Forgot to mention that I'll open-source this project eventually.

Has it really only been less than a month since I updated this thread? It feels like so long. So I've got the new boards, which I'm calling v1 as this revision has everything on it that I wanted to put on it, hence it's not really a research prototype anymore, it'll hopefully be a reliable unit. Fit...

I'm not sure what the go was with that MSense thing, but it went away after a bit of refactoring and hasn't come back. Actually I've had this running for a few nights playing Monkey Island, Civilization, and Quest for Glory 1, and just copying files around, without any data errors. So I think this t...

The way to do this would be to use a scandoubler or similar device. Your main options are the newer and better OSSC (open source scan converter), and the older, cheaper, GBS-8220 devices. The GBS-8220 works by sampling the whole image at the native frequency, but playing it back at a different frame...

Might indeed be a bug, but not necessarily so. It might as well be just a timing issue. At least you're adding a mux into a (probably already timing critical) combinational circuit that might cause that bit of delay that makes the signal missing the next register (probably an I/O cell?) in time (La...

It is impossible to work with tools that you don't trust. Might be the compiler or might be not, but you have to use known good, reliable, tools. I understand from what you are saying that you usually develop on Linux and compiling on Windows might be a bit problematic for you. Use a VM to run Wind...

There isn't some stupid "optimisation" settings for the compiler is there ? I've had compilers make "innocent" changes and screw things up before. I have to compile with no optimsations with my SEC booster for example. But 99% of the time, it's fine to optimise. There are thousa...

So, is the unit actually running any "code" internally, such as a state machine? I say this as this looks awfully like a memory corruption error due to off-by-one or similar array bounds issues, especially if minor changes of the code breaks things. This is a classic writing to the wrong ...

I did get the counter to begin remaining stable, just by randomly changing things until it worked. But only at the expense of disabling the boot-up logo. I assume you're resetting the lines every VBL? If so there's no long running counter that could be affected by "warm up over time". I co...

OK so I got this version 0.7 board stuck together now, in exciting purple this time. IMG20240311154854.jpg It basically works when I first power it up, but then gets more glitchy over time as it warms up. That is exactly the same as the previous board, which I assumed was because it had marginal tim...