WDM: Difference between revisions

Revision as of 01:08, 1 May 2023

WDM (the initials of William David Mensch, the designer of the 65c816) is an instruction that reserves its signature byte for future expansion of the instruction set. None of these extra 256 opcodes were ever implemented, so WDM functions essentially as a two-byte NOP.


Basic Info
Addressing Mode	Opcode	Length	Speed
	42	2 byte	2 cycles


Flags Clobbered
N	V	M	X	D	I	Z	C
.	.	.	.	.	.	.	.

Revision as of 22:39, 30 April 2023 (view source) Xetheria (talk \| contribs) (added basic info) ← Older edit		Revision as of 01:08, 1 May 2023 (view source) Xetheria (talk \| contribs) (link to bio) Newer edit →
Line 1:		Line 1:
	'''WDM''' (the initials of William David Mensch, the designer of the [[65c816]]) is an instruction that reserves its signature byte for future expansion of the instruction set. None of these extra 256 opcodes were ever implemented, so WDM functions essentially as a two-byte [[NOP]].		'''WDM''' (the initials of [https://themenschfoundation.org/who-is-william-d-mensch-jr-aka-bill-mensch/ William David Mensch], the designer of the [[65c816]]) is an instruction that reserves its signature byte for future expansion of the instruction set. None of these extra 256 opcodes were ever implemented, so WDM functions essentially as a two-byte [[NOP]].

	{\| class="wikitable" style="float:right;clear:right;width:30%"		{\| class="wikitable" style="float:right;clear:right;width:30%"