Buffer system for supply procedure words to a central processor

Details Buffer system for supply procedure words to a central processor Buffer system for supply procedure words to a central processor

1980-04-15

1982-09-14

Springborn, Harvey E.

Boots, shoes, and leggings

G06F 300, G06F 1300

Patent

active

043498744

ABSTRACT:
In a data processing system, a central processor unit requests procedural data words or non-procedural data words stored in the system memory. A control store device executes firmware instructions including a local bus field for controlling the transfer of the requested procedural data words and non-procedural data words to the central processor unit. The requested procedural data words and non-procedural data words are transferred to the central processing unit by an interfacing device including a data bus latch for receiving the procedural data words and non-procedural data words transferred from the memory, a prefetch buffer for storing up to four words, a first set of OR gate circuits for selectively transferring the procedural data words stored in the prefetch buffer to a procedural data multiplexer for assembling either a procedural data word or a procedure address, and a second set of OR gate circuits for selectively transferring either a procedural data word or non-procedural data word to the source bus or a procedural data address or non-procedural data address to the source bus for transfer to the central processor unit.

REFERENCES:
patent: 3766532 (1973-10-01), Liebel, Jr.
patent: 3839705 (1974-10-01), Davis et al.
patent: 4161024 (1979-07-01), Joyce et al.
patent: 4168523 (1979-09-01), Chari et al.
patent: 4195343 (1980-03-01), Joyce

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