Linux on obsolete displays

posted Jun 2nd 2006 5:00am by
filed under: pcs hacks

linux on obsolete displays

[bryan chafy] has been hacking away to get older non VGA displays running on VGA hardware without using a scan converter. You can pick these old grayscales up for cheap or even free. The tricky part is modifying the BIOS to reprogram the VGA card to output a sync and scanrate that is NTSC compliant. He’s managed to do this with a WYSE Winterm thin-client. Another clever trick is the poor man’s triple head display which stores a different image in each portion of the RGB signal.



14 Responses to Linux on obsolete displays

  • olliestyles says:

    firsttttttt

  • olliestyles says:

    firsttttttt

  • Kabuki says:

    That’s pretty f-ing cool… Think about this, too… Using the triple head method would also be a great way to independently drive each CRT of an older Rear Projector bigscreen television. That would be pretty nifty…

  • Mac Cody says:

    Re #3: An interesting idea springs from this: Just use two of the color guns of the old rear projector big screen television (say red and blue). Then, make some glasses with a red and a blue filter for each eye. Finally display left-hand and right-hand images. You’ll have a cheap big-screen 3D-TV! It boggles the mind! ;)

  • Shadyman says:

    What is pictured looks to be the cheapy $27 black-and-white antenna-driven TV from walmart. That has (inexpensive) possibilities.

  • dreamlayers says:

    Don’t just think of the small TVs. You can also use large old workstation monitors. You can get those cheaply or even for free. I could get them for $15 each or less at a university surplus sale.

    I was using a 19″ monitor from a Sun workstation for a while. The ATI Mach64 drivers allowed me to customize the refresh rate in Windows. Linux allows customization via SVGATextMode and XF86Config. I wanted to use the monitor for DOS too so I wrote a TSR and later converted it to a BIOS extension which I burned to an EPROM that I put in the network card. svgatextmode and x drivers for the card provided all the information I needed to write that tsr.

  • Wow, this IS cool!
    Linux makes old hardware cool.

  • John says:

    I used to have some old 27 inch NTSC displays from an airport that this would have been perfect for.

  • Hi, that was C00L, but modifying the VGACard Bios isn’t new. I have to done it to make it work with the Arcade Monitor. All people who has a PC inside his Arcade Machine has to done this (or buy an expensive VGACard…)

  • bchafy says:

    > What is pictured looks to be the cheapy $27
    > black-and-white antenna-driven TV from
    > walmart.

    The TV I used was a Coby CX-TV1
    ~$18 at amazon.
    athough Ive seen the exact same model under different names (newtech, memorex, etx). It has composite input.

    > but modifying the VGACard Bios isn’t new. I
    > have to done it to make it work with the
    > Arcade Monitor. All people who has a PC
    > inside his Arcade Machine has to done this

    Any links to this, these people, or an image? Some other places Ive found to be somewhat helpful are http://www.wimsbios.com http://www.biosmods.com and http://www.mameworld.net/pc2jamma/monitors.html

  • David Murray says:

    Are there any other websites out there devoted to using the VGA card to drive composite video in this manner? I’m really interested in exploring this as a possible display method for small screens inside my shuttlecraft project (as seen in this video)

    http://video.google.com/videoplay?docid=-4443903857241324322

    Please point me to any websites.

  • don says:

    Very nice!

    btw, the Coby sets (among the dozens of cheapie brands selling that design) can be had for less than $10 in some electronics stores. Otherwise, a neighbor’s junked console TV wouldn’t be bad either.

  • Spencer says:

    Would it be possible to rig up a similar cable for converting a composite or component signal to VGA?

    I’ve got a dual-VGA-input flatpanel that I’d like to try things with….

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