Sharp MZ

Finally the demo I've been working on is finished, thanks to everyone here on the forums for their help! Youtube video MZF binary Technically it a bunch of standard "demoscene" effects, trying to optimize as best as I could with interleaved VRAM access and stack abuse to get as much speed ...

hlide wrote: ↑Tue Aug 18, 2020 9:45 am Did you check with "wt"?

Yeah, bug appearing when going from 83->84, same as with your modded MZ700 emu, so those match up nicely.

Just got a mail from the author of mz800emu - he had recently hooked up his logic analyzer to an MZ700 to really dig into the details of the timing, and then updated his emulator accordingly!
I ran some quick tests with the latest snapshot build, and it seems very accurate so far.

Thanks! I ran a test with my in-development stuff where I first noticed that the emulators were running too fast, but this new version much better matches the real HW. Great job hlide!

Nice, I'd like to try it out, can you post the win-binary somewhere, I don't have the Visual C setup required to build it myself?

Looks like you are making some great progress, and even if it might not be cycle perfect, it will be a big step up in correctness compared to current emulators!

Running code from VRAM to me sounds like a very theoretical case, no sane person would put code in the 4kb where it runs slow, when you have 64kb where it will run fast, so I'd say that can be ignored for now! Nice to see that you still haven't given up on this, while I agree with you that it's look...

It's interesting that you machine is stable at 83 cycles, I get stable no-bug at 82, but flickering bugs at 83 already. Anyway, what I gather from your investigations is that: 1) Emulator had wrong number of free cycles from the begining (91 vs 82/83) 2) Even with corrected number of cycles, it will...

It's very interesting following your work hlide, unfortunately I have far from enough knowledge about the internal signals to come with any meaningful input. In your current test compile of PAL EmuZ-700, how many cycles per line is VRAM-accessible? A while ago MooZ sent me this link: https://twitter...

Perhaps patching in proper MZ-700 timing support to Chakys MZ-800 emulator would be an easier alternative? I don't have the setup to compile it, but I did download the source code and poke around a bit, but I have to admit that I got totally lost after a while. Also, given that it is an MZ-800 emula...