Processor having plural initial loading programs for loading dif

Details Processor having plural initial loading programs for loading dif Processor having plural initial loading programs for loading dif

1986-02-10

1986-12-02

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 940, G06F 1300

Patent

active

046269860

ABSTRACT:
An information processor with a read only memory ROM stores a plurality of initial program loader (IPL) programs. The ROM memory has address inputs divided into two parts used to access each IPL program. One part of the address inputs of the ROM memory is connected to an address bus from a central processing unit (CPU) in order to be used to access the contents of one of the programs. The other part of the address inputs of said ROM memory is connected to an IPL setting part or switching which sets or selects a desired one of said plurality of IPL programs. The IPL setting part includes a plurality of switches connected to upper bit terminals of the ROM address inputs.

REFERENCES:
patent: 4135240 (1979-01-01), Ritchie
patent: 4164786 (1979-08-01), Gollomp
patent: 4167781 (1979-09-01), Beccia et al.
patent: 4200930 (1980-04-01), Rawlings et al.
patent: 4253148 (1981-02-01), Johnson et al.
patent: 4282572 (1981-08-01), Moore, III et al.
patent: 4325118 (1982-04-01), DeVita et al.

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