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IBM Personal Computer-Based Automotive Electronic Diagnostic Character Set Disclosure Number: IPCOM000062172D
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09

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Kurtz, H Ballou, R Boscove, J Bou-Ghannam, A [+details]


This article describes a method of modifying the character generator read-only memory (ROM) of the color graphics adapter in an IBM personal computer (PC) in order to implement special character symbols used in automotive applications. Once encoded into ROM these special symbols can be accessed in the alphanumeric mode similar to a standard ASCII character. Thus, a typical automotive repair manual page can be edited and displayed on the IBM PC-based automotive terminal using editor programs such as the IBM PC Personal Editor without the need to generate such a screen in the graphics all-points-addressable mode. This has the effect of greatly reducing the amount of storage and time required to generate such a screen.