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From: d89os@efd.lth.se ((Mr))
Newsgroups: comp.sys.ibm.pc.misc
Subject: Re: 8088 4.77MHz -> NEC V20 8MHz
Summary: Yes, it's ok.
Message-ID: <1990Jul18.124457.16177@lth.se>
Date: 18 Jul 90 12:44:57 GMT
References: <2330@kannel.lut.fi>
Sender: newsuser@lth.se (LTH network news server)
Reply-To: d89os@efd.lth.se ((Mr) Ola Sigurdson)
Distribution: comp
Organization: Lund Institute of Technology, Sweden
Lines: 17

In article <2330@kannel.lut.fi> riiali@kannel.lut.fi (Pekka Riiali) writes:
>I have a Tandon XT with 4.77 MHz 8088 processor. I'd like to know
>if it is possible to change the processor to 8 MHz NEC V20. Half of
>the memory chips are 64-15RS and the other half are 256-12. I guess
>that there will be some problems with the slow memory.
>Any kind of help is appreciated.

Yes, I believe it's ok to change the processor.
	However, the crystal for the clock generator is  o u t s i d e  the 
processor. This means that if you pull out the 8088 and put the V20 in
you will have a V20 running at 4.77 MHz. The V20 will still be faster than
the 8088 though. (Due to a number of boring technical details.) There will
be no problem with the memory.
	If you want to run the V20 at 8 MHz you'll have to change the
crystal also. In this case there might be a memory problem, but as
I haven't got any information about the chip access times I cannot answer
your question.