Browse Prior Art Database

Display Terminal

IP.com Disclosure Number: IPCOM000034489D
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Fujimura, M: AUTHOR [+4]

Abstract

Disclosed is a display station attached to a read-only memory wherein program modules are stored in the read-only memory in compressed form, the program modules selected from the read-only memory are decompressed and stored in a random-access memory, and the operations of the display terminal are performed by accessing the program modules stored in the random-access memory. Referring to the figure, the read-only memory (ROM) card is attached to the display terminal which includes the random-access memory (RAM) and a keyboard. The ROM stores various program modules M1, M2, ..., Mn and an address conversion program module. All the program modules are stored in compressed form. When the display terminal is powered on, a set-up program which is set by an user specifies the program modules to be fetched from the ROM.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 79% of the total text.

Page 1 of 2

Display Terminal

Disclosed is a display station attached to a read-only memory wherein program modules are stored in the read-only memory in compressed form, the program modules selected from the read-only memory are decompressed and stored in a random-access memory, and the operations of the display terminal are performed by accessing the program modules stored in the random-access memory. Referring to the figure, the read-only memory (ROM) card is attached to the display terminal which includes the random-access memory (RAM) and a keyboard. The ROM stores various program modules M1, M2, ..., Mn and an address conversion program module. All the program modules are stored in compressed form. When the display terminal is powered on, a set-up program which is set by an user specifies the program modules to be fetched from the ROM. It is assumed that the program modules M1, M3, M5 and M8 and the address conversion program module are selected. A load control routine fetches the compressed program modules M1, M3, M5 and M8 and the address conversion module in accordance with the specification from the set-up program, decompresses these modules, and stores them in respective locations of the RAM, as shown in the figure. An external control unit or the keyboard supplies patch control data including module N0, addresses and data to a patch program. The patch program performs the patch function in accordance with the patch control data. In the exemplary case, the patch op...