JPS60231236A - Data device - Google Patents

Abstract

PURPOSE:To attain proper display for plural input means and display means through a single conversion means by outputting respective graphic codes corresponding to the plural input means from a storage means so as to be separated each other with time division. CONSTITUTION:A character address ad2 inputted from four input devices and outputted from a CRT controller 3 is inputted to CRT memories 4-7 corresponding to respective input devices and then inputted to a character generator 8 at the timings corresponding to clock pulses CK-1-CK-4. The output of the generator 8 is loaded to shift registers 9-12 at timings corresponding to the clock pulses CK-1-CK-4 and outputted as serial data synchronously with the clocks. The serial data are sent to a CRT as video data together with a horizontally and vertically synchronizing signal SYNC to outputted from the controller 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a data device in which outputs from a plurality of input means such as a keyboard are displayed on a plurality of display means such as C1(·T).

[Prior art]

Conventionally, when displaying characters using a display device such as C) LT l shown in Fig. 1, dot data of that character is output according to a character code input from an input device such as a keyboard 2. A data device with a character generator is used. This character generator requires a very large amount of data; for example, when displaying JIS level 1 kanji with 16 vertical and horizontal dots, 1 megabit of data is required, and it generally consists of four 256-byte mask ROMs. Therefore, it is expensive and occupies a large area on the substrate.

Therefore, in conventional technology in which one character generator is provided for one display device, when displaying using multiple input devices and multiple display devices, the entire device naturally becomes larger. It had the disadvantage that it was not very simple and was expensive.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned drawbacks, and is achieved by outputting graphical codes corresponding to the outputs of a plurality of input means temporally separated from each other from the storage means.
It is an object of the present invention to provide a small and inexpensive data device that can properly display a plurality of input means and display means using a single conversion means.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 2 to 5.

In each figure, 8 is a CRT controller, horizontal synchronization,
Along with the vertical synchronizing signal 5YNC, a scan address ad and character address ad2 as shown in + and (01) are output as shown in FIG. C as a means
In the RT memory, each address terminal AI) has the above-mentioned C
When the character address ad2 output from the RT controller 8 is input, each output enable OE terminal receives a clock pulse CK-1 as shown in FIG. 4 (A), (B), and (C).

CK-2Nl and CK-4(hen) are input. The character address ad2 represents the position of the character on the display screen, and the scan address ad represents the constituent parts of the character as shown in FIG.

For example, the address "0" of this scan address ad.
corresponds to the data at the top of the character.

8 is a character generator as a conversion means, and the C
Scan AT l with multiple outputs from RT controller 3
, zs ad, and C1-LT memory +41. (5),
+61° (7) 9 to 24 depending on the data output
It is designed to be output as book dot data. 9
゜10, l l, 12 are shift registers as output means, which input the parallel input from the character generator 8 at the low level of the load terminal LD,
It is output as serial data in synchronization with the clock input to the clock terminal CK.

In the display data output device having the above configuration, the character address ad2 inputted by the four input devices and outputted from the C)LT controller l is stored in the C)tT memory 2, which corresponds to each input device. a, 4.5, and then input to the character generator 8 at a timing corresponding to the clock pulse shown in FIG. This clock pulse CK-1(to)), CK-2H, CK-
1 (to) and CK-4 (to) are arranged so that they do not overlap with each other for one character address ad2.

Therefore, when the clock pulse CK-IN) is LowO, C
)t, the output of the T memory 4 is input to the character generator 8, and at this time, the output of the other C'li T memory 5゜6.7
There is no output from. And character generator 8
The output of clock pulse CK-1 is sent to shift register 9.
Serial data is loaded at the timing of 0) and input to the clock terminal CK -Special-→4 and a half in synchronization with the i clock. This serial data is the CRT controller 3
It is sent to C1 (, T) as video data together with horizontal and vertical synchronization signals 8YNC output by

Further, the outputs from the CRT memories 5, 6.7 are respectively sent to the character generator 8 clock CK-2.

In response to the Low signals to CK-3 (to) and CK-4, the serial data is sequentially input to shift registers 10 and 11.12, and serial data is output from these shift registers 10 and 11.12.

Furthermore, the access time eT of the character generator 8
t and −character display time f T 2 , then
Generally, T2>>T, but in order to display using a single character generator 8 for four input means and display means as in the above embodiment, "2/T+>4
That's fine.

Further, in the above embodiment, inputs from four input means are displayed on four display means by using a single conversion means in a time-sharing manner. It goes without saying that the present invention is not limited to the case where the means and the display means are used, but can also be applied to the case where the input means and the display means for inputting the number of weights are used.

〔Effect of the invention〕

As explained above, the data device of the present invention is configured to output each graphic code corresponding to the output of the plurality of input means temporally separated from the storage means. On the other hand, it is possible to perform proper display using a single conversion means, which has the effect of reducing the size and cost of the device.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing input means and display means, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 (A)
Figure 4 (b) shows the scan address, Figure 4 (b) shows the character address, and Figure 4 (a) shows the clock pulse CK.
-1, the figure (b) shows clock pulses C, K -
2 (f), the same figure (c) shows the clock pulse CK-
Figure 3 (to) shows clock pulse CK-4.
6N), and FIG. 5 is a diagram showing the characters represented by the character address. l Keyboard as input means, 2... CRT memory as output means, 8... Character generator as conversion means, 9, 10, 11.12... Shift register as output means. Applicant name Tokyo Heavy Equipment Industry Co., Ltd.

Claims (1)

[Claims] A data device configured to output predetermined display data to display means corresponding to each of the input means based on input from a plurality of input means, the data device outputting each graphic code according to the output of each of the input means. storage means for outputting the dot patterns temporally separated from each other; a single conversion means for outputting dot patterns according to each of the graphic codes; and output of the conversion means for outputting dot patterns as predetermined display data to each of the display means. A data device comprising an output means.