Computer system which can operate in a plurality of display mode

Details Computer system which can operate in a plurality of display mode Computer system which can operate in a plurality of display mode

1989-01-27

1991-12-10

Herndon, Heather R.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

34082532, 395700, G06F 1562

Patent

active

050724118

ABSTRACT:
A computer system is provided which can be initialized in a condition to operate with one of a plurality of types of display controllers and display modes. The computer system includes a built-in display controller, a switch for enabling use of either the built-in display controller or an optional display controller, a random access memory (RAM) for storing setup data of the system, and a basic input/output system program (hereinafter system BIOS) for actuating the computer system in a condition to operate with a display controller to be selected by the user. The built-in display controller includes a read only memory (ROM) in which an identifier information is written. The system BIOS discriminates the type of the display controller which has been selected by the user by detecting whether or not the identifier information can be read. At least one optional display controller can be connected to the computer system.

REFERENCES:
patent: 4639721 (1987-01-01), Eto et al.
patent: 4646077 (1987-02-01), Culley
patent: 4792918 (1988-12-01), Hirase et al.

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