Post by David Murray on Jun 7, 2006 9:10:01 GMT -5
www.ccs.neu.edu/home/bchafy/lood.html
Not sure if this belongs on any of the PETSCII boards.. but it was so cool I wanted to stick it on here somewhere.
As you can see in the link, it is appearently possible to drive a television or other composite NTSC device directly from your VGA output with no converter box. The catch is that it is black and white (well, grayscale actually), and you can only run DOS, Linux, or X-Windows. (No Microsoft Windows currently)
I built the cable and ran the TSR on the guy's website and here are two screenshots of DOS programs for you I took from a BT848 capture card:
galaxy22.dyndns.org/lhx.gif
galaxy22.dyndns.org/lw.gif
On my 13" television, it is amazingly clear. I'd say the text is as sharp as an old CGA monitor. (looks better than this capture) I know that doesn't sound like much, but compared to how those VGA to TV converter boxes usually look, this is great. Not only that but the image was perfectly centered on my screen and had no overscan.
My next project will be to rewire the cable for RGB, which should be easy. Then I should be able to output color to my Amiga 1084 monior and my little Sony PS-one LCD screen. It is my eventual hope that I can tweak the dot-clock in Xwindows to setup a resolution that is a 1:1 pixel ratio with my PS-One LCD. This would be great for my shuttlecraft. Then I can use a variety of low-cost, low-power devices to drive this little LCD. I had already planned on having at least one Commodore DTV and at least one PC of some sort that could run a web-browser to at least some extent.
Not sure if this belongs on any of the PETSCII boards.. but it was so cool I wanted to stick it on here somewhere.
As you can see in the link, it is appearently possible to drive a television or other composite NTSC device directly from your VGA output with no converter box. The catch is that it is black and white (well, grayscale actually), and you can only run DOS, Linux, or X-Windows. (No Microsoft Windows currently)
I built the cable and ran the TSR on the guy's website and here are two screenshots of DOS programs for you I took from a BT848 capture card:
galaxy22.dyndns.org/lhx.gif
galaxy22.dyndns.org/lw.gif
On my 13" television, it is amazingly clear. I'd say the text is as sharp as an old CGA monitor. (looks better than this capture) I know that doesn't sound like much, but compared to how those VGA to TV converter boxes usually look, this is great. Not only that but the image was perfectly centered on my screen and had no overscan.
My next project will be to rewire the cable for RGB, which should be easy. Then I should be able to output color to my Amiga 1084 monior and my little Sony PS-one LCD screen. It is my eventual hope that I can tweak the dot-clock in Xwindows to setup a resolution that is a 1:1 pixel ratio with my PS-One LCD. This would be great for my shuttlecraft. Then I can use a variety of low-cost, low-power devices to drive this little LCD. I had already planned on having at least one Commodore DTV and at least one PC of some sort that could run a web-browser to at least some extent.