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> SBC A,n Subtract with Carry Rabbit 2000/3000/4000 Instruction

> Opcode | Instruction | Clocks | Operation
> DE n | SBC A,n | 4 (2,2) | A = A - n - CF

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

> #### Description

> Subtracts the C flag and the 8-bit constant n from A.The difference 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.

> The Rabbit 4000 assembler views "SBC A,n" and "SBC n" as equivalent instructions. In the latter case, A is used even though it is not explicitly stated.

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