System for selecting control parameter for microinstruction exec

Details System for selecting control parameter for microinstruction exec System for selecting control parameter for microinstruction exec

1989-12-26

1993-06-15

Lee, Thomas C.

Boots, shoes, and leggings

364258, 364259, 3642612, 3642628, 3642613, 364938, 3649466, 3649444, 3649467, 364DIG1, 395800, G06F 922, G06F 930

Patent

active

052206564

ABSTRACT:
A device and method for generating execution controlling information (operation designating parameter) for an instruction execution means is provided. The device operates by selecting and composing a parameter (bit field) selected from among the bits of an instruction code and a parameter obtained as a result of decoding the instruction to be executed. The process makes it possible to reduce the size of a micro ROM by processing one instruction having various formats by the same micro-instruction.

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patent: 4589067 (1986-05-01), Porter et al.
patent: 4763246 (1988-08-01), Holt et al.
patent: 4870567 (1989-09-01), Kitamura et al.
patent: 4945511 (1990-07-01), Itomitsu et al.
Sakamura (ed.), "Tron Project 1987--Open-Architecture Computer Systems" Proc. 3rd Tron Proj. Symposium, Springer-Verlag, Tokyo (1987).

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