JPS59182493A - Character generation system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a character generation method for a character display device used as an input/output device of an electronic computer.

FIG. 1 is a block diagram of a conventional character display device. In FIG. 1, (1) is a timing generator that generates display timing, (2) is a memory that stores display data in code, and (3) is a character generator that converts display codes into character patterns.

Next, the operation will be explained. The timing generator (1) generates a memory address signal (
MA) and row address signal (RA).

In the memory (2), according to the memory address signal (MA) supplied from the timing generator (1),
Generates a character code corresponding to the screen display position. The character generator (3) generates a specific row pattern of a specific character according to the row address signal (RA) supplied from the timing generator (1) and the character code supplied from the memory (2).

FIG. 2 shows the correspondence between the contents of the character generator (3) and the characters displayed on the screen. In order to simplify the explanation, it is assumed that one character range is 7 dots horizontally x 16 dots vertically, and the size of the character pattern is 5 dots horizontally x 7 dots vertically. In this case, the size of the character generator (3) only needs to be 5 dots horizontally x 7 dots vertically, and it is necessary to output a pattern only at row addresses 4 to 10. Incidentally, there are cases where it is necessary to display vertical lines as a character pattern as a tabulation function of a display device. In this case, the vertical lines are connected to the upper and lower character display positions and used as a frame for the table, so if all 16 vertical dots are not displayed, the lines will be interrupted. Therefore, if there is a vertical line for tabulation, the size of the character generator (3) is 5 horizontally as shown in Figure 6.
Dots x 16 vertical dots are required.

Therefore, in order to display the table vertical m with the conventional circuit configuration, it is necessary to use a character with the same number of vertical dots as the character range.
This has the serious disadvantage of requiring a generator and increasing the capacity of the character generator.

This invention was made to eliminate this drawback, and by supplying the same row φ address to the character generator multiple times, the increase in the capacity of the character generator due to the addition of vertical lines can be minimized. It provides a character generation method.

Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. Fig. 4 shows an embodiment of the present invention, and (4) is an address converter for converting a row address. Other parts with the same reference numerals as in FIG. 1 are the same parts as shown in FIG. 1, respectively.

The conversion contents of the address converter (4) are as shown in FIG. 5, and when the row address is from 1 to 6, 6 is output,
When the row address is from 11 to 16, 11 is output. Therefore, in the vertical direction of the character generator (3), 9 dots from row addresses 6 to 11 are sufficient, and in the screen display, 6 is copied to row addresses 1 and 2, and 11 is copied to row addresses 12 and 16. is copied. FIG. 6 shows the correspondence between the contents of the character generator (3) and the characters displayed on the screen in an embodiment of the present invention. (a) is the case where characters start to be displayed, and the row
Addresses 1, 2, 12, and 16 are blank. In addition, (b) shows a case where vertical lines for tabulation are displayed), vertical lines are also displayed at row addresses 1, 2, 12, and 13.

That is, a display code is generated by supplying the same row address to the character generator (3) multiple times while displaying one line on the display screen.

In the embodiment described above, the character range is 7 dots wide x 16 dots high, and the character pattern size is 5 dots wide x 7 dots high, but the invention is not limited to this. Also, although the vertical lines are used for tabulation, it goes without saying that the purpose of using the vertical lines does not depend on the purpose.

As described above, according to the character generation method of the present invention, the same row address is supplied to the character generator multiple times, thereby minimizing the increase in the capacity of the character generator due to the addition of vertical lines. It has an excellent effect that can be suppressed.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of a conventional character display device, Figure 2 is an explanatory diagram showing the correspondence between a character generator and screen display in a conventional configuration, and Figure 3 is a vertical line for plotting in a conventional configuration. FIG. 4 is a diagram showing the configuration of a character display device according to an embodiment of the present invention, and FIG. 5 is an explanation showing the conversion contents of an address converter. 6 are explanatory diagrams showing the correspondence between the character generator and the screen display in one embodiment of the present invention. In the figure, (1) is a timing generator, (2) is a memory, (3) is a character generator, and (4) is an address converter. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Daikeito Oiwa Masuo Figure 1 Figure 2 Mouth ~ Character Ji'Kouomu'7 Watering Komaba Shiko - Figure 3 Figure 6: Proboscis

Claims (1)

[Claims] In the character generation method of a character display device that has a character generator and is used for input/output devices of electronic computers by displaying character symbols, etc., when one line is displayed on the display screen, the character generator A character generation method characterized in that a display signal is generated by supplying the same row address multiple times.