8-Bit Arithmetic And Logical Group
__________________________________________________________________________________________________________________________
Mnemonic Symbolic Flags (bit 7-0) Instruction Number Number of Number of Comments
operation S Z . H . V N C opcode of bytes M cycles T states
__________________________________________________________________________________________________________________________
ADD A,r A <- A+r ? ? X ? X V 0 ? 10 000 <r> 1 1 4 r:
ADD A,n A <- A+n ? ? X ? X V 0 ? 11 000 110 2 2 7 000 C
-- <n> --- 001 B
ADD A,(HL) A <- A+(HL) ? ? X ? X V 0 ? 10 000 110 1 2 7 010 E
011 D
ADD A,(IX+d) A <- A+(IX+d) ? ? X ? X V 0 ? 11 011 101 (DDh) 3 5 19 100 L
ADD A,(IY+d) A <- A+(IY+d) ? ? X ? X V 0 ? 11 111 101 (FDh) 3 5 19 101 H
10 000 110 111 A
-- <d> ---
ADC A,s A <- A+s+CY ? ? X ? X V 0 ? .. 001 ... Please refer to ADD template
SUB s A <- A-s ? ? X ? X V 1 ? .. 010 ... Please refer to ADD template
SBC A,s A <- A-s-CY ? ? X ? X V 1 ? .. 011 ... Please refer to ADD template
AND s A <- A AND s ? ? X 1 X P 0 0 .. 100 ... Please refer to ADD template
XOR s A <- A XOR s ? ? X 0 X P 0 0 .. 101 ... Please refer to ADD template
OR s A <- A OR s ? ? X 0 X P 0 0 .. 110 ... Please refer to ADD template
CP s A - s ? ? X ? X V 1 ? .. 111 ... Please refer to ADD template
INC r r <- r+1 ? ? X ? X V 0 * 00 <r> 100 1 1 4
INC (HL) (HL) <- (HL)+1 ? ? X ? X V 0 * 00 110 100 1 3 11
INC (IX+d) (IX+d) <- (IX+d)+1 ? ? X ? X V 0 * 11 011 101 (DDh) 3 6 23
INC (IY+d) (IY+d) <- (IY+d)+1 ? ? X ? X V 0 * 11 111 101 (FDh) 3 6 23
00 110 100
-- <d> ---
DEC m m <- m-1 ? ? X ? X V 1 * .. ... 101 Please refer to INC template
Please note:
The V symbol i the flags column for the P/V flag identifies whether an overflow occurred by the operation. The P symbol in the P/V flag identifies parity. V = 1 means overflow, V = 0 means no overflow. P = 1 means the parity of the result is even. P = 0 means that the parity of the result is odd.