Gigatron Hackers

The clock speed will not change the edge of the video, it will only make the Gigatron spit out the signal slower or faster. The more it deviates from 6.25MHz, the more trouble it will give the TV/monitor to sync to the image. But when sync fails, you will get nothing, not just part of the image. Wh...

I think it could just be the monitor/tv or quartz? I have already tested Gigatrons on various monitors and TVs. If they synced badly, then the picture was shifted. I've never had a picture like this before, it's too big on all sides. Why ROMv4? But it has nothing to do with the monitor. I figured o...

bmwtcu wrote: ↑08 Sep 2023, 08:00 suggest trying a native 4:3 monitor (not TV) if possible. Something old enough where 640x480 was actually tested!

Switching between 4:3 and 16:9 aspect ratios does not help.
Will try to search for old monitor.

The monitor from the photo is the smart TV, but I tried simple VGA LED mini-monitor also, the result is the same. I thought about overscan, but did not find such option. I do not have tube monitor or TV.
The crystal is 6.25 MHz, but I cannot make sure that it's frequency is exact.

Hello All, I have built my Gigatron from open-source Gerbers and schematics. The first problem which I faced was fault in the gamepad subsystem. It was not the obvious problem, but I have resolved it. Symptoms : gamepad did not work, I could only see some random cursor movements right after starting...