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

DEC

DEC - Decrement

Unsigned binary subtraction of one from the destination.

Usage:

	DEC	dest	;

Modifies flags:

AF OF PF SF ZF

	Clocks				Size
Operands	808x	286	386	486	Bytes
reg8	3	2	2	1	2
mem	15+EA	7	6	3	2-4
reg16/32	3	2	2	1	1

see Instructions list, Instruction Timing, 8086 Architecture, CPU

2023/01/05 22:53 · frater

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