On Wed, 2002-09-11 at 16:09, Peter Stuge wrote: > On Tue, Sep 10, 2002 at 11:22:58PM -0700, Steve M. Gehlbach wrote: > > > > Maybe someone knows if alphanumeric mode setup is via the standard VGA > > > > register set on most modern VGA cards. > > > > > > > > > > I am afraid your are wrong. For modern VGA cards, there is actually no > > > alphanumeric mode. These alphanumeric mode were simulated by BIOS or > > > drivers. The worst thing, if you have no documents about these extended > > > registers, you have no way to drive the clock gen for Dot clock, Hsync, > > > Vsync. > > > > Are you saying that it is not possible to use a text console with Linux > > (vgacon.c) with modern VGA cards (BIOS mode 3)? Only framebuffer? Or are you > > saying that without extra information (ie, the BIOS or the manuals) you > > can't init it into mode 3? I don't understand your answer. > > > > I thought most vga cards were register compatible with the legacy VGA > > register set, only that there were a lot of other (sometimes secret) things > > to setup. Is this wrong? > > That's Ollie's point AFAICS. >
What is AFAICS ?? > > > Fortunately regular vga cards are not very important to me, actually, I am > > really most interested in integrated chipsets, such as the stpc and the via > > apollo ple133 northbridge, both of which are legacy VGA register > > compatible. > > In this case, when the chips really ARE VGA compatible, of course you can > program the neccessary registers with appropriate values and get the > expected results. You could try this for all graphics chips, just for fun. > With a little luck it will work better than we expect. > > You will want to dump the VGA registers on a running system, and of course > you're interested in 0x3c0, 0-0x14@0x3c0:0x3c0, 0x3c3, 0-4@0x3c4:0x3c5, > 0x3c6-0x3c9, 0-8@0x3ce:0x3cf and 0-0x14@0x3d4:0x3d5. > The catch is, for most cases, you have to program those "non-standard" undocumented extended register first then these Standard VGA registers become "Standard". You can try it anyway. Ollie _______________________________________________ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
