Difference between revisions of "PM Opc SBC16"
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(New page: == SBC = Subtract with Carry (16-Bits) == {| border="1" style="text-align:left" !Hex !Mnemonic !Cycles |- |CF 0C |SBC BA, BA |16 |- |CF 0D |SBC BA, HL |16 |- |CF 0E |SBC BA, X |16 |- |CF ...) |
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X = Register X | X = Register X | ||
Y = Register Y | Y = Register Y | ||
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; SBC Ds, Sc | ; SBC Ds, Sc |
Revision as of 03:30, 9 November 2008
Contents
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 15th bit 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)