mitsubishi - Al Kossow's Bitsavers

MITSUBISHI MICROCOMPUTERSMS0740-XXXSPSINGLE.CHIP I·BIT CMOS MICROCOMPUTERAddressing modeSymbolFunctionDetailsIMPIMMA BIT.A ZP BIT.ZPJMPJSRLDA(Note 2)LDMIf addressing mode is ASSPCL-ADLPCH-ADHIf addressing mode is INDPCL - (ADH• ADL)PCH-(ADH• ADL+1)If addressing mode is ZP, INDPCL - (00. ADL)PCH- (00. ADL + 1)M(S)-PCHS-S-lM(S)-PCLS-S-lAfter executing the above,if addressing mode is ASS,PCL-ADLPCH-ADHIf addressing mode Is SP,PCL-ADLPCH-FFIf addressing mode Is ZP, IND.PCL - (00. ADL)PCH- (00. ADL + 1)When T=OA-MWhen T=lM(X)-MM-IMMJumps to new address.After storing contents of program counter Instack, and jumps to new address.Load accumulator with contents of memory.Load memory indicated by index register X withcontents of memory specified by addressingmode shown in right column.Load memory with Immediate value.OP n:1* OP nA9 2:1* OP n :1* OP n :1* OP n :1* OP n :1*2 A5 3 23C 4 3LDXX-MLoad index register X with contents of memory.A2 22 A6 3 2LDYY-MLoad index register Y with contents of memory.AO 22 A4 3 2LSR 7 0O-CJ-CShift the contents of accumulator or memory tothe right by one bit.Oth bit of accumulator or memory is stored incarry, 7th bit is cleared.4A 2 1 46 5 2NOPORA(Note 1)PC-PC+1When T=OA-AVMWhen T=lM (X) -M (X) VMNo operation. EA 2Produce the logical OR of the contents of memoryand accumulator. The result Is stored inaccumulator.produce the logical OR of contents of memoryindicated by index register X and contents ofmemory specified by addressing mode shownin right column. The result is stored in memoryof address specified by index register X.109 22 05 3 23-30• MITSUBISHI"ELECTRIC