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From: Julian Elischer <julian@ref.tfs.com>
Message-Id: <199509060429.VAA02885@ref.tfs.com>
Subject: Re: Video Board, Cirrus Logic 5434 on PCI
To: jbrann@panix.com (John Brann)
Date: Tue, 5 Sep 1995 21:29:21 -0700 (PDT)
Cc: hardware@freebsd.org
In-Reply-To: <199509060252.WAA11828@panix2.panix.com> from "John Brann" at Sep 5, 95 10:52:13 pm
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you really should send these questions to the Xfree86  groups..
the freebsd group don't know the internals of their stuff.. we just import it..


> 
> > 
> > 
> > Is it possible to use a Cirrus (GD5434) Board with FreeBSD-2.05 and 
> > XFree86 ?
> > 
> > 
> Yes, definitely.  I have a PCI card with 2Mb memory which works just fine at 
> 8bpp.  It also worked with 1Mb - which brings me to another question...
> 
> I added the extra Meg of memory to move up to 64K colours.  In order to drive 
> my GD5434 up to 16bpp, I must specify a 'Membase' option for the framebuffer 
> base address.  To quote the 'Readme'...
> 
>   With a card on the PCI bus, there is a PCI configuration register that
>   holds the framebuffer base address. However, the driver currently does
>   not read it out yet, so you'll have to specify the address with
>   MemBase. On one system tested, it mapped at 0xa0000000, and it
>   appeared addresses where assigned in 0x08000000 increments over the
>   PCI devices. A program is most likely available to read out the PCI
>   configuration.
> 
> 
> So, does this program exist?  Alternatively, can I work out the info. I need
> from the boot messages?  I see that... 
> 
>    vga0 <VGA-compatible display device> rev 142 int a irq ?? on pci0:18
>    pci0: uses 16781312 bytes of memory from f800000 0 upto f8ffffff.
> 
> Any help is appreciated...
> 
> I'm running 2.0.5-950622-SNAP on a Pentium 60 with 32Mb of RAM
> 
> John
> 
> -- 
>   "That was inedible muck, and there wasn't enough of it."
>                                           Sir Henry Rawlinson.
> John Brann  --  jbrann@panix.com  jbrann@newparadigm.com
>