Date: Wed, 24 Apr 1996 09:30:12 +0200 (MET DST) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-current@FreeBSD.org (FreeBSD-current users) Cc: cat@ki.net, geoff@ki.net, scrappy@ki.net (Marc G. Fournier) Subject: Re: MotherBoard Jumper Settings... Message-ID: <199604240730.JAA26732@uriah.heep.sax.de> In-Reply-To: <Pine.NEB.3.93.960423231641.5120A-100000@freebsd.ki.net> from "Marc G. Fournier" at Apr 23, 96 11:30:11 pm
next in thread | previous in thread | raw e-mail | index | archive | help
As Marc G. Fournier wrote: > Third, the Oscillator Frequency was set for 33Mhz instead > of 25Mhz...have fixed it... (Others told you that a DX4 is 3x, so the 33 MHz was right.) > As far as the cache is concerned, I have: > > 4x UM61512AK-15/95282/N52049's > 1x W24129AK-15/95200 (Tag SRAM) > > Am I correct in assuming that the -15 is the speed of the cache? > If so, and I haven't changed that one yet, my CMOS is set for 20ns... > would that produce any of the bugs I've been reporting? I don't think so. The tag RAM is IMHO normally faster than the cache, perhaps that's why they kept the cache timing slower than necessary in the setup. > The jumpers for the cache are set for 256KB/64kbx4...how do I > determine the size of each of the cache chips to determine if *this* is > right? The 61512 suggests a 512 Kbit cache. Seems you are using only half of it with your jumper setting. > What is "the ECP DMA Channel"? Its currently set for DMA 3... > is that correct? This hypermodern parallel channel. We don't use it, and most likely, you don't even have it enabled, but are using it in dumb Centronics compatibility mode. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199604240730.JAA26732>