Maybe we should have a vote on desired core? Like poll results? I would really love to see PCem ported to bizhawk. With waterbox there shouldnt be any desync issues. If PPSSPP is easier to integrate, I would vote on that instead.
Can you give us some links containing the resources/materials necessary for studying then? Because for someone starting from zero like me, I'd appreciate some directions at least. Just information that'd be relevant to fixing the core is enough.
Can we also look into porting Mednafen’s PCE core into bizhawk to replace PCEHawk?
I would like to see a new Genesis core that could hit cycle accuarcy, like a BlastEm port or something. That's probably going to be difficult to do though.
Personally, I think a working TAS-capable Amiga emulator would be amazing; the workflow in recording games for the system is so long-winded without re-recording.
Here are the systems currently missing in Bizhawk that I'm looking forward to the most: ... MSX OpenMSX/BlueMSX could be ported over, but since you want to develop something in-house I guess that's out of question. I remember you once said all the components for a MSX core are already there, and it's just a matter of stitching them together. So maybe this one wouldn't be super hard? ... That's it. As a side note, I know this has already been said many times, but if you can reserve a bit of time to improve PCEHawk and bring it closer to Mednafen levels of accuracy, it'd be much appreciated. That core is in pretty bad shape.
+1 for X68000 and PC-98, these are systems that I would definitely use.
Developing emulation for these from scratch looks like a waste of time to me if instead existing emulators could be improved and reused.
Some in the discord server agree that they want PSP support.
local HIT_T = true;
local do_once_temp = true;
local i = 0;
local j = 0;
local k = 0;
local l = 0;
while (HIT_T == true) do
if (do_once_temp) then
savestate.loadslot(1);
do_once_temp = false;
end
i = math.random(0,4);
if (i == 0) then
joypad.setfrommnemonicstr("|..|.......A|");
end
if (i == 1) then
joypad.setfrommnemonicstr("|..|......B.|");
end
if (i == 2) then
joypad.setfrommnemonicstr("|..|....S...|");
end
if (i == 3) then
joypad.setfrommnemonicstr("|..|........|");
end
if (i == 4) then
joypad.setfrommnemonicstr("|..|......BA|");
end
if (emu.framecount() == 800) then
console.write(memory.readbyte(0x0661));
console.write('-');
console.write(memory.readbyte(0x065F));
console.write('\n');
l = l + 1;
savestate.loadslot(1);
end
emu.frameadvance()
end
This core is shaping up and starting to approach release levels of accuracy.
The biggest problem I'm facing right now is that various homebrew's I test don't look right compared to O2EM, but I'm not confident that O2EM is truly representative of hardware.
At this point if anyone is willing to do some beta testing with some actual retail Odyssey2 games I would appreciate any bug reports.
TASing should be in full working order at this point.
Now that I have this core more in working order I thought I'd make a thread for it. there are still numerous bugs to fix but things are slowly coming together. Some games are now completely playable, but it will probably be another couple of weeks before this core can be declared ready for TAS production.
Small update on Odyssey2. A lot of things are getting cleaned up and into a functional state. I can get in game with controller support now. A lot of things don't work yet but things are progressing at a reasonable pace.
It turns out that this system is quite cumbersome. The PPU is very unconventional and un-intuitive, and the input/output functions of the CPU are used in tricky ways. Good thing there is good documentation or I would be quite lost.