From: kennu@mits.mdata.fi (Kenneth Falck) Subject: Re: How to switch back to VGA-text from SVGA-text mode??? Date: Fri, 26 Mar 1993 17:15:16 GMT
In article <1993Mar24.224133.12392@primerd.prime.com> cummings@hammer.prime.com (Kevin Cummings) writes:
>Since video hardware varies from machine to machine (and card to card)
>the only "portable" method of doing this is for the system to provide a
>common interface to the video hardware. This method is currently the INT 14
>code in your video BIOS. Sadly, OSes like LINUX do not use any of the BIOS
>code in your machine. Therefore, you need a program to do the work for you.
You know, this is something I've been wondering for some time now.
Why exactly is it that BIOS calls can't be made under Linux?
I think I recall someone describing the details many months ago,
but I didn't pay too much attention until I recently got an
ET4000 and wanted to switch between modes 132x44 and 80x50 without
rebooting all the time.
I suppose I should get a reference sheet or something and start
hacking... There's a doc in the vgalib distribution but it's very
terse. Furthermore I have no documentation of how to use ioperm()
and stuff like that. :-/
>--
>Kevin J. Cummings ComputerVision Services
>cummings@kjc386.framingham.ma.us cummings@primerd.Prime.COM
-- kennu@mits.mdata.fi Tired of DOS? Try Linux, a free UNIX-clone for the 386/486 by Linus Torvalds. Read comp.os.linux (or ask me by email if you like) for more information.