General Category > LisaList2
RGBTOHDMI understands the Lisa video signal
ried:
Tom, how are you physically connecting the Lisa's composite video out port to the RGBtoHDMI device? Are you using a composite to 9-pin adapter, or something different? Thanks in advance.
stepleton:
I basically bought a device that has a composite input, so I don't recall too much in the way of details. Let me go and have a look...
...and I'm still a bit in the dark. What I bought was this thing: https://www.sellmyretro.com/offer/details/63615 , which appears to have made use of this thing or an earlier variant of it: https://www.tindie.com/products/c0pperdragon/rgbtohdmi-mono-lumacode/ . The person who makes that thing says "Due to tax reasons, and to avoid exceeding certain yearly revenue limits, I have to stop all sales for the rest of 2024. Sorry." But 2025 is just around the corner...
The description for that project says: "This board combines a basic RGBtoHDMI board with the features of the analog add-on that are relevant for monochrome input. So it is substantially cheaper than the combination of the existing two. Also a detachable cable is already provided." So if you can't wait, it sounds like you can get a working setup by using the "main branch" RGBtoHDMI and plugging the "analog board" into it.
iJol:
--- Quote from: patrick on October 24, 2023, 02:50:36 am ---In the event of a dead CRT, use some other 12" paperwhite tube as a replacement. E.g. from an Atari SM124 monitor. These have better brightness and focus than the original Clinton tube used by Apple.
In the event of some other hardware issue, just install LisaEm on your Raspberry ;)
--- End quote ---
Sorry for off-topic, but should this work? My Lisa 2/10 CRT is pretty worn out and I want to replace it for a year now. The Atari monitors are quite cheap here so if this work I'll try it out. :D
patrick:
Yes, the Atari CRT (Goldstar 310KAB4K) runs perfectly in the Lisa. One of my machines had heavy burn-in marks as a result of a defective vertical deflection. It now has just such a tube in it.
You have to keep the original deflection yoke from your Lisa. To rotate the picture, rotate the yoke assembly. To move the picture, use the two ring magnets at the CRT neck. Rotate them together or against each other until you have best geometry, then use the pots on the Video Board for fine tuning.
ried:
Thanks to the brilliant folks on this forum, even I was able to get the RGBtoHDMI up and running:
I thought it would be fun to use an Apple Studio Display (DVI) to match the Lisa's translucent bezel, so went with a Lisa component video > RGBtoHDMI > HDMI to DVI converter to create the result seen here. 1024 x 768 isn't a perfect way to show off Lisa Office System's geometry, of course. But it's certainly usable and looks neat.
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