Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!hp-pcd!hpsgwp!plim From: plim@hpsgwp.sgp.hp.com (Peter Lim) Newsgroups: comp.sys.ibm.pc.hardware Subject: Re: 287 in a 386-33 system? Message-ID: <3370012@hpsgwp.sgp.hp.com> Date: 21 Feb 91 07:45:07 GMT References: <1991Feb19.080902.21887@amd.com> Organization: HP Singapore IC Design Ctr Lines: 30 / james@bigtex.cactus.org (James Van Artsdalen) / 2:46 am Feb 20, 1991 / writes: $ Won't work. Intel dropped the 287 support from the 386 back with the $ D step I believe. All 33MHz parts are D0 steppings or later, so $ there's no way to get a 287 to work. Besides, a 287 never really $ worked right with a 386 anyway. $ I am not too sure about this. My 386 is a 25 MHz model (non-cache). It has a 287 socket as well as 387 / Weitek socket. According to the manual, the 287 should run at its own pace at 8 MHz whereas the 386 and 387 runs at 25 MHz. I have never used the 287 socket, but a friend of mine, who has an identical board uses a 287 and he says it works. My board is more than one year old though. And since then, I have not seen a 386 board which accept both 287 and 387 --- may be 387 has become cheap enough for 287 to be ignored (no ??). ps: If I remember correctly, my 386 chip is D0 stepping. But I have not look at it for a long time, so I could be using an older chip. Regards, . .. ... .- -> -->## Life is fast enough as it is ........ Peter Lim. ## .... DON'T PUSH IT !! >>>-------, ########################################### : E-mail: plim@hpsgwg.HP.COM Snail-mail: Hewlett Packard Singapore, : Tel: (065)-279-2289 (ICDS, ICS) | Telnet: 520-2289 1150 Depot Road, __\@/__ Singapore 0410. SPLAT ! #include