Nintendo DMG-01 Manual - Page 83
SBC A,n
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Game BoyTM CPU Manual 3.3.3. 8-Bit ALU 4. SBC A,n Description: Subtract n + Carry flag from A. Use with: n = A,B,C,D,E,H,L,(HL),# Flags affected: Z - Set if result is zero. N - Set. H - Set if no borrow from bit 4. C - Set if no borrow. Opcodes: Instruction SBC SBC SBC SBC SBC SBC SBC SBC SBC Parameters A,A A,B A,C A,D A,E A,H A,L A,(HL) A,# Opcode 9F 98 99 9A 9B 9C 9D 9E ?? Cycles 4 4 4 4 4 4 4 8 ? by DP Page 83
Game Boy
TM
CPU Manual
3.3.3. 8-Bit ALU
4.
SBC A,n
Description:
Subtract n + Carry flag from A.
Use with:
n = A,B,C,D,E,H,L,(HL),#
Flags affected:
Z - Set if result is zero.
N - Set.
H - Set if no borrow from bit 4.
C - Set if no borrow.
Opcodes:
Instruction
Parameters
Opcode
Cycles
SBC
A,A
9F
4
SBC
A,B
98
4
SBC
A,C
99
4
SBC
A,D
9A
4
SBC
A,E
9B
4
SBC
A,H
9C
4
SBC
A,L
9D
4
SBC
A,(HL)
9E
8
SBC
A,#
??
?
by DP
Page 83