Date: Wed, 15 Nov 1995 23:14:04 +0100 (MET) From: Soren Schmidt <sos@FreeBSD.org> To: bde@zeta.org.au (Bruce Evans) Cc: darrylo@hpnmhjw.sr.hp.com, freebsd-bugs@FreeBSD.org, freebsd-questions@FreeBSD.org Subject: Re: "Bug" in syscons? Message-ID: <199511152214.XAA00502@SandBox> In-Reply-To: <199511151306.AAA04591@godzilla.zeta.org.au> from "Bruce Evans" at Nov 16, 95 00:06:23 am
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In reply to Bruce Evans who wrote:
>
> >which solves my corrupt font problems with syscons. Can anyone tell me
> >what the old 2.0.5 syscons is trying to do with the "weird" VGA register
> >values? I know what my "fixed" values are doing, but what are the old
> >values trying to do? (I just ordered a copy of Richard Wilton's
> >"Programmer's Guide to PC Video Systems", but it hasn't arrived yet.)
>
> In set_font_mode():
> old:
> > outb(TSIDX, 0x02); outb(TSREG, 0x04);
> >! outb(TSIDX, 0x04); outb(TSREG, 0x06);
> > outb(GDCIDX, 0x04); outb(GDCREG, 0x02);
> > outb(GDCIDX, 0x05); outb(GDCREG, 0x00);
> >! outb(GDCIDX, 0x06); outb(GDCREG, 0x05);
> new:
> > outb(TSIDX, 0x02); outb(TSREG, 0x04);
> >! outb(TSIDX, 0x04); outb(TSREG, 0x07);
> > outb(GDCIDX, 0x04); outb(GDCREG, 0x02);
> > outb(GDCIDX, 0x05); outb(GDCREG, 0x00);
> >! outb(GDCIDX, 0x06); outb(GDCREG, 0x00);
>
> TS reg 4 bit 0x01 is "Reserved" for the ET4000. Better not use it.
> GDC reg 6 bit 0x01 is "Graphics mode enable"; bits 0x04 and 0x08
> select the memory map:
> 0x00: 128K at 0xA0000
> 0x04: 64K at 0xA0000
> 0x08: 32K at 0xB0000
> 0x0C: 32K at 0xB8000
>
> Bruce
Excatly, I've allready sent mail directly, this patch blows up on
all my machines, I'll investigate further though...
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Soren Schmidt (sos@FreeBSD.org) FreeBSD Core Team
So much code to hack -- so little time
..
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