Now we get to the fun part, where I have probably mucked things up. Opting not to bother with an un-f*ck board, I've attempted to rewire the video output on the board. I looked at the un-f*ck PCB layout and attempted to duplicate the rerouting myself ...
- IMG_20190725_185521.jpg (66.13 KiB) Viewed 4531 times
- IMG_20190725_185532.jpg (45.49 KiB) Viewed 4531 times
After doing this, I tried to power up the board for the first time (realised later I probably should have been testing it all along, since obviously none of the fixes on this board was repairing a fatal problem, but live and learn...). When my monitor (Dell 2001FP, 15 kHz-capable) did not seem to receive any sync, I started thinking about my rewiring and entertaining the idea that I'd gotten the whole port reversed, mirror image. So I swapped the hsync and vsync connections (above photo is after the swap), figuring even if the rest of the port is also reversed, I'd probably at least get sync on the monitor. No joy.
So that's where I am at the moment. Nothing explodes when it's powered up, but there's also no real sign of life. However there is *something* alive, because this is what I'm seeing on the vsync output ...
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So, I'm still pondering what's going on, and what may still be wrong. (Something is certainly wrong with the monitor output now, since I've swapped hsync and vsync and nothing else, but I don't currently know which parts are wrong.)
Depending on where this goes from here, I may just move on to a Rev. H board. ;D
But of course I am keen to learn or I wouldn't be here.
