Wilheim Posted August 31, 2021 Share Posted August 31, 2021 18 hours ago, rensoup said: The thing is, with the extended RAM window overlapping the ROM one, I don't see how this would work without changes... and if doing changes, then might as well make it work with existing schemes. The background graphics use extended RAM bank 0 at $4000 for instance and get plotted to the screen at $Bxxx so with your scheme that doesn't work anymore. I understand. Unfortunately, the cartridge area is restricted to $8000-$BFFF. By my side, I will continue developing this project. In case the cartridge works and if you don't mind, I would take a look if it's possible to convert it to this cartridge model. Quote Link to comment Share on other sites More sharing options...
rensoup Posted August 31, 2021 Author Share Posted August 31, 2021 3 hours ago, Wilheim said: I understand. Unfortunately, the cartridge area is restricted to $8000-$BFFF. By my side, I will continue developing this project. In case the cartridge works and if you don't mind, I would take a look if it's possible to convert it to this cartridge model. Seems a little crazy to make a cart for a single game but it's your time after all... 1 1 Quote Link to comment Share on other sites More sharing options...
rensoup Posted September 5, 2021 Author Share Posted September 5, 2021 On 8/31/2021 at 12:36 AM, Luke210 said: Yup, i've also experienced this bug On 8/31/2021 at 1:11 PM, Level42 said: Sadly I have neither of those machines....and I lack the time to install emulators etc. Finally got around taking a look at this... it is a game bug and occurs on the C64 as well. Outcome is different though... you fall through the floor never to reappear on the XL but on the C64, the position byte wraps and you end up falling from the ceiling and die after landing on the top floor. I don't know if I'll attempt to fix this because of possible knock-on effects... 2 Quote Link to comment Share on other sites More sharing options...
VinsCool Posted September 5, 2021 Share Posted September 5, 2021 17 hours ago, rensoup said: Finally got around taking a look at this... it is a game bug and occurs on the C64 as well. Outcome is different though... you fall through the floor never to reappear on the XL but on the C64, the position byte wraps and you end up falling from the ceiling and die after landing on the top floor. I don't know if I'll attempt to fix this because of possible knock-on effects... Could it be possible to add some sort of boundary checks where if the player is outside of the screen, it's triggering an instant warp back to the last valid position on the screen (eg the spikes) to prevent getting softlocked? Or is that too much of a big change to the engine to a point more things would break as a result? Quote Link to comment Share on other sites More sharing options...
rensoup Posted September 5, 2021 Author Share Posted September 5, 2021 1 hour ago, VinsCool said: Could it be possible to add some sort of boundary checks where if the player is outside of the screen, it's triggering an instant warp back to the last valid position on the screen (eg the spikes) to prevent getting softlocked? Or is that too much of a big change to the engine to a point more things would break as a result? That sounds crazy ?. The player being outside the screen can be a valid position, just hang from a ledge which is on the bottom floor and you're outside (the player base Y coordinate is at its feet) 1 Quote Link to comment Share on other sites More sharing options...
rensoup Posted September 5, 2021 Author Share Posted September 5, 2021 On 8/30/2021 at 9:24 PM, Level42 said: After this there was nothing I could do but reload the game. I managed to reproduce the exact same thing happening on the next run. I might be able to film it if necessary.... Strange, while both characters disappear, I get the death tune and I'm able to start over... spikebug.mp4 Quote Link to comment Share on other sites More sharing options...
Level42 Posted September 5, 2021 Share Posted September 5, 2021 34 minutes ago, rensoup said: Strange, while both characters disappear, I get the death tune and I'm able to start over... spikebug.mp4 Sadly I can’t see videos posted directly in the forum (IOS devices). I’ll see if I have some time tomorrow to film what happens here… Quote Link to comment Share on other sites More sharing options...
Rybags Posted September 6, 2021 Share Posted September 6, 2021 That video doesn't show here either - Win 7 over 3 different browsers. Quote Link to comment Share on other sites More sharing options...
rensoup Posted September 6, 2021 Author Share Posted September 6, 2021 1 hour ago, Rybags said: That video doesn't show here either - Win 7 over 3 different browsers. It's h264 output from Altirra. Try Brave ? C64 version... (h264 from the same machine but compressed with different software) spikebugc64.mp4 4 Quote Link to comment Share on other sites More sharing options...
Rybags Posted September 6, 2021 Share Posted September 6, 2021 That one works. And no thanks, I use Firefox. Not interested in yet another 3rd party Chrome based browser. 6 Quote Link to comment Share on other sites More sharing options...
VinsCool Posted September 6, 2021 Share Posted September 6, 2021 4 hours ago, rensoup said: It's h264 output from Altirra. Try Brave ? C64 version... (h264 from the same machine but compressed with different software) spikebugc64.mp4 545.22 kB · 0 downloads Not gonna lie this is hilarious LOL 1 Quote Link to comment Share on other sites More sharing options...
xxl Posted September 6, 2021 Share Posted September 6, 2021 can you put a savestate out of this error? I can't duplicate it. atarivid.avi Quote Link to comment Share on other sites More sharing options...
tjlazer Posted September 6, 2021 Share Posted September 6, 2021 On 8/31/2021 at 2:35 PM, rensoup said: Seems a little crazy to make a cart for a single game but it's your time after all... Other companies did that with some of their Game Cartridges too, like Nintendo. Quote Link to comment Share on other sites More sharing options...
rensoup Posted September 6, 2021 Author Share Posted September 6, 2021 15 hours ago, xxl said: can you put a savestate out of this error? I can't duplicate it. atarivid.avi it's pretty simple: -enter screen from bottom entrance -climb up to second floor -wait for fighting stance -move 1 step forward -parry (UP UP UP UP UP UP ...) Quote Link to comment Share on other sites More sharing options...
rensoup Posted September 6, 2021 Author Share Posted September 6, 2021 3 hours ago, tjlazer said: Other companies did that with some of their Game Cartridges too, like Nintendo. You mean like Starfox which sold 3 million copies ? It does make more sense if your projected sales are between "insane" and "it prints money!" 1 2 Quote Link to comment Share on other sites More sharing options...
rensoup Posted September 6, 2021 Author Share Posted September 6, 2021 In other news, it doesn't look like I've got anymore code to add... Just waiting for assets ( You know who you are ? ) 8 Quote Link to comment Share on other sites More sharing options...
Wilheim Posted September 7, 2021 Share Posted September 7, 2021 2 hours ago, rensoup said: You mean like Starfox which sold 3 million copies ? It does make more sense if your projected sales are between "insane" and "it prints money!" Nah, just trying to give my 2 cents. I do really appreciate your efforts, and that encourages me to bring my help anyway I can. 1 Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted September 7, 2021 Share Posted September 7, 2021 on real machine I couldn't get it to fail, perhaps not Atari ROM but Altirra rom instead? (vice verso) or some other such issue? 1 Quote Link to comment Share on other sites More sharing options...
xxl Posted September 7, 2021 Share Posted September 7, 2021 11 hours ago, rensoup said: it's pretty simple: -enter screen from bottom entrance -climb up to second floor -wait for fighting stance -move 1 step forward -parry (UP UP UP UP UP UP ...) for me this error is not manifested. could someone do a savestate right before pushing the hero onto the spikes? Quote Link to comment Share on other sites More sharing options...
rensoup Posted September 7, 2021 Author Share Posted September 7, 2021 20 hours ago, Wilheim said: Nah, just trying to give my 2 cents. I do really appreciate your efforts, and that encourages me to bring my help anyway I can. Thanks, although I think a cart designed for a single game should really allow the game to do more than what would be possible without it, in this case it is already possible to make PoP run with 64KB of RAM without any RAM expansion, it's more work but your cart is extra work too because ROM & RAM windows overlap. Didn't know earlier that they couldn't be moved. It would have been nice to have a RAM cart usable with any software (although I guess it would been done decades ago had it been possible) Quote Link to comment Share on other sites More sharing options...
rensoup Posted September 7, 2021 Author Share Posted September 7, 2021 20 hours ago, _The Doctor__ said: on real machine I couldn't get it to fail, perhaps not Atari ROM but Altirra rom instead? (vice verso) or some other such issue? It looks like @Level42 got it on a real machine though... plus it happens with the C64 version too. Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted September 7, 2021 Share Posted September 7, 2021 (edited) so it's an original bug from back in the day rather to say since inception? Edited September 7, 2021 by _The Doctor__ Quote Link to comment Share on other sites More sharing options...
Wrathchild Posted September 7, 2021 Share Posted September 7, 2021 59 minutes ago, rensoup said: a cart designed for a single game Obviously it isn't, its a variant model that simply has potential for lots of other things, PoP just being the first Quote Link to comment Share on other sites More sharing options...
Kyle22 Posted September 8, 2021 Share Posted September 8, 2021 On 9/5/2021 at 9:55 PM, rensoup said: It's h264 output from Altirra. Try Brave ? C64 version... (h264 from the same machine but compressed with different software) It plays perfectly on FireFox Win XP32. spikebugc64.mp4 545.22 kB · 1 download Quote Link to comment Share on other sites More sharing options...
rensoup Posted September 8, 2021 Author Share Posted September 8, 2021 4 hours ago, _The Doctor__ said: so it's an original bug from back in the day rather to say since inception? The C64 version was started by hacking the A2 version so yeah... there are many bugs in the original, not a surprise given its complexity. Quote Link to comment Share on other sites More sharing options...
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