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back2root:ibm-pc-ms-dos:instr:infos:logical-opperators
Table des matières
Logical Opperators
AND
AND - Logical And
Performs a logical AND of the two operands replacing the destination with the result.
Usage:
AND dest,src
Modifies flags:
CF PF AF ZF SF OF
AF undefined
| Clocks | Size | |||||
|---|---|---|---|---|---|---|
| Operands | 808x | 286 | 386 | 486 | Bytes | |
| reg,reg | 3 | 2 | 2 | 1 | 2 | |
| mem,reg | 16+EA | 7 | 7 | 3 | 2-4 | (W88=24+EA) |
| reg,mem | 9+EA | 7 | 6 | 1 | 2-4 | (W88=13+EA) |
| reg,immed | 4 | 3 | 2 | 1 | 3-4 | |
| mem,immed | 17+EA | 7 | 7 | 3 | 3-6 | (W88=23+EA) |
| accum,immed | 4 | 3 | 2 | 1 | 2-3 | |
OR
OR - Logical Or
Logical inclusive OR of the two operands returning the result in the destination. Any bit set in either operand will be set in the destination.
Usage:
OR dest,src
Modifies flags:
CF PF AF ZF SF OF
AF undefined
| Clocks | Size | |||||
|---|---|---|---|---|---|---|
| Operands | 808x | 286 | 386 | 486 | Bytes | |
| reg,reg | 3 | 2 | 2 | 1 | 2 | |
| mem,reg | 16+EA | 7 | 7 | 3 | 2-4 | (W88=24+EA) |
| reg,mem | 9+EA | 7 | 6 | 1 | 2-4 | (W88=13+EA) |
| reg,immed | 4 | 3 | 2 | 1 | 3-4 | |
| mem8,immed8 | 17+EA | 7 | 7 | 3 | 3-6 | |
| mem16,imed16 | 25+EA | 7 | 7 | 3 | 3-6 | |
| accum,immed | 4 | 3 | 2 | 1 | 2-3 | |
NOT
NOT - Logical Not
Inverts the bits of the “dest” operand forming the 1s complement, also called “ One's Compliment Negation”.
Usage:
NOT dest
Modifies flags:
none
| Clocks | Size | |||||
|---|---|---|---|---|---|---|
| Operands | 808x | 286 | 386 | 486 | Bytes | |
| reg | 3 | 2 | 2 | 1 | 2 | |
| mem | 16+EA | 7 | 6 | 3 | 2-4 | (W88=24+EA) |
XOR
XOR- Exclusive Or
Performs a bitwise exclusive OR of the operands and returns the result in the destination.
Usage:
XOR dest,src
Modifies flags:
CF PF AF ZF SF OF
AF undefined
| Clocks | Size | |||||
|---|---|---|---|---|---|---|
| Operands | 808x | 286 | 386 | 486 | Bytes | |
| reg,reg | 3 | 2 | 2 | 1 | 2 | |
| mem,reg | 16+EA | 7 | 6 | 3 | 2-4 | (W88=24+EA) |
| reg,mem | 9+EA | 7 | 7 | 2 | 2-4 | (W88=13+EA) |
| reg,immed | 4 | 3 | 2 | 1 | 3-4 | |
| mem,immed | 17+EA | 7 | 7 | 3 | 3-6 | (W88=25+EA) |
| accum,immed | 4 | 3 | 2 | 1 | 2-3 | |
back2root/ibm-pc-ms-dos/instr/infos/logical-opperators.txt · Dernière modification : 2023/02/25 20:55 de frater
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