MUL (SPC700): Difference between revisions

Revision as of 17:10, 23 July 2023


Basic Info
Addressing Mode	Opcode	Length	Speed
implied	CF	1 byte	9 cycles


Flags Affected
N	V	P	B	H	I	Z	C
	.	.	.	.	.		.

MUL is an SPC700 instruction that multiplies the value in the Y index register by the value in the accumulator and stores the product in YA. The high byte of the product is stored in Y and the low byte is stored in A.^[2]

External Links

Official Super Nintendo development manual on MUL: Appendix C-8 of Book I
https://forums.nesdev.org/viewtopic.php?p=141221#p141221

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-!colspan="8"|Flags Clobbered
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-'''MUL''' is an [[SPC700]] instruction that multiplies the value in the [[Y index register]] by the value in the [[accumulator]] and stores the product in [[YA]].
+'''MUL''' is an [[SPC700]] instruction that multiplies the value in the [[Y index register]] by the value in the [[accumulator]] and stores the product in [[YA]].  The high byte of the product is stored in Y and the low byte is stored in A.<sup>[2]</sup>
 === See Also ===
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 === External Links ===
-* Official Super Nintendo development manual on MUL: [https://archive.org/details/SNESDevManual/book1/page/n233 Appendix C-8 of Book I]
+# Official Super Nintendo development manual on MUL: [https://archive.org/details/SNESDevManual/book1/page/n233 Appendix C-8 of Book I]
+# https://forums.nesdev.org/viewtopic.php?p=141221#p141221
 [[Category:ASM]]
 [[Category:SPC700]]
 [[Category:Multiplication and Division Commands]]