Instruction Reference Manual 131
Description
Subtracts the C flag and the data whose address is:
• the data in HL, or
• the sum of the data in IX and a displacement d,or
• the sum of the data in IY and a displacement d
from the data in A. The result is stored in A.
These operations output an inverted carry:
• The C flag is set if A is less than the data being subtracted from it.
• The C flag is cleared if A is greater than the data being subtracted from it.
• The C flag is unchaged if A is equal to the data being subracted from it.
SBC A,(HL)
SBC (IX+d)
SBC (IY+d)
Opcode Instruction Clocks Operation
9E SBC A,(HL) 5 (2,1,2) A = A - (HL) - CF
DD 9E d SBC (IX+d) 9 (2,2,2,1,2) A=A-(IX+d)-CF
FD 9E d SBC (IY+d) 9 (2,2,2,1,2) A=A-(IY+d)-CF
Flags ALTD I/O
S Z L/V C F R SP S D
• • V • • • •
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