Nintendo DMG-01 - Game Boy Console Manual page 7

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Game Boy CPU Manual
have been added and some have been taken away.
The following are added instructions:
ADD SP,nn
LDI (HL),A
LDD (HL),A
LDI A,(HL)
LDD A,(HL)
LD A,($FF00+nn)
LD A,($FF00+C)
LD ($FF00+nn),A
LD ($FF00+C),A
LD (nnnn),SP
LD HL,SP+nn
STOP
SWAP r
The following instructions have been removed:
Any command that uses the IX or IY registers.
All IN/OUT instructions.
All exchange instructions.
All commands prefixed by ED (except remapped RETI).
All conditional jumps/calls/rets on parity/overflow
and sign flag.
The following instructions have different opcodes:
LD A,[nnnn]
LD [nnnn],A
RETI
by DP
;nn = signed byte
;Write A to (HL) and increment HL
;Write A to (HL) and decrement HL
;Write (HL) to A and increment HL
;Write (HL) to A and decrement HL
;nn = signed byte
;Stop processor & screen until
button press
;Swap high & low nibbles of r
2.4. Processor
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