## AND = Logical AND

Hex | Mnemonic | Cycles
--- | --- | ---
20 | AND A, A | 8
21 | AND A, B | 8
22 nn | AND A, #nn | 8
23 | AND A, [HL] | 8
24 nn | AND A, [N+#nn] | 12
25 nn nn | AND A, [#nnnn] | 16
26 | AND A, [X] | 8
27 | AND A, [Y] | 8
9C nn | AND F, #nn | 12
CE B0 nn | AND B, #nn | 12
CE B1 nn | AND L, #nn | 12
CE B2 nn | AND H, #nn | 12
D8 nn nn | AND [N+#nn], #nn | 20
CE 20 ss | AND A, [X+#ss] | 16
CE 21 ss | AND A, [Y+#ss] | 16
CE 22 | AND A, [X+L] | 16
CE 23 | AND A, [Y+L] | 16
CE 24 | AND [HL], A | 16
CE 25 nn | AND [HL], #nn | 20
CE 26 | AND [HL], [X] | 20
CE 27 | AND [HL], [Y] | 20

### Execute

    #nn     = Immediate unsigned 8-Bits
    A       = Register A
    B       = Register B
    L       = Register L
    H       = Register H
    F       = Register F
    [N+#nn] = Memory: (I shl 16) or (N shl 8) or #nn
    [HL]    = Memory: (I shl 16) or HL
    [X]     = Memory: (XI shl 16) or X
    [Y]     = Memory: (YI shl 16) or Y
    [#nnnn] = Memory: #nnnn
    [X+#ss] = Memory: (XI shl 16) or (X + #ss)
    [Y+#ss] = Memory: (YI shl 16) or (Y + #ss)
    [X+L]   = Memory: (XI shl 16) or (X + signed(L))
    [Y+L]   = Memory: (YI shl 16) or (Y + signed(L))

    ; AND Ds, Sc
    ;
    ; Ds = Destination
    ; Sc = Source

    Ds = Ds AND Sc

### Description

"8-Bits Destination" Logic AND with "8-Bits Source".

    Can be used to reset (clear) one or multiple bits.

    Bit 0 - Mask $FE
    Bit 1 - Mask $FD
    Bit 2 - Mask $FB
    Bit 3 - Mask $F7
    Bit 4 - Mask $EF
    Bit 5 - Mask $DF
    Bit 6 - Mask $BF
    Bit 7 - Mask $7F
    All   - Mask $00

### Conditions

Zero: Set when result is 0

Sign: Set when bit 7 of the result is 1

Carry and Overflow remain unchanged

### Examples

    ; A = 0x85
    AND A, $80
    ; A = 0x80
    ; F = (Zero=0):(Sign=1)

    ; B = 0xF0
    AND B, $04
    ; B = 0x00
    ; F = (Zero=1):(Sign=0)

    ; A = 0xF0
    AND A, $55
    ; A = 0x50
    ; F = (Zero=0):(Sign=0)

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