Difference between revisions of "PM Opc AND"
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== AND = Logical AND == | == AND = Logical AND == | ||
− | {| border="1" style="text-align:left" | + | {| border="1" style="text-align:left" class="sortable" |
!Hex | !Hex | ||
!Mnemonic | !Mnemonic | ||
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"8-Bits Destination" Logic AND with "8-Bits Source". | "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 === | === Conditions === | ||
Line 124: | Line 136: | ||
Zero: Set when result is 0 | Zero: Set when result is 0 | ||
− | Sign: Set when | + | Sign: Set when bit 7 of the result is 1 |
+ | |||
+ | Carry and Overflow remain unchanged | ||
=== Examples === | === Examples === | ||
; A = 0x85 | ; A = 0x85 | ||
− | AND A, $80 | + | '''AND A, $80''' |
; A = 0x80 | ; A = 0x80 | ||
; F = (Zero=0):(Sign=1) | ; F = (Zero=0):(Sign=1) | ||
; B = 0xF0 | ; B = 0xF0 | ||
− | AND B, $04 | + | '''AND B, $04''' |
; B = 0x00 | ; B = 0x00 | ||
; F = (Zero=1):(Sign=0) | ; F = (Zero=1):(Sign=0) | ||
; A = 0xF0 | ; A = 0xF0 | ||
− | AND A, $55 | + | '''AND A, $55''' |
; A = 0x50 | ; A = 0x50 | ||
; F = (Zero=0):(Sign=0) | ; F = (Zero=0):(Sign=0) | ||
[[PM_InstructionList|'''« Back to Instruction set''']] | [[PM_InstructionList|'''« Back to Instruction set''']] |
Latest revision as of 00:26, 21 April 2009
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)