Working with VESA 1.2

Another little something I should mention, either for my own reference in the future, or in case someone else comes stumbling through here seeking help with very old graphics cards.

The video card in my Pentium is a horrid old relic, a Chips and Technologies F65548. It’ll actually do a graphical desktop, and I’ve used it for some unusual setups in the past — IceWM, Awesome, even Openbox once or twice (with terrible results :( ). But it’s a slow beast, doesn’t like to work too hard, and would probably rather be sleeping out it’s physical lifespan in the bottom of a landfill, somewhere on Honshu.

Another one of its eccentricities is that it predates VESA 2.0, which is, as I understand it, pretty much the standard for VESA graphics any more. I am not so much a hardware junkie to try and explain that, but suffice to say that it can’t do all the regular framebuffer settings that a machine only a year or two younger can do.

The consequence is that I’m left with a sort of “porthole” effect, with basically a 640×480 lit area surrounded by a black frame. It’s not a terribly annoying thing, but it does irritate me for wasted screen space.

The alternatives are to run X on the machine, which is possible but somewhat sluggish. X, for all its faults, doesn’t seem to have a problem utilizing the entire screen. Which means I could conceivably run Awesome and take advantage of the full 800×600.

On the other hand, I could stick to the console, suffer the frame effect and get as much speed as possible out of a 100Mhz machine. So my choices are, screen space or speed?

Lately I’ve been sticking to speed, because I found a small loophole in the situation. I accidentally fed it the wrong VGA setting one day, and booted to a prompt asking me for a correction to the video mode. And an option to “scan” for other modes.

Making a long story short, I found I could force-feed the kernel line an 80×34 textmode screen, which pops the frame effect out a little bit, and gives me more area to work with. If you find your way to the same screen setup menu and find a mode you want to keep, add it to the kernel line with vga=0xHEX, where HEX is the three-digit code for the dimensions you want.

Once that was working, I could change the terminal font to a 14-point Terminus (12-point won’t work for me), and get a few more lines around the bottom.

So in short, picking a video mode with extra lines forced the graphics system to open up a little bit, and picking a different font gave me more lines still. Add screen and dvtm, a few extra frills, and I can enjoy a little more space without suffering a heavy drag on a machine that has very little speed to start with.

In any case, if you have a machine that refuses to play nicely with the newer framebuffer settings (and I say that knowing full well that anyone in the same boat as me is extremely rare), you might try that trick, and see if it helps. :)

P.S.: I’d show you a screenshot, but … there’s no framebuffer, remember? :P

About these ads

6 Responses to “Working with VESA 1.2”


  1. 1 thealphanerd 2009/04/20 at 7:31 PM

    Try shrinking the screen to a smaller monitor. At least they’re not fat letters.

  2. 2 thealphanerd 2009/04/20 at 7:38 PM

    There is also two ways for screenshots:

    1. Find some way to print the terminal output on a printer, then scan it. Requires cups and sane.

    2. Get xorg, and fire up an xterm session.

  3. 3 Mulenmar 2009/05/20 at 5:06 PM

    This is probably something you’ve already considered, but have you tried building a custom framebuffer-only Xserver for it? Not something I could do — yet, anyway 8~J — but if you could and show us how, it would be beyond awesome.


  1. 1 Do more with less « Motho ke motho ka botho Trackback on 2009/05/10 at 8:14 PM
  2. 2 An apology, and an update « Motho ke motho ka botho Trackback on 2009/05/17 at 9:01 PM
  3. 3 Life just isn’t fair « Motho ke motho ka botho Trackback on 2009/12/11 at 9:30 PM

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s




Welcome!



Visit the Wiki!

Some recent desktops


May 6, 2011
Musca 0.9.24 on Crux Linux
150Mhz Pentium 96Mb 8Gb CF
 


May 14, 2011
IceWM 1.2.37 and Arch Linux
L2300 core duo 3Gb 320Gb

Some recent games


Apr. 21, 2011
Oolite on Xubuntu 11.04
L2300 core duo 3Gb 320Gb

Enter your email address to subscribe to this blog and receive notifications of new posts.

Join 405 other followers

License

This work is licensed under the GNU Free Documentation License. Please see the About page for details.

Blog Stats

  • 3,960,053 hits

Archives


Follow

Get every new post delivered to your Inbox.

Join 405 other followers

%d bloggers like this: