Date: Thu, 4 May 1995 04:21:32 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: pete@pelican.com (Pete Carah) Cc: current@FreeBSD.org Subject: Re: VLB VGA query Message-ID: <199505041121.EAA06712@gndrsh.aac.dev.com> In-Reply-To: <m0s6wGp-000K0iC@pelican.com> from "Pete Carah" at May 4, 95 01:28:26 am
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> > In trying an install of the recent SNAP, I've run into a strange > problem. > > System is an OPTI-based P90 with 3 VLB slots, 2 plain ISA (16bit) > slots, and 4 PCI slots. I don't know the manufacturer. Has an award > bios. > > VLB IDE controller, Genoa (Cirrus accelerated) VLB VGA, 2 Conner 1280mb > IDE disks (which work fine and even configure and work in freebsd!!) > > The problem is that there is data/attribute confusion in the vga, but > not under DOS at all. only_ under freebsd (but I haven't tried Windoze...) > I could get through the install by knowing generally what was going on > and hitting ^L a lot during the fdisk/disklabel steps. I presume that > I need to fix some delay somewhere... Does anyone have a pointer to > what? > > I've tried all the reasonable combinations of vlb and isa bus speed and > wait state jumpers (this one isn't soft-config'd for these speeds) with > no difference at all. I've left it at 8.33 mhz isa and '<=33' vlb with > no vlb wait states (as the board came). > > We don't need the vlb performance (this will be a server anyhow and > not run the X server) so will be substituting a cheap plain ISA vga card > when we get it, just to save the vlb one for someone that needs it. I > assume this will help, but don't know. > > However, has anyone seen this or something like it? > Are there known limitations of this chip set? I could get chip numbers > and date codes if needed... Well, try this, it fixed it for one setup I had here that had this problem in sys/i386/isa/syscons.c at about line 67 change: /* this may break on older VGA's but is usefull on real 32 bit systems */ #define bcopyw bcopy to #define bcopyw bcopyw Seems some VLB boards don't like you to use 32 bit memory references to the video memory :-(. Let me know if that fixes your problem. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Custom computers for FreeBSD
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