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- Path: sparky!uunet!destroyer!gatech!pitt!cuphub.cup.edu!luf4695
- From: luf4695@cuphub.cup.edu
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: IBM XT processor upgrade
- Message-ID: <1992Nov9.194014.99@cuphub.cup.edu>
- Date: 10 Nov 92 00:40:14 GMT
- References: <BwEoFv.MH4@syd.dms.CSIRO.AU> <1992Oct29.201131.84@cuphub.cup.edu> <BwxBuL.Ay5@dei.unipd.it>
- Organization: California University of Pennsylvania, California, PA
- Lines: 40
-
- In article <BwxBuL.Ay5@dei.unipd.it>, davide@sabrina.dei.unipd.it (Davide 'aie' Melan) writes:
- > In article <1992Oct29.201131.84@cuphub.cup.edu> luf4695@cuphub.cup.edu writes:
- >>In article <BwEoFv.MH4@syd.dms.CSIRO.AU>, valaris@swifty.dap.CSIRO.AU (Andrew Valaris) writes:
- >>>
- >>> Is it possible just to replace only the 4.77 Mhz 8088 with a 8Mhz 8088 on
- >>> an XT without any problems, or am I missing something.
- >>>
- >>> If not, how can I speed up the clock rate without replacing the motherboard.
- >>
- >> I'm not an EE but I know the speed of a computer is not only based on
- >>the chip used. It is also based on a quartz crystal "clock" that sends out
- >>pulses at a specific rate(MHz). Replacing a 4.77 MHz 8088 with a 8 MHz will
- >>not work. The only way to get a faster machine is to upgrade the whole
- >>thing(motherboard). You could probably find a 8 MHz 8088 for alot less than
- >>$50.
- >
- > please, don't think i'm silly but I've replaced an old I-8088/4.77 with a
- > NEC V20 / 10MHz on a CBM PC 10 ][ and all works fine: i replaced only
- > the chip and performances gained a 10%.
- >
- > ============\
- > ==========\ \
- > | | |
- > | | | davide@sabrina.dei.unipd.it
- > | |\-----/| | (fax # ++39 424 72074)
- > =+|| | | |
- > ==+|| |/-----\| | UNIVERSITA` DI PADOVA - ITALY
- > | | | | D.E.I.
- > | | | Department of Electronics & Informatics
- > ====______+==+
- > =====______
-
- I'm pretty sure the 10% performance increase was due to the NEC V20 being
- faster than a 8088 and not the speed of the chip. I am almost positive that
- your 10MHz chip is running at 4.77MHz if you didn't also change the crystal
- on the motherboard. If anyone out there knows, please help. Thanks.
-
- Bryan Luff
- Cal. U. of PA
- Math & Com. Sci.
-