NOP 
none 

No operation. 
ENI 
none 
E 
Enable interrupts. 
DSI 
none 
E 
Disable interrupts. 
STC 
none 
C 
Set the carry flag to 1. 
CLC 
none 
C 
Set the carry flag to 0. 
CMC 
none 
C 
Invert the carry flag. 
RET 
none 

Return from a routine. 
RTI 
none 
EZCNO 
Return from an interrupt routine. 
INT 
c10 
EZCNO 
Trigger interrupt with interrupt vector c10, regardless of the E flag. 
RETN 
c10 

Return from a routine and free c10. positions from the stack. 
NEG 
op 
ZCNO 
Invert the sign of op. 
INC 
op 
ZCNO 
Increment op. 
DEC 
op 
ZCNO 
Decrement op. 
COM 
op 
ZN 
Bitwise NOT, complement (op = !op). 
PUSH 
op 

Push op to the top of the stack. 
POP 
op 

Pop the top of the stack to op. 
SHR 
op, c4 
ZCN 
Shift right op by c4 bits. 
SHL 
op, c4 
ZCN 
Shift left op by c4 bits. 
SHRA 
op, c4 
ZCNO 
Arithmetic shift right, same as SHR but sets the overflow flag. 
SHLA 
op, c4 
ZCNO 
Arithmetic shift left, same as SHL but sets the overflow flag. 
ROR 
op, c4 
ZCN 
Rotate right op by c4 bits. 
ROL 
op, c4 
ZCN 
Rotate left op by c4 bits. 
RORC 
op, c4 
ZCN 
Rotate right (with carry) op by c4 bits. 
ROLC 
op, c4 
ZCN 
Rotate left (with carry) op by c4 bits. 
CMP 
op0, op1 
ZCNO 
Compare op0 and op1 (same as SUB without changing any operands). 
ADD 
op0, op1 
ZCNO 
Add op0 and op1 (op0 = op0 + op1). 
ADDC 
op0, op1 
ZCNO 
Add op0, op1 and the carry flag (op0 = op0 + op1 + C). 
SUB 
op0, op1 
ZCNO 
Subtract op0 and op1 (op0 = op0  op1). 
SUBB 
op0, op1 
ZCNO 
Subtract op0, op1 and the carry flag (op0 = op0  op1  C). 
MUL 
op0, op1 
ZCNO 
Multiply (no sign) op0 by op1, both operands are used to store the result (op0  op1 = op0 * op1). 
DIV 
op0, op1 
ZCNO 
Divide (no sign) op0 by op1, both operands are used to store the result (op0 = result; op1 = remainder). 
TEST 
op0, op1 
ZN 
Test op0 and op1 (same as AND without changing any operands). 
AND 
op0, op1 
ZN 
Bitwise AND (op0 = op0 ∧ op1). 
OR 
op0, op1 
ZN 
Bitwise OR (op0 = op0 ∨ op1). 
XOR 
op0, op1 
ZN 
Bitwise XOR (op0 = op0 ⊕ op1). 
MOV 
op0, op1 

Copy op1 to op0 (op1 = op0). 
MVBH 
op0, op1 

Copy higher byte of op1 to the higher byte of op0 (op0 = (op0 and 0x00ff) or (op1 and 0x00ff)). 
MVBL 
op0, op1 

Copy lower byte of op1 to the lower byte of op0 (op0 = (op0 and 0xff00) or (op1 and 0xff00)). 
XCH 
op0, op1 

Exchange op0 and op1 (op0 = op1; op1 = op0) 
JMP 
op 

Unconditional jump to op. 
JMP.cond 
op 

Jump to op based on condition cond. 
CALL 
op 

Unconditional routine call to op. 
CALL.cond 
op 

Routine call to op based on condition cond. 
BR 
c6 

Unconditional branch jump to PC + c6. 
BR.cond 
c6 

Branch jump to PC + c6 based on condition cond. 