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The destination bit indexed by the source value is copied into the Carry Flag.
Usage:
BT dest,src ;
Modifies flags:
CF
Clocks | Size | |||||
---|---|---|---|---|---|---|
Operands | 808x | 286 | 386 | 486 | Bytes | |
none (PM) | - | - | 4 | 3 | 1 | |
reg16,immed8 | 4 | 3 | 2 | 1 | 3-4 | |
mem16,immed8 | 17+EA | 7 | 7 | 3 | 3-6 | (W88=23+EA) |
reg16,reg16 | 3 | 2 | 2 | 1 | 2 | |
mem16,reg16 | 16+EA | 7 | 7 | 3 | 2-4 | (W88=24+EA) |