Megalextoria
Retro computing and gaming, sci-fi books, tv and movies and other geeky stuff.

Home » Archive » net.micro.pc » Re: Speeding up the AT and PC
Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend 
Switch to threaded view of this topic Create a new topic Submit Reply
Re: Speeding up the AT and PC [message #86454] Tue, 18 June 2013 23:01
Anonymous
Karma:
Originally posted by: wizard@intelca.UUCP (Kevin Supinger)
Message-ID: <456@intelca.UUCP>
Date: Fri, 30-Nov-84 12:45:51 EST
Article-I.D.: intelca.456
Posted: Fri Nov 30 12:45:51 1984
Date-Received: Sun, 2-Dec-84 03:45:43 EST
References: <257@pertec.UUCP>
Organization: Intel, Santa Clara, Ca.
Lines: 23


	Sometimes I really wonder about the amount of 
misinformation that is propagated by this network. But as far
as speeding up the IBM AT I would like to set the record straight
As a point of reference I happen to own one of the "GEMs" and
have actually tried the speed up. It is very simple to do and
was performed the second day after recieving my AT. It has run
for over 3 months now without a glitch. You replace the socketed
crystal with a 16 MHZ crystal. Carefully pull the 80286 pin grid
array out of the socket. Replace it with an 8 MHZ 80826 . If an 
80287 is used in the system it must be the same speed or a 
special adapter card should be used with an 8284 clock generator
so that a lower clock speed for the 80287 is provided. You
might note that the 80287 was designed to be asyncronous with the
80286 clock. The observent student may also examine the AT tech
ref manual to note that the IBM AT was designed for 8 MHZ 80286
operation. This doesn't affect the disk controller or the memory
,which is the proper speed. Current programs execute at 25% of
the original XT speed. This really enhances the AT. It would
be very nice in the future if the net would look at INTEL as
the shining star it really is.

These views are my own and do not reflect on Intel
  Switch to threaded view of this topic Create a new topic Submit Reply
Previous Topic: Problem: PC Portable with hard disk
Next Topic: Re: 80286 microprocessor problems
Goto Forum:
  

-=] Back to Top [=-
[ Syndicate this forum (XML) ] [ RSS ] [ PDF ]

Current Time: Thu Mar 28 18:18:05 EDT 2024

Total time taken to generate the page: 0.17987 seconds