klasko54 Posted October 2, 2015 Share Posted October 2, 2015 (edited) The original very rare super game Grogs Revenge, by Coleco Canada, was release with a nasty bug. When you use the warp codes listed in the manual for mountain 1, and you warp up to Level E, and went into any cave, the screen went black, and the game froze. Well Thanks to Oscar Toledo, that bug has been repaired using the following modification... From Oscar Toledo, I've analyzed the game and I've trimmed down the bug. 1. The bug happens when entering any cave of level E of mountain 1.2. The game has an internal buffer of 64 bytes.3. The buffer is filled with X+Y+Y elements (shells, stalactites andstalagmites)4. Coleco programmers made a mistake, the total number of elements was57+20+20 = 97, this doesn't fit in the buffer of 64 bytes.5. This is the only level where they made the mistake.6. I've patched it to 16+20+20 = 56 elements. Find annex the patched DDP file (byte $5374 in file changes to $10,this is $b074 in ADAM memory) BTW, the passwords for mountain 1: 2,2-3,3-4,4-5,5-6,6For mountain 2: 2,2-2,3-4,4-4,5-6,2-7,8For mountain 3: 4,2-6,6-7,1-2,3 Now. After fixing that bug, another one popped up where you warped past level E, the game would go into oblivion, and crash. Oscar has fixed that problem too, with the following modification... >>> For block patch this is block #28, sector #3, blk: 93 (it contains $06, patch to>>> $05) and blk: 120 (it contains $06, patch to $04)>>> People who have this game, sealed or not, are going to need these modifications to use the game. So make note of these changes. Any questions, let me Know. I'm on atariage as Klasko54 Edited October 2, 2015 by klasko54 7 Quote Link to comment Share on other sites More sharing options...
Pixelboy Posted October 2, 2015 Share Posted October 2, 2015 Another achievement medal for nanochess! 9 Quote Link to comment Share on other sites More sharing options...
klasko54 Posted October 2, 2015 Author Share Posted October 2, 2015 You got that right Pixelboy. Quote Link to comment Share on other sites More sharing options...
+nanochess Posted October 2, 2015 Share Posted October 2, 2015 It was a good experience to search for these bugs. I'm glad everything went just right. Nothing like the temptation to solve several 30-years old bugs Quote Link to comment Share on other sites More sharing options...
NIAD Posted October 2, 2015 Share Posted October 2, 2015 I've said it before and I'll say it again... The CV & ADAM Community are so blessed to have you! 2 Quote Link to comment Share on other sites More sharing options...
klasko54 Posted October 2, 2015 Author Share Posted October 2, 2015 Jim, did you see the fix he figured out? Genius right? Quote Link to comment Share on other sites More sharing options...
NIAD Posted October 2, 2015 Share Posted October 2, 2015 Jim, did you see the fix he figured out? Genius right? Yep! I haven't had a chance to try it out yet (for that matter, I haven't had a chance to do much retro stuff all summer), but hopefully will have some time this weekend. Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 4, 2015 Share Posted October 4, 2015 Wow, how much time went into finding that! ... Any word on the P versus NP problem? https://en.wikipedia.org/wiki/P_versus_NP_problem The original very rare super game Grogs Revenge, by Coleco Canada, was release with a nasty bug. When you use the warp codes listed in the manual for mountain 1, and you warp up to Level E, and went into any cave, the screen went black, and the game froze. Well Thanks to Oscar Toledo, that bug has been repaired using the following modification... From Oscar Toledo, I've analyzed the game and I've trimmed down the bug. 1. The bug happens when entering any cave of level E of mountain 1.2. The game has an internal buffer of 64 bytes.3. The buffer is filled with X+Y+Y elements (shells, stalactites andstalagmites)4. Coleco programmers made a mistake, the total number of elements was57+20+20 = 97, this doesn't fit in the buffer of 64 bytes.5. This is the only level where they made the mistake.6. I've patched it to 16+20+20 = 56 elements. Find annex the patched DDP file (byte $5374 in file changes to $10,this is $b074 in ADAM memory) BTW, the passwords for mountain 1: 2,2-3,3-4,4-5,5-6,6For mountain 2: 2,2-2,3-4,4-4,5-6,2-7,8For mountain 3: 4,2-6,6-7,1-2,3 Now. After fixing that bug, another one popped up where you warped past level E, the game would go into oblivion, and crash. Oscar has fixed that problem too, with the following modification... >>> For block patch this is block #28, sector #3, blk: 93 (it contains $06, patch to>>> $05) and blk: 120 (it contains $06, patch to $04)>>> People who have this game, sealed or not, are going to need these modifications to use the game. So make note of these changes. Any questions, let me Know. I'm on atariage as Klasko54 Quote Link to comment Share on other sites More sharing options...
NIAD Posted October 4, 2015 Share Posted October 4, 2015 (edited) Wow, how much time went into finding that! ... Any word on the P versus NP problem? The solution to the P versus NP problem is as follows: When you quote a message in your own post, there is no need to quote the whole message especially when it's more than a sentence or two! Edited October 4, 2015 by NIAD 2 Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 4, 2015 Share Posted October 4, 2015 O The solution to the P versus NP problem is as follows: When you quote a message in your own post, there is no need to quote the whole message especially when it's more than a sentence or two! 1 Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 4, 2015 Share Posted October 4, 2015 K The solution to the P versus NP problem is as follows:When you quote a message in your own post, there is no need to quote the whole message especially when it's more than a sentence or two! 1 Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 4, 2015 Share Posted October 4, 2015 The solution to the P versus NP problem is as follows:When you quote a message in your own post, there is no need to quote the whole message especially when it's more than a sentence or two! 1 Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 5, 2015 Share Posted October 5, 2015 S 1 Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 5, 2015 Share Posted October 5, 2015 O S 1 Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 5, 2015 Share Posted October 5, 2015 R O 1 Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 5, 2015 Share Posted October 5, 2015 R R 1 Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 5, 2015 Share Posted October 5, 2015 Y R 1 Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 5, 2015 Share Posted October 5, 2015 N Y 1 Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 5, 2015 Share Posted October 5, 2015 I N 1 Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 5, 2015 Share Posted October 5, 2015 A I 1 Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 5, 2015 Share Posted October 5, 2015 D A 1 Quote Link to comment Share on other sites More sharing options...
NIAD Posted October 5, 2015 Share Posted October 5, 2015 O K Ah shit, to hell with this, it's gonna take too long to quote all your posts!!! I did, however, take the time to "Like" all of them. 1 Quote Link to comment Share on other sites More sharing options...
Tempest Posted October 5, 2015 Share Posted October 5, 2015 Please don't do that. Quote Link to comment Share on other sites More sharing options...
ValkerieSilk Posted October 5, 2015 Share Posted October 5, 2015 Sorry ... But Jim started it and he said the S and the H word! He can't play my Colecovision this Friday! Please don't do that. Quote Link to comment Share on other sites More sharing options...
NIAD Posted October 5, 2015 Share Posted October 5, 2015 Please don't do that. Which post in this thread are you referring too? Quote Link to comment Share on other sites More sharing options...
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