Badwolf wrote: ↑Fri Apr 16, 2021 9:49 pm
Lots of good information in there. I wanted to leave my on-board ROM in place because a) it is actually a complete bastard to remove (it's under the RAM board which is harder to pry off than a dog that's taken a liking to your leg) and b) my expansion's designed to be switched off entirely as it's going to be ages until compatibility is decent enough to even think about having it always on. *
Yeah, I really have no idea why Atari put the ROM underneath the RAM board
But considering how borderline is the timing for "Zero wait states" with the original ROMs, I wonder if Atari tried to blow the fan on it to keep it cooler and make it work, and ultimately gave up and added the wait state jumpers instead
Badwolf wrote: ↑Fri Apr 16, 2021 9:49 pm
*cough* bloody DSP *cough*.
All those chips running on all sorts of different clocks
Badwolf wrote: ↑Fri Apr 16, 2021 9:49 pm
In fact, my 'off' mode is really a slave mode where my (flash) ROM can be reprogrammed. It appears in a different address range that you can write to with a special program. It takes about a minute to reflash 512k and if you flash something unbeatable, you just drop back to 'off' mode with its own ROM.
Having a off mode is always something I always add to my stuff, going back to stock is always useful
Well other than the TF536... I think people will have bigger problems with the fact it as a 030 with TOS206 and trying to run original software before even speed comes into it all.
Badwolf wrote: ↑Fri Apr 16, 2021 9:49 pm
But at least now some of your answers when we were trying to get that low-byte decode working make a lot more sense to me!
Welcome to the party then I guess ?