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From: suwalski@spock (Woody Suwalski)
Newsgroups: comp.os.msdos.programmer,comp.sys.ibm.pc.misc
Subject: Re: TASM bug? (no, not at all)
Message-ID: <4310@chengb>
Date: 6 Sep 90 17:46:59 GMT
References: <4691@bdt.UUCP> <38580@shemp.CS.UCLA.EDU> <2953@amc-gw.amc.com>
Reply-To: suwalski@chengb (Woody Suwalski)
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Organization: Mitel. Kanata (Ontario). Canada.
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In article <2953@amc-gw.amc.com> jwbirdsa@europa.amc.com (James Birdsall) writes:
>   There's also MOVZX, an obscure instruction that is available on all 80x86.
>It will extend a byte to a word, zeroing the high byte. I don't know how the
>execution time compares to an XOR/MOV pair, but I suspect it is faster.
>   Unfortunately, the complementary instruction (MOVSX, move with sign
>extend) is only available on the 386.
>

Sorry, my 8086 book never mentioned MOVZX....

It requires at least a 286 processor...

Woody