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From: dbraun@cadev5.intel.com (Doug Braun ~)
Newsgroups: comp.os.cpm
Subject: Re: Z80 Algorithms
Message-ID: <1111@mipos3.intel.com>
Date: 16 Oct 89 16:59:45 GMT
References: <8910132000.AA03993@rom.ecse.rpi.edu>
Sender: news@mipos3.intel.com
Reply-To: dbraun@cadev5.UUCP (Doug Braun ~)
Organization: Corporate CAD, INTeL Corporation, Santa Clara, CA
Lines: 30

In article <8910132000.AA03993@rom.ecse.rpi.edu> black@ROM.ECSE.RPI.EDU (Jerry Glomph Black) writes:

>  (Jurjen N.E. Bos) writes:
>>Maybe somebody is interested in this: I can multiply to unsigned 8-bit numbers
>>in 158 clockcycles.  . . .
>
>Big deal! Use a 64180 (aka Z180) chip, has the MLT instruction, takes 17
>clock cycles, or 1.85 micro seconds.  (By the way: it's a 2-byte instruction)
>
>Jerry Glomph Black, 8-bit terrorist


Bigger deal!! Use a Z280 and do *16* bit multiplies (signed AND unsigned)
in 25 or so clcok cycles.  Also divide! (32 bits / 16 bits).
Also 2-byte instructions.  Unless you want to do something like:
	HL := DEHL DIV (IX+2345H)


Doug Braun				Intel Corp CAD
					408 765-4279

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