Dual fetch microsequencer

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G06F 918

Type

Patent

Status

active

Patent number

044398271

Description

ABSTRACT:
A dual fetch microsequencer having two single-ported microprogram memories wherein both the sequential and jump address microinstructions of a binary conditional branch can be simultaneously prefetched, one from each memory. The microprogram is assembled so that the sequential and jump addresses of each branch have opposite odd/even polarities. Accordingly, with all odd addresses in one memory and even in the other, the first instruction of both possible paths can always be prefetched simultaneously. When a conditional branch microinstruction is loaded into the execution register, its jump address or a value corresponding to it is transferred to the address register for the appropriate microprogram memory. The address of the microinstruction in the execution register is incremented and transferred to the address register of the other microprogram memory. Prefetch delays are thereby reduced. Also, when a valid conditional jump address is not provided, that microprogram memory may be transparently overlayed during that microcycle.

REFERENCES:
patent: 3573853 (1971-04-01), Watson et al.
patent: 3764988 (1973-10-01), Onishi
patent: 3771138 (1973-11-01), Celtruda et al.
patent: 3771141 (1973-11-01), Culler
patent: 3812473 (1974-05-01), Tucker
patent: 3940741 (1976-02-01), Horikoshi et al.
patent: 4050058 (1977-09-01), Garlic
patent: 4062058 (1977-12-01), Haynes
patent: 4110822 (1978-08-01), Porter et al.
patent: 4124891 (1978-11-01), Weller et al.
patent: 4145736 (1979-03-01), Yamada et al.
patent: 4156925 (1979-05-01), Tutt et al.
patent: 4200927 (1980-04-01), Hughes et al.
patent: 4236210 (1980-11-01), Terakawa et al.
patent: 4338661 (1982-07-01), Tredennick et al.
patent: 4373180 (1983-02-01), Linde

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