From owner-freebsd-current Thu May 4 04:21:52 1995 Return-Path: current-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id EAA06776 for current-outgoing; Thu, 4 May 1995 04:21:52 -0700 Received: from gndrsh.aac.dev.com (gndrsh.aac.dev.com [198.145.92.241]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id EAA06766 for ; Thu, 4 May 1995 04:21:44 -0700 Received: (from rgrimes@localhost) by gndrsh.aac.dev.com (8.6.11/8.6.9) id EAA06712; Thu, 4 May 1995 04:21:33 -0700 From: "Rodney W. Grimes" Message-Id: <199505041121.EAA06712@gndrsh.aac.dev.com> Subject: Re: VLB VGA query To: pete@pelican.com (Pete Carah) Date: Thu, 4 May 1995 04:21:32 -0700 (PDT) Cc: current@FreeBSD.org In-Reply-To: from "Pete Carah" at May 4, 95 01:28:26 am X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 1988 Sender: current-owner@FreeBSD.org Precedence: bulk > > 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