JPH01173224A - Peripheral controller - Google Patents

Abstract

PURPOSE:To reduce the load on a higher-order device due to the difference of character code by providing a code converting means which converts the character code, which the higher-order device transfers, to a character code determined on the peripheral device side. CONSTITUTION:A code conversion part 11 having a code correspondence table is provided, and codes of characters, symbols, etc., corresponding to character codes prescribed by a peripheral device 2 are stored in this table in the order of handling in a higher-order device 3. When receiving the indication of display on a display device 21 and the code of a character to be displayed from the higher-order device 3, a peripheral controller 1 reads out the code stored in a corresponding address by the code converting part 11 having the code correspondence table and uses it as a parameter to instruct the peripheral device 2 to display the character on the display device 21. Thus, an operating system and software are developed without paying attention to the difference of character code.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a peripheral control device, and particularly to a peripheral control device used when the peripheral device to be controlled is equipped with a display.

Margins below [Prior Art] Conventionally, this type of peripheral control device has displayed characters on a display by directly transmitting character codes transferred from a host device to the peripheral device.

[Problem that the invention seeks to solve]

The conventional peripheral control device described above transfers the character code transferred from the host device to the peripheral device as is, so the character code specified in the specifications of the peripheral device is the same as the character code used by the operating system of the host device. If they do not match, the host device's operating system or software must prepare a character code that matches the specifications of the peripheral device, leading to a decrease in software development efficiency.

Furthermore, even if peripheral control devices are for various host devices with different architectures, peripheral devices with the same specifications are often connected, and the character code used by the host device and the character code of the peripheral device do not match. There was a problem in that this situation occurred.

The peripheral control device of the present invention is an attempt to solve the above-mentioned problems of the conventional device, and is intended to provide a peripheral control device that reduces the burden on the host device due to the difference in character codes.

[Means for solving problems]

The peripheral control device of the present invention is a peripheral control device that controls the operation of a peripheral device including a display capable of displaying characters of a code specified by a host device, wherein the host device displays the characters of a code specified by the host device on the display of the peripheral device. The peripheral device is configured to include code conversion means for converting the character code transferred to the peripheral device into a character code determined by the peripheral device.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a diagram showing the configuration of an embodiment of a peripheral control device of the present invention. In the figure, 1 is a peripheral control device, 2 is a peripheral device, 3 is a host device, and 11 is a code conversion unit.

12 is a control unit that controls the operation of the peripheral control device.

13 is an I10 processing unit that performs input/output control between the peripheral device 2 and the peripheral control device 1, and 21 is a display included in the peripheral device. Note that the code conversion unit 11 converts characters corresponding to the character codes defined in the peripheral device 2 in the order of the character codes handled by the host device 3.

It has a code correspondence table in which codes such as symbols are stored.

When the peripheral control device 1 receives an instruction to display on the display 21 and the code of the character to be displayed from the host device 3, the code conversion means 11 having a code correspondence table reads out the code stored at the corresponding address and converts the code. Display 21 for peripheral device 2 with
Instruct the display to be displayed.

FIG. 2 is a diagram showing the configuration of another embodiment of the present invention.

The difference from the device shown in FIG. 1 is that the code converter 41 of the peripheral control device 4 has two code correspondence tables 411 and 412, and selects one of these two code correspondence tables. It is provided with a selector 42.

When the host device 3 instructs the peripheral control device 4 to display it on the display 21, it notifies the type of character code to be transferred by using a different command code or the like. According to this instruction, the peripheral control device 1 selects the code correspondence table 411 or 412 of the corresponding character code using the selector 14, converts the character code using this code correspondence table, and displays it on the display 21 for the peripheral device 2. instruct.

〔Effect of the invention〕

As explained above, by providing two peripheral control devices with code conversion means, the present invention makes it possible to make it possible to be aware of differences in character codes even when peripheral devices with the same specifications are connected to host devices with different architectures. This has the effect of making it easier to develop operating systems and software.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an embodiment of the peripheral control device of the present invention, and FIG. 2 is a diagram showing the configuration of an embodiment of the peripheral control device according to the present invention, and FIG. It is a figure showing the composition of other examples of the present invention. Explanation of symbols: 1--Peripheral control device, 2--Peripheral device. 3... Host device, 4... Peripheral control device, 11...
Code conversion unit, 12... Control unit, 13... I10 processing unit, 21... Disk storage. 41... Code converter, 42... Selector, 411
゜412...Code correspondence table. Figure 1 Figure 2 r 12- ■ Yo.ー, 1 ”°゛@” − ■ ■ 1 Selector 1 self-choking bar ■ Akira.

Claims (1)

[Claims] 1. In a peripheral control device that controls the operation of a peripheral device that is equipped with a display capable of displaying characters of a code specified by a host device, characters transferred by the host device to be displayed on the display of the peripheral device. A peripheral control device comprising code conversion means for converting a code into a character code determined by the peripheral device.