though I have found it is the ROM which is tripping up here. I'm not really surprised as the timings were very tight even for 32 MHz. I have added tiny wait states into the ROM part of the GAL. A couple tests run just 1% slower, and now seems a lot more stable.I think realistically 40 MHz is what I found before being the max speed it can run at. Though this does not mean it will run at this speed on every machine. Only thing I could do is create a tiny clock board with 35 and 40 MHz oscillators on it. Basically just have a jumper to select the oscillator.
I don't really want to mash on a 40 MHz oscillator directly onto the booster as it may not work on every machine. Tolerances of every part will obviously add up and vary considerably across machines. So I think a small add-on board is the only way to go. Of course people can still use the motherboards 32 MHz line if they want to play safe anyway.
Though I am trying to move away from using the motherboards 32 MHz line is running the wire across the motherboard is causing some interference and some stability issues. Of course this has been known right from the start, but I would rather try and avoid the problem altogether.
