ARiA和Ri间址单元中的数互换2半字节交换指令XCHDARiA的低4位Ri间接单元的低4位互换高4位不动3累加器高低半字节交换指令SWAPAA的高4位D7D4和低4位D3D0互换七加法指令1不带Cy加法指令ADDAR
A←AR
ADDAdirectA←AdirectADDARiA←ARiADDAdataA←Adata2带进位加法指令ADDCAR
A←ACyR
ADDCAdirectA←ACydirectADDCARiA←ACyRiADDCAdataA←ACydata3加1指令INCAA←A1INCR
R
←R
1INCRiRi←Ri1INCdirectdirect←direct1
fINCDPTRFPTR←DPTR1八减法指令1带进位减法指令SUBBAR
A←ACyR
SUBBAdirectA←ACydirectSUBBARiA←ACyRiSUBBAdataA←ACydata2减1指令DECAA←A1DECdirectdirect←durect1DECR
R
←R
1DECRiRi←Ri1九乘除指令1乘法指令MULABBA←AB指令功能是把累加器A和特殊功能寄存器B中两个8位无符号整数相乘并把积的高8位字节存入B寄存器低8位字节存入累加器A2除法指令DIVABAB商存入A余数存入B指令的功能是把累加器A中的8位无符号整数除以寄存器B中的8位无符号整数商的整数部分存入累加器A中余数保留在B中十十进制调整指令DAA十一逻辑运算指令1逻辑与运算指令ANLAR
A←A∧R
ANLAdirectA←A∧directANLARiA←A∧RiANLAdataA←A∧dataANLdirectAdirect←A∧directANLdirectdatadirect←direct∧data2逻辑或运算指令ORLAR
A←A∨R
ORLAdirectA←A∨directORLARiA←A∨RiORLAdataA←A∨dataORLdirectAdirect←A∨directORLdirectdatadirect←direct∨data3逻辑异或运算指令XRLAR
A←A⊙R
XRLAdirectA←A⊙directXRLARiA←A⊙RiXRLAdataA←A⊙dataXRLdirectAdirect←A⊙direct
fXRLdirectdatadirect←direct⊙data4累加器清0和去反指令CLRAA←0累加器清0指令CLRAA←A累加器取反指令5累加器移位指令不带进位Cy循环左移RLAD
1←D
D0←D7D7←D6←D5←D4←D3←D2←D1←D0←D7……不带进位Cy循环右移RRAD
1→D
D0→D7D7→D6→D5→D4→D3→D2→D1→D0→D7……带进位Cy循环左移RLCACy←D7D
1←D
D0←CyD7←D6←D5←D4←D3←D2←D1←D0←Cy←D7……带进位Cy循环右移RRCACy→D7D
1→D
D0→CyCy→D7→D6→D5→D4→D3→D2→D1→D0→Cy……十二控制转移指令1无条件转移指令1长转移指令LJMPaddr16PC←addr162绝对转移指令AJMr