System for storing restart address of microprogram, determining

Details System for storing restart address of microprogram, determining System for storing restart address of microprogram, determining

1991-03-25

1992-09-08

Lee, Thomas C.

Boots, shoes, and leggings

364DIG2, 364945, 3649457, 3642622, G06F 926

Patent

active

051465698

ABSTRACT:
Method and apparatus for instruction restart processing in a microprogram-controlled data processing apparatus, wherein, in restarting an instruction execution after instruction suspension, the internal information of the data processing apparatus at the time of instruction execution suspension is saved in a memory, and after a suspension cause removal process performed the saved internal information is recovered. A check point address associated with the address of a currently executing microprogram is stored in accordance with a designation by the microprogram. After a suspension causes removal process is performed, the execution of the instruction restarts using the check point address. If a check point address has not been stored after the suspension cause removal process is performed, the execution of the instruction restarts from a read operation of the suspended instruction from the main storage.

REFERENCES:
patent: 4161026 (1979-07-01), Wilhite
patent: 4524415 (1985-06-01), Mills, Jr. et al.

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