Microprocessor implementing single-step or sequential microcode

Details Microprocessor implementing single-step or sequential microcode Microprocessor implementing single-step or sequential microcode

1993-09-28

1995-12-12

Geckil, Mehmet

Boots, shoes, and leggings

395800, 395375, 364DIG1, 364258, 3642627, 3642656, G06F 1100, G06F 926

Patent

active

054758521

ABSTRACT:
A microprocessor having a test mode wherein a test instruction including an instruction for executing the whole microprogram routine and a step-execution instruction for executing only one microinstruction of an arbitrary address in a micro ROM for easily diagnosing each internal function blocks by independently operating them, and a circuit for changing the content of sequence field of the microinstruction outputted to the microsequencer at executing the step-instruction. The circuit is used for executing the microprogram routine step by step with combining instructions which execute only one microinstruction, or a specified instruction between two continuous microinstructions of a microprogram routine, so that the cause of fault points in the microprocessor can be easily specified.

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