atariready Posted June 27, 2010 Share Posted June 27, 2010 How come when I play Kool-Aid Man on Stella, it doesn't work right? Kool-Aid Man bounces around in the upper-left corner and cannot be moved. Why? Thanks. Quote Link to comment Share on other sites More sharing options...
+stephena Posted June 27, 2010 Share Posted June 27, 2010 How come when I play Kool-Aid Man on Stella, it doesn't work right? Kool-Aid Man bounces around in the upper-left corner and cannot be moved. Why? Thanks. This is a known problem with the emulation in Stella. There's nothing wrong with the ROM; the emulation is just incomplete in this area. This is being worked on for a future release. Quote Link to comment Share on other sites More sharing options...
+thegoldenband Posted June 27, 2010 Share Posted June 27, 2010 Interesting, I'd run into the same problem many moons ago when I was using some 1.x version of Stella, but I hadn't gotten around to trying it again since. Out of curiosity, what's the technical issue that keeps Kool-Aid Man from moving? And are there any other significant games (i.e. not multicarts or oddball pirates) that are equally broken in Stella, or is Kool-Aid Man the only major title that's not playable? Quote Link to comment Share on other sites More sharing options...
Nukey Shay Posted June 27, 2010 Share Posted June 27, 2010 Try this That hack should work on anything AFAIK (at least I never got any negative feedback about it). It's based on the fix posted to [stella] by Eckhard and Fabrizio waaaay back in 2002...edited to make it Supercharger-compatable. Quote Link to comment Share on other sites More sharing options...
+stephena Posted June 27, 2010 Share Posted June 27, 2010 Interesting, I'd run into the same problem many moons ago when I was using some 1.x version of Stella, but I hadn't gotten around to trying it again since. Out of curiosity, what's the technical issue that keeps Kool-Aid Man from moving? And are there any other significant games (i.e. not multicarts or oddball pirates) that are equally broken in Stella, or is Kool-Aid Man the only major title that's not playable? I'll leave the more in-depth, technical explanation for someone else, but I believe it's related to not quite complete HMOVE emulation. Previously to Stella 3.1, this manifested itself in many ROMs, the most visible being GIJoe (if you test this in older versions of Stella, you'll see it's completely messed up). But since version 3.1, you can see that most (but not all) of these have been fixed. I have a list of about 20-30 ROMs somewhere that still cause some graphical glitches with the current Stella code, and the TIA emulation is being improved to fixed these. But pre-3.1, this list was perhaps 100-200 ROMs, so the emulation is definitely becoming more precise. Kool Aid Man is probably the most visible of the commercial ROMs, since it basically doesn't work at all ... Quote Link to comment Share on other sites More sharing options...
+stephena Posted June 27, 2010 Share Posted June 27, 2010 Try this That hack should work on anything AFAIK (at least I never got any negative feedback about it). It's based on the fix posted to [stella] by Eckhard and Fabrizio waaaay back in 2002...edited to make it Supercharger-compatable. Yes, this ROM is confirmed to work in Stella 3.1.2 (the latest release). In fact, this ROM will be helpful in adding correct support for the other ROM, since it lets me see exactly how things should be working. Quote Link to comment Share on other sites More sharing options...
+Mitch Posted June 27, 2010 Share Posted June 27, 2010 I think Kool-Aid Man also has the same problem on real 2600s that have the buggy TIA chip. Mitch Quote Link to comment Share on other sites More sharing options...
Omegamatrix Posted June 28, 2010 Share Posted June 28, 2010 I think Kool-Aid Man also has the same problem on real 2600s that have the buggy TIA chip. Mitch I have a late release Taiwanese Jr. that has one of these buggy chips. It is my most valuable console because it's great to test games on. Thunderground's score gets messed up on my buggy Jr, but the same Thunderground cartridge plays great on other consoles. I think at one point I wrote a hack that fixed this buggy score. I also found my Jr doesn't like opcode ASR. Too bad, because it was one of my favorite illegal opcodes. Now I won't use because it will fail on other buggy Jr's as well. LAX and SBX do work fine, thank God! Quote Link to comment Share on other sites More sharing options...
Video Posted July 2, 2010 Share Posted July 2, 2010 The game really does that with some later 2600's and a good chunk of 7800's too. I don't know what causes it exactly (shitty programming probably) But as for the emulator, I use Z26, and it runs the game fine, try different emulators. Quote Link to comment Share on other sites More sharing options...
Trebor Posted July 3, 2010 Share Posted July 3, 2010 I use Z26, and it runs the game fine, try different emulators. It plays fine under MESS as well Quote Link to comment Share on other sites More sharing options...
Nukey Shay Posted July 3, 2010 Share Posted July 3, 2010 BTW the original message is here. Certian functions are unreliable when executing too soon after an HMOVE. The description "a bug that was just fortunate to work out right" (on original hardware) is a good one. Quote Link to comment Share on other sites More sharing options...
Arenafoot Posted March 17, 2014 Share Posted March 17, 2014 How come when I play Kool-Aid Man on Stella, it doesn't work right? Kool-Aid Man bounces around in the upper-left corner and cannot be moved. Why? Thanks. I just bought a copy of Kool-Aid Man and tried to play it on my 2600jr (made in tawian) and its doing this same thing......bummer. Wish I would have known about this before buying it. Quote Link to comment Share on other sites More sharing options...
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