Nintendo DMG-01 Manual - Page 93
Description, Decrement register nn., Use with, nn = BC,DE,HL,SP, Flags affected, None., Opcodes,
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Game BoyTM CPU Manual 4. DEC nn Description: Decrement register nn. Use with: nn = BC,DE,HL,SP Flags affected: None. Opcodes: Instruction DEC DEC DEC DEC Parameters BC DE HL SP 3.3.4. 16-Bit Arithmetic Opcode 0B 1B 2B 3B Cycles 8 8 8 8 by DP Page 93
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Game Boy
TM
CPU Manual
3.3.4. 16-Bit Arithmetic
4.
DEC nn
Description:
Decrement register nn.
Use with:
nn = BC,DE,HL,SP
Flags affected:
None.
Opcodes:
Instruction
Parameters
Opcode
Cycles
DEC
BC
0B
8
DEC
DE
1B
8
DEC
HL
2B
8
DEC
SP
3B
8
by DP
Page 93