8085 Microprocessor Machine/Processor Control Instructions YASH PAL, March 18, 2026April 25, 2026 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 operationOperationNo operation is performedLength1 byteAddressing modeNoneFlagsFlags are not affectedHLTStop the executionOperationMake the processor in a wait state until any externally initiated signal is given.Length1 byteAddressing modeNoneFlagsFlags are not affectedSTCSet carry flagOperationCY ← 1Length1 byteAddressing modeImplicit addressing modeFlagsThe carry flag is set; all other flags are not affected.CMCComplement the carry flagOperationCY ← CYLength1 byteAddressing modeImplicit addressing modeFlagsThe carry flag is complemented; all other flags are not affected.Microprocessor Subject Tutorials & Notes | Beginners Guide engineering subjects Microprocessor microprocessor