Boots – shoes – and leggings
Patent
1988-06-10
1990-06-12
Eng, David Y.
Boots, shoes, and leggings
3642613, 3642617, 3642624, 3642628, G06F 922, G06F 930, G06F 938
Patent
active
049338412
ABSTRACT:
A microcode reading control system in an information processing system wherein a machine instruction is divided into microcode instructions as a plurality of steps, each step is further divided into a plurality of stages, and the stages of the microcode instructions are processed in parallel with advanced retrieval control, a first aspect of which provides duplexed control storages storing the microcode instructions read in at a first step of the machine instruction, one of the control storages being read only at the first step of a branch target machine instruction of a branch machine instruction, and a second aspect of which provides a first control storage storing microcode instructions to control the first steps of the machine instructions and a second control storage storing microcode instruction to control the second steps and thereafter of the machine instructions, the first control storage reading the stored microcode instruction at the second stage of the first step of the machine instruction, and the second control storage reading at the first stage of the second step and thereafter of the machine instructions. Thus, in a processing of the branch machine instruction, the control can be accelerated.
REFERENCES:
patent: 4112489 (1978-09-01), Wood
patent: 4179737 (1979-12-01), Kim
patent: 4200927 (1980-04-01), Hughes et al.
patent: 4594659 (1986-06-01), Guenthner et al.
patent: 4597044 (1986-06-01), Circello
patent: 4691277 (1987-09-01), Kronstadt et al.
patent: 4757445 (1988-07-01), Zolnowsky et al.
Mori Tsuyoshi
Okada Seishi
Eng David Y.
Fujitsu Limited
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