SBC A,r     Subtract with Carry     Rabbit 2000/3000/3000A Instruction

Opcode	Instruction	Clocks	Operation
----	SBC A,r	2	A = A - r - CF
9F	SBC A,A	2	A = A - A - CF
98	SBC A,B	2	A = A - B - CF
99	SBC A,C	2	A = A - C - CF
9A	SBC A,D	2	A = A - D - CF
9B	SBC A,E	2	A = A - E - CF
9C	SBC A,H	2	A = A - H - CF
9D	SBC A,L	2	A = A - L - CF

Flags				ALTD			IOI/IOE
S	Z	L/V	C	F	R	SP	S	D
·	·	V	·	·	·

Description

Subtracts the C flag and the data in r (any of the registers A, B, C, D, E, H, or L) 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 unchanged if A is equal to the data being subtracted from it.