## SBC = Subtract with Carry (16-Bits)

Hex | Mnemonic | Cycles
--- | --- | ---
CF 0C | SBC BA, BA | 16
CF 0D | SBC BA, HL | 16
CF 0E | SBC BA, X | 16
CF 0F | SBC BA, Y | 16
CF 2C | SBC HL, BA | 16
CF 2D | SBC HL, HL | 16
CF 2E | SBC HL, X | 16
CF 2F | SBC HL, Y | 16
CF 62 nn nn | SBC BA, #nnnn | 16
CF 63 nn nn | SBC HL, #nnnn | 16

### Execute

    #nnnn    = Immediate unsigned 16-Bits
    BA       = Register BA: (B shl 8) or A
    HL       = Register HL: (H shl 8) or L
    X        = Register X
    Y        = Register Y

    ; SBC Ds, Sc
    ;
    ; Ds = Destination
    ; Sc = Source

    Ds = Ds - Sc - Carry

### Description

16-Bits Source and Carry subtracts to the 16-Bits Destination.

### Conditions

Zero: Set when result is 0

Carry: Set when result is < 0

Overflow: Set when result overflow 16-bits signed range (< -32768 OR > 32767)

Sign: Set when bit 15 of the result is 1

### Examples

    ; BA = 0x2EF0
    ; F = (Carry=1)
    SBC BA, $1337
    ; BA = 0x1BB8 (0x2EF0 - 0x1337 - 0x0001 = 0x(0)1BB8)
    ; F = (Zero=0):(Carry=0):(Overflow=0):(Sign=0)

    ; HL = 0xBB7E
    ; BA = 0xCF12
    ; F = (Carry=0)
    SBC BA, HL
    ; HL = 0xBB7E
    ; BA = 0xEC6C (0xCF12 - 0xBB7E - 0x0000 = 0x(1)EC6C)
    ; F = (Zero=0):(Carry=1):(Overflow=0):(Sign=1)

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