G - Physics – 06 – F
Patent
G - Physics
06
F
354/230.71
G06F 9/22 (2006.01) G06F 9/26 (2006.01) G06F 9/38 (2006.01)
Patent
CA 1121063
ABSTRACT OF THE DISCLOSURE A microprogrammable control unit of a data processing unit includes first and second control stores. The first con- trol store is addressed initially by the operation code of a program instruction for read out o an address field, a con- trol sequence field and a register control field. The second control store is arranged to store a plurality of microin- struction sequences for executing program instructions. The control sequence field conditions hardware sequence control circuits to execute operations during instruction and cache cycles of program instruction processing. The address field is used for accessing a microinstruction sequence during the execution cycles of program instruction processing for com- pletion of the operation specified by a program instruction. The register control field is used to condition register cir- cuits, register busy circuits or increment circuits for select- ing various program visible registers, for controlling the updating of registers or for specifying an increment value to be added to the program instruction counter respectively dur- ing the processing of program instructions in the hardware sequence circuits and microinstruction sequences stored in the second control store. -1-
315895
Honeywell Information Systems Inc.
Smart & Biggar
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