Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83; site intelca.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxj!ihnp4!zehntel!dual!amd!intelca!wizard From: wizard@intelca.UUCP (Kevin Supinger) Newsgroups: net.micro.pc Subject: Re: Speeding up the AT and PC 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