Chapter 12 List of Machine Language Instructions
List of Machine Language Instructions 231
12.3 List of Machine Language Instructions
Symbol Description
An, Am Address register (n, m=3 to 0)
Dn, Dm Data register (n, m = 3 to 0)
Di Index, a data register (i=0,1,2,3)
SP Stack pointer register
imm Immediate data
imm8 8-bit immediate data specified with an instruction
imm16 16-bit immediate data specified with an instruction
imm32 32-bit immediate data specified with an instruction
abs16 A 16-bit absolute address specified by the instruction
abs32 A 32-bit absolute address specified by the instruction
dDisplacement data
d8 8-bit offset data specified with an instruction
d16 16-bit offset data specified with an instruction
d32 32-bit offset data specified with an instruction
MDR Multiply/divide register
LIR Loop instruction register
LAW Instruction fetch address register
PSW Program status word
CF Carry flag
ZF Zero flag
NF Negative flag
VF Overflow flag
PC Program counter
regs Specification of multiple registers
( ) Indicates an indirect address