
Therefore, even after the window is moved, the window can be easily closed simply by rewriting the address conversion database so as not to perform the address conversion.

In the above example, an apparatus for exchanging addresses of a rectangular area having no set of common areas has been described. However, this apparatus can exchange addresses of a rectangular area having no sets of common areas. Can be extended. For example, 3
Set of rectangular areas (P1 and Q1), (P2 and Q2), (P3 and Q3)
In order to perform the address exchange, the address conversion database _0101 may be expanded so that the contents shown in FIG. 29 can be written, and the address conversion circuit _0102 may be changed to perform the address conversion according to the flowchart of FIG. .
The contents of the address conversion database shown in FIG. 29 are exchanged with the display start address SA, the display screen width W, and the display screen width H required to obtain the correspondence between the address and the coordinates.
The coordinates of the upper left corner of the three pairs of rectangles (px1, py1), (qx1, qy1), (p
x2, py2), (qx2, qy2), (px3, py3), (qx3, qy3) and the width pqw1, pqw2, pqw3, height pqh1,
Address conversion flag F1, which indicates whether to exchange the address of the rectangular area of the specified rectangular group with pqh2, pqh3
F2 and F3.

The address conversion circuit_0102 performs address conversion with reference to the contents of the address conversion database_0101 shown in FIG. This procedure will be described with reference to the flowchart in FIG. First, in step _3001, if the address conversion flag 1 is set to perform conversion, the conversion to be performed is
(px1, py1) is (px, py), (qx1, qy1) is (qx, qy), pqw1 is pq
Address conversion is performed according to the flowchart of FIG. 5 by making w and pqh1 correspond to pqh. In step _3002, if the address conversion flag 2 is to perform conversion, (px2, py2) is (px, py), (qx2, qy2) is (qx, qy), and pqw2 is
pqw and pqh2 are made to correspond to pqh, and the address converted in step_3001 is further converted according to the flowchart of FIG. In step _3003, if the address conversion flag 3 indicates that conversion is to be performed, (px3, py3) is changed to (px, py), (qx
(3, qy3) corresponds to (qx, qy), pqw3 corresponds to pqw, and pqh3 corresponds to pqh.
The address converted in step_3002 is further converted according to the flowchart of FIG. As described above, the address conversion circuit_0102 outputs the address that has been converted in three steps by Step_3001 to Step_3003.

As described above, in the information processing apparatus capable of exchanging the addresses of three sets of rectangular areas, the overlapping display of three windows and the erasing and moving of the windows are performed by the video RA.
By effectively using the non-display area of M, it can be performed without accessing the video RAM. Hereinafter, the display of the overlap window will be described with reference to FIGS. In FIG. 31, 9904 is a video RAM, which has a start address SA, a width W, and a height H.
Is divided into a display area_1001 and a non-display area_1002 other than the display area, and the contents of the display area_1001 are displayed on the display device_9910. Rectangular area_3101 in non-display area_1002, rectangular area_3
It is assumed that display data of three windows to be displayed has been written in the rectangular area_3103 from now on. At this time, first, in order to display the window 1 drawn in the rectangular area 3101 in the rectangular area_3104, the rectangular area_3101 and the rectangular area_3104 are defined as rectangles P1 and Q1, and the rectangle is set at the coordinates of the upper left corner of the rectangle P1. The coordinates of the upper left corner of area_3101, the coordinates of the upper left corner of rectangle Q1 in the upper left corner, and the coordinates of the upper left corner of rectangle area_3104, and the rectangular area in which the data of window 1 is drawn in width 1 and height 1 of the rectangle to be exchanged When the width and height of _3101 are written and the address conversion flag 1 is used to convert the address, the display data of window 1 moves to the rectangular area _3104 and window 1 is displayed as shown in FIG. Next, the window 2 drawn in the rectangular area_3102 is changed to the area_310 where the window 1 is displayed.
It is displayed in the rectangular area_3105 having the common part with 4. At this time,
Window 2 is displayed so as to overlap window 1. The rectangular area_3102 and the rectangular area_3105 are defined as rectangles P2 and Q2, and the coordinates of the upper left corner of the rectangular area_3102 are defined as the coordinates of the upper left corner of the rectangle P2, and the upper left corner of the rectangular area_3105 are defined as the coordinates of the upper left corner of the rectangle Q2. Assuming that the coordinates and the width and height of the rectangular area_3102 in which the data of the window 2 is drawn are written in the width 2 and height 2 of the rectangle to be exchanged, and the address conversion flag 2 is used to convert the address, FIG. The display data of the window 2 is moved to the rectangular area_3105 as shown in FIG. Further, in order to display the window 3 drawn in the rectangular area_3103 in the rectangular area_3106 so as to be superimposed thereon, the rectangular area_3103 and the rectangular area_3106 are defined as rectangles P3 and Q3, and the rectangle P3
The coordinates of the upper left corner of the rectangular area_3103 to the coordinates of the upper left corner of the rectangle
Write the coordinates of the upper left corner of the rectangular area _3106 in the coordinates of the upper left corner of Q3, and the width and height of the rectangular area _3103 in which the data of window 2 is drawn in the width 3 and height 3 of the rectangle to be exchanged, If the address conversion flag 3 is used to perform address conversion,
As shown in FIG. 34, the display data of window 3 is rectangular area_31.
The window moves to 06 and window 3 is displayed.

The window 3 is displayed so as to overlap the windows 1 and 2 and the window 2 is displayed so as to overlap the window 1. The address conversion is performed by exchanging the rectangle P1 and the rectangle Q1 according to the flowchart shown in FIG. This is because rectangles P2 and Q2 are further exchanged for the result of the address translation, and rectangles P3 and Q3 are further exchanged for the result. If window 1 is displayed by exchanging rectangles P2 and Q2,
When the address conversion table is rewritten so that the display of “1” is performed by exchanging the rectangles P1 and Q1, window 1 is displayed so as to overlap window 2. Window 3 remains displayed due to the exchange of rectangles P3 and Q3,
It is displayed so as to overlap windows 1 and 2. In this way, the vertical relationship of the window display can be changed only by changing the address conversion order.

The information processing apparatus for exchanging addresses of rectangular areas not having three sets of common areas has been described above. However, the information processing apparatus is further extended to exchange addresses of n (positive integers) rectangular areas. it can. For example, n sets of rectangular areas (P
1 and Q1), (P2 and Q2), ..., (Pn and Qn)
_0101 may be expanded so that the contents shown in FIG. 35 can be written, and the address conversion circuit _0102 may be changed to perform address conversion according to the flowchart of FIG. The contents of the address conversion database shown in FIG. 35 are the display start address S required to obtain the correspondence between the address and the coordinates.
A, the width W of the display screen, the height H, and the coordinates of the upper left corner of the n pairs of rectangles to be exchanged (px1, py1), (qx1, qy1), (px2, py2),
(qx2, qy2), ..., (pxn, pyn), (qxn, qyn) and the width pqw1, pqw2, ..., pqwn, height pqh1,
Address conversion flag that indicates whether to exchange the address of the rectangular area of the set of pqh2, ..., pqhn and the specified rectangle
F1, F2, ..., Fn.

The address conversion circuit _0102 performs address conversion with reference to the contents of the address conversion database _0101 shown in FIG. This procedure will be described with reference to the flowchart in FIG. First, in step _3601, if the address conversion flag 1 indicates that conversion is to be performed,
(px1, py1) is (px, py), (qx1, qy1) is (qx, qy), pqw1 is pq
Address conversion is performed according to the flowchart of FIG. 5 by making w and pqh1 correspond to pqh. In step _3602, if the address conversion flag 2 is to perform conversion, (px2, py2) is (px, py), (qx2, qy2) is (qx, qy), and pqw2 is
pqw and pqh2 are made to correspond to pqh, and the address converted in step_3601 is further converted according to the flowchart of FIG. In this way, the address converted in each step is further converted in the next step, and the processing is sequentially performed in step_3.
In 60n, if the address conversion flag n is set to perform conversion, (pxn, pyn) is set to (px, py), and (qxn, qyn) is set to (qx, q
y), pqwn corresponds to pqw, pqhn corresponds to pqh, and the address converted in step_360n-1 is further converted according to the flowchart of FIG. As described above, the address conversion circuit_0102 outputs an address that has been converted by n stages in steps 3601 to 360n.

The device for exchanging the addresses of the n sets of rectangular areas, like the apparatus for exchanging the addresses of one set of rectangular areas, simply rewrites the database for address conversion, and only converts the non-display area of the video RAM. Animation, scrolling, panning,
The display contents can be moved in an oblique direction, windows can be displayed, erased, moved, etc., and overlap display of n windows can be controlled in the same way as a device that exchanges addresses of three rectangular areas.

As described above, the apparatus cannot exchange a rectangular area having a common part, but an example in which an address can be converted even when the apparatus has a common part is shown in FIG.
This will be described with reference to FIGS. 4, 5, and 37 to 45. As shown in FIG. 37, when two rectangles P and Q having a common part are exchanged, the exchange is performed with reference to the contents of the address translation database_0101 shown in FIG. If rectangles P and Q do not have a common part, address conversion is performed according to the flowchart of FIG. 5 as described above, and if rectangles P and Q have a common part, as shown in FIG. Part
Move to the position of the rectangle Q as included in the rectangle P as before, and move the points included in the rectangle Q other than the common part to the part of the rectangle P other than the common part. The movement as shown in FIG. 38 is realized by address conversion according to the flowchart shown in FIG.

A video RAM 3701 shown in FIG.
The rectangle P on AM_3701 has the coordinates of the upper left corner as (px, py), and the width is
It is a rectangle with pqw and height pqh, and rectangle Q is a rectangle with width pqw and height pqh, where the coordinates of the upper left corner are (qx, qy). Figure 38
Numeral 3801 shown in the figure indicates an image of the video RAM after the address conversion. First, the video RAM_3701 before address conversion is divided into the following five areas by rectangles P and Q as shown in FIG.

(1) P: area of rectangular P (2) QX: of area of Q not included in the common part of P and Q,
Area located in the vertical direction of P (3) QY: Of the area of Q not included in the common part of P and Q,
Area located in the left and right direction of P (4) QXY: Area of Q not included in the common part of P and Q but not included in QX and QY (5) Area not included in rectangles P and Q Address The converted video RAM_3801 is also divided into the following five areas by rectangles P and Q.

(1) Q: Area of rectangular Q (2) PX: Of areas of P not included in the common part of P and Q,
Areas located in the vertical direction of Q (3) PY: Of the areas of P that are not included in the common part of P and Q,
Area located in the left and right direction of Q (4) PXY: Area of P not included in the common part of P and Q but not included in PX and PY (5) Area not included in rectangle P and Q Address Is performed as follows, as shown in FIG.

(1) The address of area P is converted to the address of area Q. (2) The address of area QX is converted to the address of area PX. (3) The address of area QY is converted to the address of area PY. (4) The area QXY Address is converted to the address of area PXY (5) Areas not included in rectangles P and Q do not perform address conversion The address conversion circuit_0102 performs coordinate conversion when the address conversion flag is set to perform conversion. Convert input address AIN to output address AOUT by referring to _0101. The procedure of the address conversion will be described with reference to the flowchart shown in FIG. First, in step _3901, the coordinates corresponding to the input address AIN are calculated using equations (2) and (3).
Calculate (x, y). Next, in step_3902, it is determined in which area on the video RAM the coordinates (x, y) calculated in step_3901 are included.

In the case of being included in the rectangular area P, that is,
If (9) is satisfied, proceed to step _3903 to convert AOUT into equation (1
0).

(Px ≦ x <px + pqw) and (py ≦ y <py + pqh) (9) AOUT = SA + (x + (qx-px)) + (y + (qy-py)) * W ... (10) qx-px in the second item of this equation (10) is from rectangle P to rectangle Q
Is the amount of change in the x coordinate when moving to, and q in the third item
y-py represents the amount of change in the y coordinate when moving from rectangle P to rectangle Q, and the coordinates of the destination are (x + (px-qy), y + (qy
-py)), which is converted into an address by equation (1) to calculate the destination address.

Also, the coordinates (x,
y) is included in the rectangular area QX, that is, when the following equation (11) is satisfied, the process proceeds to step _3904, and AOUT is calculated by the equation (1).
Calculate according to 2).

Max (py, qy) ≦ y <min (py + pqh, py + pqh) and [(qx ≦ x <px) or (px + pqw ≦ x <px + pqw)] (11) AOUT = SA + x + (y + sign (py-qy) * pqh) * W ・ ・ ・ (12) In equation (11), max (a, b) represents the larger value of a and b, and min
(a, b) represents the smaller value of a and b. Equation (1)
Sgn (a) in 2) indicates the sign of a, and takes the value 1 if a is positive, -1 if it is negative, and 0 if it is 0.

In addition, when the coordinates (x, y) calculated in step_3901 are included in the rectangular area QY, that is, when the equation (13) is satisfied, the process proceeds to step_3905 and AOUT
Is calculated according to equation (14).

Max (px, qx) ≦ x <min (px + pqw, qx + pqw) and [(qy ≦ y <py) or (py + pqh ≦ y <qy + pqh)] (13) AOUT = SA + (x + sgn (px-qx) * pqw) + y * W (14) When the rectangular area QXY contains the coordinates (x, y) calculated in step _3901, If 15) holds, the process proceeds to step_3906 to calculate AOUT according to equation (16).

[(Qx ≦ x <px) or (px + pqw ≦ x <qx + pqw)] and [(qy ≦ y <py) or (py + pqh ≦ y <qy + p qh)] (15) AOUT = SA + (x + sgn (px-qx) * pqw) + (y + sgn (py-qy) * pqh) * W ... (16) And both rectangular areas P and Q If not included, the process proceeds to step_3907 to calculate AOUT according to the following equation (17).

AOUT = AIN (17) As described above, step_3903, step_3904, step_3
By calculating AOUT by any one of the steps 905, 3906, and 3907, as shown in FIG.
The addresses of rectangular areas P and Q having a common part can be exchanged.

Since the exchange of the rectangular address having the common part is made possible, the number of accesses to the video RAM related to the processing such as the movement of the window display without using the non-display area of the video RAM can be reduced. Can be reduced. Figure 4
As shown in 0, (px, py) on the video RAM_4001 is the coordinate of the upper left corner, and the rectangular area _4002 with width pqw and height pqh is (qx, qy)
Is moved to _4003, where (qx, qy) is the upper left corner coordinate of the window picture drawn in. When such processing is performed, a picture hidden by a window is written in the rectangular area_4002 in the conventional information processing apparatus, and the rectangular area_4002 is written.
In _4003, it was necessary to draw a picture of the window drawn in the rectangular area _4002, and it was necessary to draw data for 2 * pqw * pqh pixels in the video RAM_4001.

On the other hand, in the information processing apparatus of the present invention, the address conversion circuit uses the rectangular area_4002 as shown in FIG.
Since the address of the rectangular area_4003 can be replaced with the address of the rectangular area_4003, the background_4201 in which the contents of the rectangular area_4002 were originally hidden by the window may be written as shown in FIG.
As described above, in the information processing apparatus of the present invention, the data to be drawn in the video RAM_4001 is a half of that when the information processing apparatus is not used.
Only pqw * pqh pixels are needed.

When the movement of the window is considered, only when the rectangular area where the picture of the source window is drawn and the destination rectangular area do not have a common area as described with reference to FIGS. Instead, they may have a common area as shown in FIG. Window picture is on video RAM_4301
Let (px, py) be the coordinates of the upper left corner, and draw the picture of the window drawn in the rectangular area _4302 with width pqw and height pqh as the rectangular area _4302 and the rectangular area _4303 (the upper left coordinate (qx , qy)). In this case, in the conventional information processing apparatus, the picture of the window is drawn in the rectangular area_4303, and the background picture hidden in the window before moving is moved to a part of the rectangular area_4302 that is not included in the rectangular area_4303. I needed to paint.

However, in the information processing apparatus of the present invention, the rectangular area_4302 is moved to the rectangular area_4303 by the address conversion circuit as shown in FIG. 44, and the rectangular area_4 in the rectangular area_4303 is moved.
304 to rectangular area_4401, rectangular area_4305 to rectangular area_4402
The rectangular area_4306 can be moved to the rectangular area_4403. For this reason, it is necessary to draw in the video RAM_4301 as shown in FIG.
Only the data of the background_4501 that is not included in the image, the rectangular area_4401, the rectangular area_4402, and the rectangular area_4403 that were originally hidden by the picture of the window drawn in the rectangular area_4403.

In the above, an apparatus for exchanging addresses of an arbitrary set of rectangular areas has been described. However, this apparatus can be extended so that addresses of a plurality of sets of rectangular areas can be exchanged. For example, n (positive integer) pairs of rectangular areas (P1 and Q1),
(P2 and Q2), ..., (Pn and Qn)
The address conversion circuit_01 which can write the contents shown in 5
02 is converted according to the flowchart of FIG. The contents of the address conversion database shown in FIG. 35 are the display start address SA, the display screen width W, the height H, and the upper left corner of n sets of rectangles to be exchanged for obtaining the correspondence between the address and the coordinates. Coordinates (px1, py1), (qx
1, qy1), (px2, py2), (qx2, qy2), ・ ・ ・, (pxn, pyn), (qx
n, qyn) and the width pqw1, pqw2,
, Pqwn, height pqh1, pqh2, ..., pqhn and address conversion flags F1, F2, ..., Fn indicating whether or not to exchange addresses of a rectangular area of a specified rectangular group. .

The address conversion circuit_0102 performs address conversion with reference to the contents of the address conversion database_0101 shown in FIG. This procedure will be described with reference to the flowchart in FIG. First, in step _3601, if the address conversion flag 1 indicates that conversion is to be performed,
(px1, py1) is (px, py), (qx1, qy1) is (qx, qy), pqw1 is pq
w and pqh1 are made to correspond to pqh, and if P1 and Q1 do not have a common part, address conversion is performed according to the flowchart of FIG. 5, and if P1 and Q1 have a common part, address conversion is performed according to the flowchart of FIG. In step _3002, if the address conversion flag 2 indicates that conversion is to be performed, (px2, py2) is set to (p
x, py), (qx2, qy2) to (qx, qy), pqw2 to pqw, pqh2 to pqh.If P1 and Q1 do not have a common part, follow the flowchart in FIG. According to the flowchart of FIG. 39, the address converted in step_3601 is further converted. In this way, the address converted in each step is further converted in the next step in order.In step _360n, if the address conversion flag n indicates that the conversion is to be performed, (pxn, pyn) is changed to ( px, p
y), (qxn, qyn) correspond to (qx, qy), pqwn corresponds to pqw, pqhn corresponds to pqh, and if Pn and Qn do not have a common part, follow the flowchart of FIG. The address converted in step_360n-1 is further converted according to the flowchart of FIG. As described above, the address conversion circuit_0
102 outputs an address that has been converted by n stages in steps 3601 to 360n.

The apparatus for exchanging addresses between rectangles has been described so far. As shown in FIG. 46, an apparatus for converting addresses in a certain rectangle so as to move in a circular direction in the y direction will be described with reference to FIG. This will be described next with reference to FIG. In FIG. 46, reference numeral 4601 denotes an image of the video RAM before the address conversion, and reference numeral 4603 denotes an image after the address conversion. Let (px, py) on the video RAM be the coordinates of the upper left corner,
Address the address in the rectangle P of width pw and height ph in the y direction sy (0
≤sy <ph) Move circularly by pixels. This cyclic movement divides the rectangular area _4602 before address conversion into a rectangular area PA with an upper height ph-sy and a rectangular area PB with a lower height sy,
Considering the rectangular area _4602 after the address conversion as a rectangular area _4603 with an upper height of sy and a rectangular area _ with a lower height of ph-sy, the address of the rectangular area PA is converted into a shape area _4605 address. The address of the rectangular area PB is converted to the address of the rectangular area_4604.

This conversion is performed by the address conversion circuit_0102 shown in FIG.
Address translation database _0101 with the contents of
And converting the address according to the flowchart of FIG. 48. The contents of the address conversion database shown in FIG. 47 include a display start address SA, a display screen width W, a height H, and a rectangular area P for performing cyclic movement in the vertical direction, which are necessary for obtaining a correspondence between an address and a coordinate.
Coordinates (px, py) of the upper left corner of the rectangle and height ph and width p of the rectangular area P
The amount of movement sy in the w and y directions. FIG. 4 shows a procedure in which the address conversion circuit_0102 performs address conversion by referring to these values.
This will be described with reference to the flowchart of FIG. First step_48
In 01, the coordinates corresponding to the input address AIN are calculated using equations (2) and (3). Next, in step _4802,
It is determined in which area on the video RAM the coordinates calculated in step_4801 are included.

In the case of being included in the rectangular area PB,
If (18) holds, the output address AOUT
Is calculated.

(Px ≦ x <px + pw) and (py + ph-sy ≦ y <py + ph) ・ ・ ・ (18) AOUT = SA + x + (y + ph-sy) ・ ・ ・ (19) Further, when the area is included in the rectangular area PA and the equation (20) is satisfied, the output address AOUT is calculated according to the equation (21).

(Px ≦ x <px + pw) and (py ≦ y <py + ph-sy) ・ ・ ・ (20) AOUT = SA + x + (y + sy) * W ・ ・ ・ (21) Rectangular PA , PB, the output address AOUT is calculated by the following equation (22).

AOUT = AIN (22) Next, an example in which scrolling is performed by using an address conversion circuit that circulates and moves addresses in a certain rectangle in the vertical direction as described above will be described with reference to FIGS. This will be described using 51. Fig. 49
, 4901 is a video RAM, the display start address of which is SA, the display width is W, the height is H, and the video RAM is
The upper (px, py) is set to the coordinates of the upper left corner, and a part of the image vertically drawn as “A” shown in 4902 in a rectangular area — 4905 having a width pw and a height ph is displayed as a rectangular area. In FIG. 49, the contents of the area_4903 drawn as “A” are displayed in the rectangular area_4905. Next, a rectangular area _4903 that is scrolled vertically by sy pixels and is drawn as "A" The lower ph-sy line area and the lower rectangular area _490
The area for the upper ph-sy line of 4 is displayed.
First, when the contents of the address conversion database are set as follows, the rectangular area_4905 display is circulated by sy as shown in FIG.
5001 shows the upper sy line of "A".

(1) Display start address SA (2) Display width W (3) Display height H (4) Upper left corner coordinates of rectangle P (px, py) (5) Height ph of rectangle P (6) The width of the rectangle P pw (7) The amount of movement in the y direction sy Next, as shown in FIG.
The target display can be obtained by drawing the contents of the area_5101 for the sy lines above the area_4904 drawn in the rectangular area_5001.

On the other hand, when such a display change is performed by a conventional information processing apparatus, it is necessary to rewrite all of the rectangular area_4905.

Although the apparatus for circulating the address of any one rectangular area in the y direction has been described, this apparatus can be extended to circulate the addresses of a plurality of rectangular areas. For example, m (positive integer) pairs of rectangular areas (P1 and Q1),
(P2 and Q2), ..., (Pm and Qm)
The address conversion circuit_010 that can write the contents shown in
2 is performed so that the address is converted according to the flowchart of FIG. The contents of the address conversion database shown in FIG. 52 include the display start address SA, the width W of the display screen, and the height required for obtaining the correspondence between the address and the coordinates.
H, the coordinates of the upper left corner of the m rectangles (px1, py
1), (px2, py2), ..., (pxm, pym) and the width of the rectangular area of each set pw1, pw2, ..., pwm, and height ph1, ph2, ..., phm Of the circular movement of the rectangular area in the y direction
・, Sym.

The address conversion circuit_0102 performs address conversion by referring to the contents of the address conversion database_0101 shown in FIG. This procedure will be described with reference to the flowchart in FIG. First, in step _5301, (px1, py
1) is made to correspond to (px, py), pw1 is made to correspond to pw, and ph1 is made to correspond to ph, and address conversion is performed according to the flowchart of FIG. In step _5302, (px2, py2) is (px, py), pw2 is pw,
ph2 is made to correspond to pqh, and the address converted in step_5301 is further converted according to the flowchart of FIG. In this way, the address converted in each step is further converted in the next step, and the process is performed in order.
At 30m, (pxm, pym) is (px, py), pwm is pw, phm is p
In accordance with h, the address converted in step_530m-1 is further converted according to the flowchart of FIG. As described above, the address conversion circuit_0102 outputs an address that has been converted by m stages from step_5301 to step_530m.

In the above, an apparatus for circulating an address in a rectangular area in the vertical direction has been described. However, as shown in FIG. 54, an apparatus for converting an address in a certain rectangle to circulate in the x direction is described. This will be described with reference to FIGS. 54 to 61. In FIG. 54, reference numeral 5401 denotes an image of the video RAM before the address conversion, and reference numeral 5403 denotes an image after the address conversion. Let (px, py) on this video RAM be the coordinates of the upper left corner, and write the address in the rectangle P of width pw and height ph in the x direction sx
(0 ≦ sy <pw) Move circularly by pixels. This circular movement divides the rectangular area _5402 before address conversion into a rectangular area PL with a width pw-sx on the left and a rectangular area PR with a width sx on the right, and divides the rectangular area _5402 after the address conversion into a rectangle with a left width sx Area_5405
And rectangular area _5404 with width pw-sx on the right side,
The address of the PL is converted into the address of the rectangular area_5404, and the address of the rectangular area PR is converted into the address of the rectangular area_5405. The address translation circuit _0102 refers to the address translation database _0101 in which the content of FIG. 55 is written, and translates the address according to the flowchart of FIG. The contents of the address conversion database shown in FIG. 55 include the display start address S required to obtain the correspondence between the address and the coordinates.
A, width W and height H of the display screen, coordinates (px, py) of the upper left corner of the rectangular area P that performs cyclic movement in the vertical direction, and height ph, width pw, and movement of the rectangular area P in the x direction The quantity sx. A procedure in which the address conversion circuit_0102 performs address conversion with reference to these values will be described with reference to the flowchart in FIG. First, in step_5601, coordinates corresponding to the input address AIN are calculated using equations (2) and (3). Next step_5
In 602, the coordinates calculated in step_5601 are
It is determined which area on M is included.

In the case of being included in the rectangular area PL,
If (23) is satisfied, the flow advances to step 5604 to calculate the output address AOUT according to the equation (24).

(Px ≦ x <px + pw-sx) and (py ≦ y <py + ph) (23) AOUT = SA + (x + sx) + y * W (24) If it is included in the rectangular area PR and the equation (25) is satisfied, the process proceeds to step_5603 to calculate the output address AOUT according to the equation (26).

(Px + pw-sx ≦ x <px + pw) and (py ≦ y <py + ph) ・ ・ ・ (25) AOUT = SA + (x-pw + sx) + y * W ・ ・ ・ ( 26) If not included in rectangles PL and PR, proceed to step _5605,
The output address AOUT is calculated by the following equation (27).

AOUT = AIN (27) Next, FIGS. 57, 58, and 59 show an example in which panning is performed using an address conversion circuit that circularly moves addresses in a certain rectangle as described above. This will be described with reference to FIG. In FIG. 57, reference numeral 5701 denotes a video RAM, the display start address of which is SA, the display width is W, and the height is H.
(px, py) is the coordinates of the upper left corner, and a rectangular area of width pw and height ph
Suppose that a part of the image drawn with “Ai” beside 5702 in _5705 is displayed in the rectangular area _5705. In FIG. 57, the contents of the area_5703 drawn as “A” are displayed in the rectangular area_5705. Next, the area for the right pw-sx line of the rectangular area _5703 that is panned by sx pixels horizontally and drawn as “A”, and the rectangular area _5704 further drawn to the right of “i”
Consider that a region for the left pw-sx line of is displayed. First, when the contents of the address conversion database are set as follows, the display of the rectangular area_5705 is cyclically moved by sx as shown in FIG. 58, and the rectangular area_5801 for the right sx line of the rectangular area_5705 is displayed as “A”. Is displayed for the left sx line.

(1) Display start address SA (2) Display width W (3) Display height H (4) Coordinate of upper left corner of rectangle P (px, py) (5) Height ph of rectangle P (6) The width of the rectangle P pw (7) The amount of movement in the x direction sx Next, as shown in FIG.
By drawing the contents of the area _5901 for sx lines on the left side of the area _5704 drawn in the rectangular area _5801, the intended display can be obtained.

On the other hand, when such a display change is performed by the conventional information processing apparatus, it is necessary to rewrite all of the rectangular area_5705.

The apparatus for circulating the address of an arbitrary rectangular area in the x direction has been described. However, this apparatus can be extended to circulate the addresses of a plurality of rectangular areas. For example, m (positive integer) pairs of rectangular areas P1, P2, ...
In order to move the address of Pm cyclically, the address conversion database _0101 is extended so that the contents shown in FIG. 60 can be written, and the address conversion circuit _0102 performs the address conversion according to the flowchart of FIG. I do. Figure
The contents of the address conversion database shown in 60 are exchanged with the display start address SA, display screen width W, height H required to find the correspondence between addresses and coordinates.
The coordinates of the upper left corner of the m rectangles (px1, py1), (px2, py2), ..., (p
xm, pym) and the width of each rectangular area pw1, pw2, ..., pwm,
The heights ph1, ph2, ..., phm and the movement amounts sx1, sx2, ..., sxm of the circular movement in the x direction of the specified rectangular area.

The address conversion circuit_0102 performs address conversion with reference to the contents of the address conversion database_0101 shown in FIG. This procedure will be described with reference to the flowchart in FIG. First, in step _6101, (px1, py
Address conversion is performed according to the flowchart of FIG. 56 by associating (1) with (px, py), pw1 with pw, and ph1 with ph. In step _6102, (px2, py2) is (px, py), pw2 is pw,
ph2 is made to correspond to pqh, and the address converted in step_6101 is further converted according to the flowchart of FIG. In this way, the address converted in each step is further converted in the next step, and the processing is sequentially performed in step _6.
At 10m, (pxm, pym) is (px, py), pwm is pw, phm is p
h and sxm are made to correspond to sx, and the address converted in step_610m-1 is further converted according to the flowchart of FIG. As described above, the address conversion circuit_0102
From 01, the address converted by m steps in step_610m is output.

In the above, the device for circulating the address in the rectangular area in the horizontal or vertical direction has been described.
As shown in FIG. 62, a device for converting an address in a certain rectangle so as to circulate in an oblique direction is described with reference to FIGS.
This will be described with reference to FIG. In FIG. 62, reference numeral 6201 denotes an image of the video RAM before the address conversion, and reference numeral 6203 denotes an image after the address conversion. Let (px, py) on this video RAM be the coordinates of the upper left corner, and set the address in the rectangle _6202 of width pw and height ph by sx (0 ≦ sx <pw) pixels in the x direction and sy in the y direction.
(0 ≦ sy <ph) The pixel is circulated and moved by pixels. This circular movement converts the rectangular area _6202 before address conversion to the upper left width pw-sx,
A rectangular area PAL having a height ph-sy, a rectangular area PBL having a height sy and a width pw-sx on the lower left side, and a rectangular area PA having a width sx and a height ph-sy on the upper right side
R, rectangular area PBR with lower right side width sx and height sy, and rectangular area _6202 after address conversion is converted to lower right side width pw-sx and height ph
-sy rectangular area_6204, upper right width pw-sx, height sy rectangular area_6205, lower left width sx, height, ph-sy rectangular area_620
6, Given a rectangular area _6207 with width sx and height sy on the upper left,
The address of the rectangular area PAL is converted into the address of the rectangular area_6204, the address of the rectangular area PBL is converted into the address of the rectangular area_6405, the address of the rectangular area PAR is converted into the address of the rectangular area_6206, and the rectangular area is converted. PBR address in rectangular area_
Translated to 6407 address. The address conversion circuit _0102 is the address conversion database _0 in which the contents of FIG. 63 are written.
Referring to 101, the address is converted according to the flowchart of FIG. The contents of the address translation database shown in FIG. 63 include a display start address SA, a display screen width W, a height H,
And the coordinates of the upper left corner of the rectangular area P that moves cyclically in the vertical direction
(px, py) and the height ph, width pw, movement amount sy in the y direction, and movement amount sx in the x direction of the rectangular area P. A procedure in which the address conversion circuit_0102 performs address conversion with reference to these values will be described with reference to the flowchart in FIG. First steps
In _6401, the input address AIN is calculated using equations (2) and (3).
Is calculated. Next, in step_6402, it is determined which area on the video RAM contains the coordinates calculated in step_6401.

When the area is included in the rectangular area PAL, that is, the expression
If (28) is satisfied, the process proceeds to step 6403, and the output address AOUT is calculated according to the equation (29).

(Px ≦ x <px + pw-sx) and (py ≦ y <py + ph-sx) ・ ・ ・ (28) AOUT = SA + (x + sx) + (y + sy) * W (29) If the expression is included in the rectangular area PBL and Expression (30) is satisfied, the process proceeds to Step_6404, and the output address AOUT is calculated according to Expression (31).

(Px ≦ x <px + pw-sx) and (py + ph-sy ≦ y <py + ph) ・ ・ ・ (30) AOUT = SA + (x + sx) + (y + ph-sy) * W (31) If the area is included in the rectangular area PAR, that is, if the equation (32) holds, the process proceeds to step 6405, and the output address AOUT is calculated according to the equation (33).

(Px + pw-sx ≦ x <px + pw) and (py + ph-sy ≦ y <py + ph) ・ ・ ・ (32) AOUT = SA + (x-pw + sx) + (y + sy) * W (33) If the expression (34) is satisfied if it is included in the rectangular area PBR, the flow advances to step_6406 to calculate the output address AOUT according to the expression (35).

(Px + pw-sx ≦ x <px + pw) and (py + ph-sy ≦ y <py + p
h) (34) AOUT = SA + (x-pw + sx) + (y + ph-s)
y) * W (35) If it is not included in the rectangles PAL, PBL, PAR, and PBR, the process proceeds to step_6407 to calculate the output address AOUT by the following equation (36).

AOUT = AIN (36) Address conversion in accordance with the flow chart of FIG.
In the contents of the 64 databases, in particular, if the movement amount in the x direction is set to 0, cyclic movement is performed in the vertical direction, and if the movement amount in the y direction is set to 0, cyclic movement is performed in the horizontal direction.

Next, an example in which an address in a certain rectangle is scrolled in an oblique direction by using an address conversion circuit that circulates in an oblique direction will be described with reference to FIGS. 65, 66 and 67. In FIG. 65, reference numeral 6501 denotes a video RAM, whose display start address is SA, display width is W, height is H, (px, py) on the video RAM is coordinates of the upper left corner, and width p is
w, height ph rectangular area _6502, a part of the image drawn in the shape of a rice paddle "aiue" shown in 6503, rectangular area _650
Suppose that it is displayed in 2. In Fig. 65, the area _65 drawn as "A"
04 is displayed in the rectangular area_6502. Then sx sideways
A horizontal pw-sx and a vertical ph-pw line area on the lower right side of the rectangular area _6504 drawn by scrolling pix pixels by sy pixels vertically The width pw-sx and height sy lines on the upper right side of the drawn rectangular area _6505 and the width s on the lower left side of the rectangular area _6506 drawn on the right as "i"
The area for x, height ph-sy lines and the rectangular area _6507 drawn diagonally to the lower right with "e" on the upper right side should be displayed for the area of sx, height sy lines think of.

First, when the contents of the address conversion database are set as follows, the display of the rectangular area_6502 circulates by sx in the x direction and sy in the y direction as shown in FIG.
Rectangular area _66 of width sx and height ph-sy lines on the upper right side of 6502
01 displays the lower left width sx and height ph-sy lines of “A”, and the lower left width pw-sx and height sx lines of rectangular area_6502 of rectangular area_6502 Upper right side width pw-sx, height sy
The line is displayed, and the width sx on the lower right side of the rectangular area_6502,
In the rectangular area_6603 for the height sy line, the upper left width sx and the height sy line of “A” are displayed.

(1) Display start address SA (2) Display width W (3) Display height H (4) Coordinates of upper left corner of rectangle P (px, py) (5) Height ph of rectangle P (6) The width of the rectangle P pw (7) The amount of movement in the y direction sy (8) The amount of movement in the x direction sx Next, as shown in FIG. 67, “I” in the display image_6503
The area _6701 for the lower left width sx and height ph-sy lines of the area _6506 is drawn in the rectangular area _6601 and the area _6505 drawn as “U” in the display image _6503 Upper right width
ph-sx, height sy lines area_6702 contents of rectangular area_
Area drawn with 6602 and displayed as _ in the display image _6503_Area _67 for the upper left width sx and height sy lines_6507 of the area _67
If you draw the contents of 03 in the rectangular area_6603, you can get the desired display.

On the other hand, when such a display change is performed by a conventional information processing apparatus, it is necessary to rewrite all of the rectangular area_6502.

In the above, a device for circulating the address of an arbitrary rectangular area in an oblique direction has been described. However, this apparatus can be extended to circulate the address of a plurality of rectangular areas. For example, m (positive integer) rectangular areas P
The address translation database_0101 is extended so that the contents shown in FIG. 68 can be written, and the address translation circuit_0102 is changed to FIG.
Address conversion is performed according to the flowchart of 9. The contents of the address conversion database shown in FIG. 68 include a display start address SA, a display screen width W, a height H, and an address conversion required for obtaining a correspondence between an address and a coordinate. Corner coordinates (px1, py
1), (px2, py2), ..., (pxm, pym) and the width of each rectangular area
pw1, pw2, ..., pwm, height ph1, ph2, ..., phm and the movement amount sy1, sy2, ..., sym of the circular movement in the y direction of the specified rectangular area
The movement amounts sx1, sx2,..., sxm of the circulating movement in the x direction.

The address conversion circuit_0102 performs address conversion by referring to the contents of the address conversion database_0101 shown in FIG. This procedure will be described with reference to the flowchart in FIG. First, in step _6901, (px1, py
1) is associated with (px, py), pw1 is associated with pw, ph1 is associated with ph, sy1 is associated with sy, and sx1 is associated with sx, and address conversion is performed according to the flowchart of FIG. In step _6902, (px2, py2)
(Px, py), pw2 corresponds to pw, ph2 corresponds to pqh, sy2 corresponds to sy, and sx2 corresponds to sx.
The address converted in 6901 is further converted. In this way, the process of converting the address converted in each step in the next step is sequentially performed, and in step _690m,
(pxm, pym) is (px, py), pwm is pw, phm is ph, sym is sy, sxm
Is made to correspond to sx, and the address converted in step_690m-1 is further converted according to the flowchart of FIG.
As described above, the address conversion circuit_0102 outputs an address that has been converted by m stages in steps _6901 to _690m.

[0110]

According to the information apparatus of the present invention, when data in the video RAM is moved, there is provided a means for exchanging the address of the image data to be moved with the destination address. There is no need to rewrite the contents of the video RAM to do so. This reduces access to the video RAM due to multi-window display, scrolling, panning, redrawing, animation display, moving the window, and other changes in the display position that are frequently used in graphical user interface displays. It is possible to display image data at high speed,
Display contents can be changed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an information processing apparatus according to an embodiment of the present invention.

FIG. 2 is a memory map showing the correspondence between VRAM addresses and display coordinates.

FIG. 3 is an explanatory diagram of two rectangular areas having no common part to be exchanged.

FIG. 4 is a database used for exchanging addresses of two rectangular areas having no common part.

FIG. 5 is a flowchart of address exchange of two rectangular areas having no common part.

FIG. 6 is a diagram showing correspondence between addresses and coordinates when address conversion is not performed.

FIG. 7 is a diagram showing the correspondence between addresses and coordinates after address exchange.

FIG. 8 is a diagram showing correspondence between addresses and coordinates of a VRAM having a non-display area before address conversion.

FIG. 9 is a diagram showing correspondence between addresses and coordinates after address conversion of a VRAM having a non-display area.

FIG. 10 is an explanatory diagram of a button press animation by replacing a rectangular area using a non-display area (normal state).

FIG. 11 is an explanatory diagram of a button press animation by a rectangular area exchange using a non-display area (pressed state).

FIG. 12 is an explanatory diagram 1 of an animation by rectangular area exchange using a non-display area.

FIG. 13 is an explanatory diagram of animation by rectangular area exchange using a non-display area.

FIG. 14 is a diagram illustrating an animation by exchanging a rectangular area using a non-display area.

FIG. 15 is an explanatory diagram 4 of an animation by rectangular area exchange using a non-display area.

FIG. 16 is an explanatory diagram 5 of an animation by rectangular area exchange using a non-display area.

FIG. 17 is an explanatory diagram 1 of scrolling by rectangular area exchange using a non-display area.

FIG. 18 is a diagram illustrating scrolling by rectangular area exchange using a non-display area.

FIG. 19 is a diagram illustrating scrolling by rectangular area exchange using a non-display area.

FIG. 20 is an explanatory view of scrolling by rectangular area exchange using a non-display area.

FIG. 21 is an explanatory diagram 1 of panning by exchanging a rectangular area using a non-display area.

FIG. 22 is an explanatory diagram 2 of panning by exchanging a rectangular area using a non-display area.

FIG. 23 is a diagram illustrating scrolling in an oblique direction by exchanging a rectangular area using a non-display area.

FIG. 24 is a diagram illustrating scrolling in a diagonal direction by exchanging a rectangular area using a non-display area.

FIG. 25 is an explanatory view 1 of drawing and erasing a window by exchanging a rectangular area using a non-display area.

FIG. 26 is an explanatory diagram 2 of drawing and erasing a window by exchanging a rectangular area using a non-display area.

FIG. 27 is an explanatory diagram of window movement by rectangular area exchange using a non-display area.

FIG. 28 is an explanatory diagram of window movement by rectangular area exchange using a non-display area.

FIG. 29 is a database used for exchanging addresses of three sets of rectangular areas.

FIG. 30 is a flowchart of address exchange of three sets of rectangular areas.

FIG. 31 is an explanatory diagram 1 of a multi-window display by exchanging a rectangular area using a non-display area.

FIG. 32 is an explanatory view of a multi-window display by exchanging a rectangular area using a non-display area.

FIG. 33 is an explanatory view 3 of a multi-window display by exchanging a rectangular area using a non-display area.

FIG. 34 is an explanatory view 4 of a multi-window display by exchanging a rectangular area using a non-display area.

FIG. 35 is a database used for exchanging addresses of n (positive integer) sets of rectangular areas.

FIG. 36 is a flowchart of address exchange of n (positive integer) sets of rectangular areas.

FIG. 37 is an explanatory diagram of two rectangular areas having a common part to be exchanged.

FIG. 38 is an explanatory diagram of address exchange of a rectangular area having a common part.

FIG. 39 is a flowchart of address exchange of a rectangular area having a common part.

FIG. 40 is an explanatory diagram 1 of window movement by rectangular area exchange without using a non-display area.

FIG. 41 is an explanatory diagram of window movement by rectangular area exchange without using a non-display area.

FIG. 42 is an explanatory diagram of window movement by rectangular area exchange without using a non-display area.

FIG. 43 is an explanatory diagram of window movement by rectangular area exchange without using a non-display area.

FIG. 44 is an explanatory diagram of window movement by rectangular area exchange without using a non-display area.

FIG. 45 is an explanatory diagram of window movement by rectangular area exchange without using a non-display area.

FIG. 46 is an explanatory diagram of cyclic movement of addresses in a rectangular area in the vertical direction.

FIG. 47 is a database used for cyclically moving addresses in a rectangular area in the vertical direction.

FIG. 48 is a flowchart for circulating addresses in a rectangular area in the vertical direction.

FIG. 49 is an explanatory diagram 1 of scrolling by circulating a rectangular area without using a non-display area.

FIG. 50 is an explanatory diagram 2 of scrolling by circulating a rectangular area that does not use a non-display area.

FIG. 51 is an explanatory diagram 3 of scrolling by circular movement of a rectangular area not using a non-display area.

FIG. 52 is a database used for vertically circulating the addresses of m (positive integers) rectangular areas;

FIG. 53 is a flowchart of circulating addresses of m (positive integer) rectangular areas in the vertical direction.

FIG. 54 is an explanatory diagram of a circular movement of addresses in a rectangular area in the horizontal direction.

FIG. 55 is a database used for circulating addresses in a rectangular area in the horizontal direction.

FIG. 56 is a flowchart of circulating addresses in a rectangular area in the horizontal direction.

FIG. 57 is an explanatory diagram 1 of panning by circulating a rectangular area that does not use a non-display area.

FIG. 58 is an explanatory diagram of panning by circulating a rectangular area that does not use a non-display area.

FIG. 59 is an explanatory diagram 3 of panning by circulating a rectangular area that does not use a non-display area.

FIG. 60 is a database used for horizontally circulating addresses of m (positive integer) rectangular areas;

FIG. 61 is a flowchart of circulating the addresses of m (positive integer) rectangular areas in the horizontal direction.

FIG. 62 is an explanatory diagram of circular movement of addresses in a rectangular area in an oblique direction.

FIG. 63 is a database used for circularly moving addresses in a rectangular area in an oblique direction.

FIG. 64 is a flowchart of circulating addresses in a rectangular area in an oblique direction.

FIG. 65 is an explanatory diagram 1 of scrolling in a diagonal direction by circulating a rectangular area that does not use a non-display area.

FIG. 66 is a diagram illustrating scrolling in a diagonal direction by circulating a rectangular area that does not use a non-display area.

FIG. 67 is an explanatory view 3 of a scroll in a diagonal direction by circulating a rectangular area that does not use a non-display area.

FIG. 68 is a database used for circularly moving addresses of m (positive integer) rectangular areas in an oblique direction;

FIG. 69 is a flowchart of circulating and moving diagonally the addresses of m (positive integers) rectangular areas;

FIG. 70: Address exchange of n (positive integer) pairs of rectangular areas and m
Database used to move the addresses of (positive integer) rectangular areas in any direction.

FIG. 71 is a flowchart of exchanging addresses of n (positive integer) sets of rectangular areas and circulating addresses of m (positive integers) of rectangular areas in an arbitrary direction;

FIG. 72 is a block diagram showing a configuration of a conventional information processing apparatus.

[Explanation of symbols]

 9901 ・ ・ ・ CPU 9902 ・ ・ ・ Data input section 9903 ・ ・ ・ Memory 9904 ・ ・ ・ Video RAM 9905 ・ ・ ・ Address bus 9906 ・ ・ ・ Address selector 9907 ・ ・ ・ Data bus 9908 ・ ・ ・ Data selector 9909 ... Display control unit 9910 Display 0101 Address conversion database 0102 Address conversion circuit

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification code FI G09G 5/36 530 G09G 5/36 530G 5/38 5/38 A (72) Inventor Isao Takida 1099 Ozenji Ozenji, Aso-ku, Kawasaki City, Kanagawa Prefecture Address: Hitachi, Ltd., System Development Laboratory (72) Inventor Toru Owada 1099, Ozenji, Aso-ku, Kawasaki, Kanagawa Prefecture, Japan Hitachi, Ltd. System Development Laboratory (72) Inventor, Tetsuo Takagi Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa 292 Hitachi Microware Systems Co., Ltd. (72) Inventor Akira Kikuchi 5-2-1, Kamimizuhonmachi, Kodaira-shi, Tokyo Semiconductor Company, Hitachi, Ltd.

Claims (4)

[Claims] 1. A memory for storing data, a drawing unit for writing display data to the memory, a display control unit for sequentially and periodically reading the display data written to the memory, and supplying the display data to a display device; An address translation circuit that translates addresses supplied to the memory, and an address translation database that holds an address translation rule, wherein the address translation circuit changes addresses of a plurality of rectangular areas in the display data of the memory. An information processing apparatus for moving a display position of rectangular data. 2. The information processing apparatus according to claim 1, wherein the changing of the addresses of the plurality of rectangular areas in the address conversion circuit is replacing the addresses of the respective rectangular areas. apparatus. 3. The information processing apparatus according to claim 2, wherein exchanging the addresses of the plurality of rectangular areas in the address conversion circuit is exchanging the addresses so as to circulate in a predetermined direction. An information processing apparatus characterized by the above-mentioned. 4. The information processing apparatus according to claim 1, wherein changing the addresses of the plurality of rectangular areas in the address conversion circuit includes replacing the addresses and
An information processing apparatus characterized in that addresses are exchanged so as to circulate in a predetermined direction.