8085 Microprocessor Machine/Processor Control Instructions

YASH PAL,

8085 Microprocessor Machine/Processor Control Instructions – These instructions are used to set and reset some internal flags of the processor and to put the processor in Halt or No Operation states.

NOPNo operation
OperationNo operation is performed
Length1 byte
Addressing modeNone
FlagsFlags are not affected
HLTStop the execution
OperationMake the processor in a wait state until any externally initiated signal is given.
Length1 byte
Addressing modeNone
FlagsFlags are not affected
STCSet carry flag
OperationCY ← 1
Length1 byte
Addressing modeImplicit addressing mode
FlagsThe carry flag is set; all other flags are not affected.
CMCComplement the carry flag
OperationCY ← CY
Length1 byte
Addressing modeImplicit addressing mode
FlagsThe carry flag is complemented; all other flags are not affected.
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