26 October 2011, 11:44 | #61 |
Posts: n/a
|
I just wanted to say that's it's great to see that people still enjoy this Amiga game, it sure brings back memories
I don't think I have an Amiga copy left unfortunately But we also made a PC version of the SNAKES game with the same Amiga mods and graphics but you probably have to run it in a tool called DOSbox if you have Windows 7. If someone knows a programmer who would like to convert the SNAKES game to another system e.g. PS3 or do a SNAKES 2 version let me know. Have fun! Kind regards, Marco Victrix software |
27 October 2011, 01:36 | #62 |
Global Moderator
Join Date: Aug 2008
Location: Sidcup, England
Posts: 10,300
|
|
29 October 2011, 00:38 | #63 |
Global Moderator
Join Date: Aug 2008
Location: Sidcup, England
Posts: 10,300
|
As from today, I have exhausted the possibililies of salvaging this disk with my PC equipment using Disk2FDI Registered version, and my Catweasel MK4 and KryoFlux floppy disk controllers with all PC compatible 3½-inch floppy drives I own.
Tomorrow, I shall continue this work using all my Amiga compatible floppy drives fitted to the A1200 I purchased this week from DaveMB running TSGui v2.5b15 and DiskMonTools v3.14 Registered. The Amiga would have been my first choice for this task, but the recent worsening of the video fault on my Commodore A1200 meant that this option was not available until now. |
30 October 2011, 23:23 | #64 |
Registered User
Join Date: Nov 2006
Location: Amigaville
Age: 46
Posts: 3,334
|
Any news Mr. P?
Your efforts should win you the Nobel Peace Prize (can't keep a man (or woman) away from SNAKES!) |
30 October 2011, 23:53 | #65 |
Global Moderator
Join Date: Aug 2008
Location: Sidcup, England
Posts: 10,300
|
This work is underway on my new Amiga setup, but I'm at the point of diminishing returns as far as salvaging the data from the disk is concerned. However, I won't stop until I have exhausted every possibility because this will give greater certainty than trying to reconstruct the missing data.
Even if I don't actually manage to salvage anything new from the disk, it will increase my confidence in what has already been recovered. As soon as I make any progress, I'll be uploading a new WIP disk image. |
31 October 2011, 01:35 | #66 |
Registered User
Join Date: Sep 2008
Location: Gainesville U.S.A.
Posts: 771
|
Snake oil remedy or case of snake byte
Prowler is within one bit, not byte mind you, but bit of having that screen fixed.
|
31 October 2011, 21:26 | #67 | |
Global Moderator
Join Date: Aug 2008
Location: Sidcup, England
Posts: 10,300
|
Quote:
I seem to have fixed another bad sector this evening, but I've not yet had a chance to fix up the WIP disk image. |
|
31 October 2011, 22:26 | #68 |
Registered User
Join Date: Sep 2008
Location: Gainesville U.S.A.
Posts: 771
|
I spent the better part of Saturday afternoon on WIP and the DEMO and made a few interesting discoveries. I didn't want to blab them all over and bias what you're doing. At the same time, I wanted to give others a glimmer of hope. The short answer is yes, I think so. If you want me to write it all up then say the word.
|
31 October 2011, 22:50 | #69 |
Global Moderator
Join Date: Aug 2008
Location: Sidcup, England
Posts: 10,300
|
Yes please, mate!
This thread is open to all who would like to contribute to the effort of preserving this game. That's why I have been regularly updating and sharing the WIP disk images. It had occurred to me that I might find code in the demo version to patch up some of the missing or damaged parts of the full version disk, but I would have investigated that only after I had exhausted the possibilities of salvaging everything the disk contains, because that is by far my greater skill. I'm still making progress on that, but I would certainly welcome a parallel contribution from yourself to fix what I have already salvaged by working with the images I have uploaded - especially if you can provide some explanatory notes to go with it. In the meantime, I'll try to get an updated WIP disk image uploaded ASAP. |
31 October 2011, 23:15 | #70 |
Registered User
Join Date: Sep 2008
Location: Gainesville U.S.A.
Posts: 771
|
Give me half an hour. If there are no intervening posts then it will be here.
EDIT: Prowler - Here are four changes for you to have a look at. Made with wip6. Original byte on left, new on right. 00005DAA: FA FF Look closely at the last S on the snakes logo when first booting. See the two lighter pixels? This change is the new data after repainting. 00007529: DC 5C Fix keyboard selector that caused selector to spring back and also some wrong data to be blitted. Arrived at by comparing DEMO code to WIP code. 0000C268: 05 07 Unscramble opening picture. Arrived at by comparing DEMO data to WIP data. 00051ED8: 30 08 This is just hack of level 15 that replaces the blue mine with another harmless tile. I did transplant the entire level 15 data into the DEMO (300 bytes 20*15 tiles) and it locked up too. So there is a possibility that bug could have always been there. So #1 is a guess but reasonable I think. #2,#3 99% sure. #4 doubtful but better than it was. Last edited by clenched; 31 October 2011 at 23:41. Reason: Continuation of post |
01 November 2011, 00:36 | #71 | ||||||
Global Moderator
Join Date: Aug 2008
Location: Sidcup, England
Posts: 10,300
|
Quote:
Quote:
Quote:
Quote:
Quote:
Quote:
Because change #4 comprises a 3-bit change, I don't think it will reverse disk corruption of the type I am seeing on this disk, so your theory that this bug could always have been there may be a good one. Apart from change #3, which is already included in WIP7, and fixes the title screen at last, I would first like to test the effect of introducing these other changes on the status of the 8 remaining bad sectors before I include them in the next WIP. Last edited by prowler; 01 November 2011 at 21:32. Reason: bits and bytes... |
||||||
01 November 2011, 01:30 | #72 |
Registered User
Join Date: Sep 2008
Location: Gainesville U.S.A.
Posts: 771
|
I have placed the tile data in the Zone for you in case a PC copy ever turns up and a level needs changing.
|
01 November 2011, 03:03 | #73 | |
Phone Homer
Join Date: Jun 2006
Location: 5150
Posts: 5,773
|
Quote:
Maybe the game doesnt save high scores. Second well done guys keep going prowler @clenched I like your style seem to be working quickly finding those addresses especially the level data addresses - make a little Map editor at the end Pc Version http://www.download-central.ws/DOS/Games/S/Snakes!/ I wouldnt be surprise if it was a bug within the game - a lot of levels to test, similar have happend with other games in the past. Welcome Dude and BIG THANKS! for a nice game Last edited by Retro1234; 01 November 2011 at 03:09. |
|
01 November 2011, 03:32 | #74 |
Registered User
Join Date: Sep 2008
Location: Gainesville U.S.A.
Posts: 771
|
I grabbed one off Aminet called Maper that works nicely. Just load the IFF in the Zone into it. When asked for tile dimension give 16x16 and Map dimension 20x15. Build level, Save map, replace the appropriate 300 bytes on the ADF and there you go. I forget exactly where levels start on disk or if they are contiguous or even in sequence. The only reason I bothered was because I noticed the Jolly Roger tile and wondered if it had any special surprises
|
01 November 2011, 04:05 | #75 |
Phone Homer
Join Date: Jun 2006
Location: 5150
Posts: 5,773
|
|
01 November 2011, 21:30 | #76 | ||
Global Moderator
Join Date: Aug 2008
Location: Sidcup, England
Posts: 10,300
|
Quote:
I'm beginning to think it doesn't, unless it's prevented from doing so by some missing data or corruption in the first two tracks. Quote:
I've had the WIP7 disk image running in WinUAE this evening, and the title screen is now as clean as a whistle! (New screenshot attached.) In fact, it exactly matches that of the Demo version! I've incorporated all the changes you contributed into the new WIP8 version. Those two fixes you derived from the Demo version code each fix a bad sector as far as I can tell, but the sector containing the Level 15 bug was good anyway, so it appears that the bug has been there all along, as you suggested. I wonder whether pickaweapon will be able to tell us. I'll leave the change in for now. We might as well fix the bug while we're fixing everything else. I'm assuming you unpacked the Demo code to find those fixes. Can I ask what tool you used to do that? Hey, there are now only six bad sectors to go! |
||
01 November 2011, 22:36 | #77 |
Registered User
Join Date: Nov 2006
Location: Amigaville
Age: 46
Posts: 3,334
|
Great work guys
This game brings back memories in certain ways as it explains why I swore a lot at my Amiga. Gah that sodding computer player who makes me crash into him on purpose |
01 November 2011, 22:46 | #78 |
Registered User
Join Date: Sep 2008
Location: Gainesville U.S.A.
Posts: 771
|
I didn't take the trouble to unpack the demo. It was just visual inspection using WinUAE's debugger and running them both side-by-side.
Last edited by clenched; 02 November 2011 at 14:34. |
02 November 2011, 22:27 | #79 |
Global Moderator
Join Date: Aug 2008
Location: Sidcup, England
Posts: 10,300
|
This evening, I managed to salvage the Snakes disk Cylinder 0 intact to fix another bad sector. Only five to go now!
I'm not sure that this will make any noticeable difference to the game. However, I'm still a little concerned that Highscores are not saved to the disk. If this is caused by disk corruption, then I think that if I could just salvage Cylinder 1 intact as well, then it might well fix that problem. Here for your enjoyment is the WIP9 disk image. All comments and bug reports are welcome as usual. I haven't tested it myself yet. Last edited by prowler; 02 November 2011 at 23:59. |
03 November 2011, 23:20 | #80 |
Global Moderator
Join Date: Aug 2008
Location: Sidcup, England
Posts: 10,300
|
This evening, using another disk drive and TSGui, I managed to salvage both Cylinders 0 and 1 intact. However, for the first time in my experience, there are discrepancies between the apparently valid data captured yesterday and today for Cylinder 0, and these discrepancies can clearly be attributed to corruption of the data in both captures.
Furthermore, there are similar discrepancies between the apparently valid data captured for Cylinder 1 today using TSGui and previously using my KryoFlux setup on my PC. These two cylinders have repeatedly shown this sort of behaviour which gives seemingly valid data captures which turn out to be different from day to day. Using this collection of information, I have tried to construct authentic data to fill the flaky sectors in this region of the disk, and these are the only changes in the WIPA disk image, which I really must get around to testing next... There are still 5 known bad sectors in this disk image, none of which are in the first 15 cylinders, and all of which I suspect will require only trivial changes to fix them but, at this point, I've still not finished trying to salvage this information from the disk. |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
Thread Tools | |
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Snakes/Super Twintris | DeAdLy_cOoKiE | request.Old Rare Games | 1 | 06 August 2023 20:11 |
Looking for a snakes game | lordofchaos | Looking for a game name ? | 4 | 06 January 2012 16:36 |
The One Amiga 59 (Aug 1993) : Snakes game registered? | Rakki | request.Old Rare Games | 3 | 17 July 2011 14:57 |
|
|