MPY - Revision history

TArntsen: multiply->multiplies

2010-05-31T13:12:24Z

multiply->multiplies

← Older revision		Revision as of 13:12, 31 May 2010
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	}}		}}

	'''MPY''' is an assembly instruction. It ~~multiply~~ the contents of the memory location pointed to by the [[effective address]] with the		'''MPY''' is an assembly instruction. It multiplies the contents of the memory location pointed to by the [[effective address]] with the
	contents of the [[A register]], leaving the result in the A register.		contents of the [[A register]], leaving the result in the A register.

Mike: fixing a typo

2009-08-09T17:23:37Z

fixing a typo

← Older revision		Revision as of 17:23, 9 August 2009
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	== Flags affected ==		== Flags affected ==
	If an overflow occurs, that is if the result has an absolute value greater than 32767<sub>10</sub>,		If an overflow occurs, that is if the result has an absolute value greater than 32767<sub>10</sub>,
	both the [[dynamic overflow indicator]] ('''O''') and the [[static overflow indicator]] ('''Q''') are set to one.		both the [[dynamic overflow indicator]] ('''Q''') and the [[static overflow indicator]] ('''O''') are set to one.

Mike: MPY instruction

2009-08-09T08:05:31Z

MPY instruction

New page

{{InstructionBox
|Mnemonic=MPY
|Description=Multipy integer
|Format=MPY ''<[[ND-100 addressing modes|addr. mode]]> <[[displacement|disp.]]>''
|Code=120 000
|Affected=A:=A*(ea), O, Q
|Architecture=[[ND-100]], [[ND-110 CPU|ND-110]]
}}

'''MPY''' is an assembly instruction. It multiply the contents of the memory location pointed to by the [[effective address]] with the
contents of the [[A register]], leaving the result in the A register.

== Flags affected ==
If an overflow occurs, that is if the result has an absolute value greater than 32767<sub>10</sub>,
both the [[dynamic overflow indicator]] ('''O''') and the [[static overflow indicator]] ('''Q''') are set to one.

== References ==
*{{ND-doc|06.014.02|Page 136}}
*{{ND-doc|06.029.01|Page 65}}

[[Category:ND-100 instructions]]