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

BTR - (386+ only)

BTR - Bit Test with Reset

The destination bit indexed by the source value is copied into the Carry Flag and then cleared in the destination.

Usage:

	BTR	dest,src	;

Modifies flags:

CF

	Clocks				Size
Operands	808x	286	386	486	Bytes
reg16,immed8	-	-	6	6	4-8
mem16,immed8	-	-	8	8	4-8
reg16,reg16	-	-	6	6	3-7
mem16,reg16	-	-	13	13	3-7

see Instructions list, Instruction Timing, 8086 Architecture, CPU

2023/01/05 22:53 · frater

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