From owner-freebsd-questions Thu Dec 14 22:02:58 1995 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id WAA26756 for questions-outgoing; Thu, 14 Dec 1995 22:02:58 -0800 (PST) Received: from nike.efn.org (garcia.efn.org [198.68.17.5]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id WAA26751 for ; Thu, 14 Dec 1995 22:02:53 -0800 (PST) Received: (from gurney_j@localhost) by nike.efn.org (8.6.11/8.6.9) id WAA09197; Thu, 14 Dec 1995 22:03:56 -0800 Date: Thu, 14 Dec 1995 22:03:54 -0800 (PST) From: John-Mark Gurney Reply-To: John-Mark Gurney To: Michael Smith cc: d_burr@ix.netcom.com, alan@trickler.uu.silcom.com, questions@freebsd.org Subject: Re: Upgrade - CPU, clock? In-Reply-To: <199512160537.QAA29822@genesis.atrad.adelaide.edu.au> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-questions@freebsd.org Precedence: bulk On Sat, 16 Dec 1995, Michael Smith wrote: > John-Mark Gurney stands accused of saying: > > right now I'm running a i486dx33 at 40mhz... and running 70ns ram at 0w/s > > if I remeber right... I believe I had to turn of FAST page mode dram > > though... but I do have a question... I can get a Cyrix (yes I know.. > > they suck) 80dx2... could I run the chip at 80mhz (my motherboard > > supports it) but not double it? would there be problems with my IDE > > You don't understand. You run a DX2/80 at 40MHz, and it doubles internally. This is what I thought... but then why do you have to set some motherboard, or I should say some motherboard have, jumpers for when you run dx2 or dx4 proccessors... or is that just for bios recognition?? > > vlbus controller? would my isa bus break? from what I have heard about > > It would look like a DX/40 to your motherboard. You would most likely > have to set the >33MHz VLB jumper, which would then run your VLB at 20MHz. ahh... ok... this is wierd... I'm not sure I set my motherboard to the >33mhz but I just reciently moved a jumper on my vl ide card and decresed the hd delay... and preformance increased... (maybe just the delay decrease)... > > the motherboard doing to slow down of the chip on doubled and tripled > > chips that the cpu is actually rated at the fast mhz but I don't have the > > technical background to know... thanks for the help... > > This is garbled, but basically bogus. oh well... thanks for the info.. John-Mark gurney_j@efn.org Modem/FAX: (503) 683-6954 (FreeBSD Box) Live in Peace, destroy Micro$oft, support free software, run FreeBSD (unix) GCS/M/Sd#h+s+!gau-a--w++++vC+++++UF++++P---E---N++W---M--V--Y+t+5++G+b+D++ B----eu+h++!f++n---- CD5OUF++++.L-------2W.DM----N.9---NET2SP3s.2,4s.,4d.2,6---