back2root:ibm-pc-ms-dos:instr:bt

BT - (386+ only)

BT - Bit Test

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
reg16,immed8	-	-	3	3	4-8
mem16,immed8	-	-	6	6	4-8
reg16,reg16	-	-	3	3	3-7
mem16,reg16	-	-	12	12	3-7

see Instructions list, Instruction Timing, 8086 Architecture, CPU

2023/01/05 22:53 · frater

back2root/ibm-pc-ms-dos/instr/bt.txt · Dernière modification : 2023/03/03 23:53 de 127.0.0.1