So here is some issues I found. I have found about 5 more that I need to look into more but they seem the same basic theme as these problems. So I wanted to go ahead and post:
Armored Encounter + Sub Chase (1980)(Philips)(EU-US)
Select game 1 (pressing 1 on keyboard)
The game will start with a 3 minute timer, do nothing and let the game clock run to 0
Notice the core seems to "crash", all lag frames after that and no way to continue,
Pressing "Power" doesn't reboot to a bootable state, have to reboot core
Bowling + Basketball
Press 1 to get to bowling, play and entire game, seems to crash, and need a reboot
Blockout + Breakdown (1981)(Philips)(EU-US)
Lot of sceanline looking issues
Also, hold enter, and the backgrounds start flashing rapidly, I don't think any of this should happen
https://www.youtube.com/watch?v=xBtFOlqG-d0
Consmic Conflict (1980)(Philips)(US)
The center of the screen is flashing black and blue at 30hz. Footage of this game doesn't suggest this happens, but of course a 30fps youtube video wouldn't show that so I can't be 100% sure, but it's pretty bad looking
Great Wall Street Fortune Hunt, The (1983)(Philips)(EU-US)
The stock banners alternate with color and black every other frame. Again, since it is 30hz, footage doesn't necessairly prove the real game doesn't do this, but it seems likely this is a bug
Pinball (USA) (Proto)
This one is a just a prototype so I don't know that this is not game behavior, however the ball can go through the top wall of the screen. I mention it because I know previously there were collision detection issues, so didn't know if this was a potential problem like that
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.
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.
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I did a lot of rework on the ppu and now things are working much better.
Blockout behaves like console now, as does Cosmic Conflict, which is now closer to console then O2EM.
The good thing about Cosmic Conflict and Blockout is that they both do fairly careful timing things but in different ways, so if they are both correct at the same time it's a pretty solid indication that the emulation is close to correct.
A big open end remains in that Blockout turns on HBL interrupts but expects them to not happen. I don't know what's up here, I would need to find a game that actually uses HBL interrupts constructively to do things correctly but so far I can't find one.
Anyway as always more testing is appreciated. I think I'm getting close on NTSC, PAL still needs some work though.
