Difference between revisions of "Z80 Instruction Set"
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| − | ''' | + | == Data Movement == |
| + | '''EX''' | ||
| + | Three possible arguments: | ||
| − | '' | + | ''EX DE, HL'' |
| + | Swaps H with D and L with E | ||
| − | ''' | + | ''EX AF, AF''' |
| + | Swaps AF with its shadow | ||
| − | '' | + | ''EX (SP), HL'' |
| + | Swaps (SP) with L and (SP+1) with H. Index registers are also valid | ||
| − | |||
| − | ''' | + | '''EXX''' |
| + | Swap BC, DE and HL with their shadows | ||
| − | ''' | + | |
| + | '''LD''' | ||
| + | Four main arguments: | ||
| + | |||
| + | ''LD reg, #'' | ||
| + | Sets the eight or 16 bit contents of reg to # | ||
| + | |||
| + | ''LD reg2, reg1'' | ||
| + | Copies the contents of 8 bit reg1 to reg2 | ||
| + | |||
| + | ''LD (imm16), reg'' | ||
| + | Copies the value of 8 or 16 bit reg to 16 bit memory address imm16. Programmers should remember that 16 bit values are stored little-endian. | ||
| + | |||
| + | ''LD reg, (imm16)'' | ||
| + | Does the opposite of ''LD (imm16), reg'' | ||
Revision as of 17:42, 21 February 2006
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Data Movement
EX Three possible arguments:
EX DE, HL Swaps H with D and L with E
EX AF, AF' Swaps AF with its shadow
EX (SP), HL Swaps (SP) with L and (SP+1) with H. Index registers are also valid
EXX
Swap BC, DE and HL with their shadows
LD
Four main arguments:
LD reg, # Sets the eight or 16 bit contents of reg to #
LD reg2, reg1 Copies the contents of 8 bit reg1 to reg2
LD (imm16), reg Copies the value of 8 or 16 bit reg to 16 bit memory address imm16. Programmers should remember that 16 bit values are stored little-endian.
LD reg, (imm16) Does the opposite of LD (imm16), reg
