Inky Posted May 11, 2016 Share Posted May 11, 2016 In the past, I have messed with Hack-o-matic and putzed around with the graphics on a couple 2600 games. I see a few things I'd like to change around with some 7800 games, but not sure how to start with this. Any ideas? Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/ Share on other sites More sharing options...
EricBall Posted May 11, 2016 Share Posted May 11, 2016 Graphics on the 7800 is very different from the 2600, so you're going to need different tools. (Which might exist, who knows?) First, graphics data is laid out "upside down" with the last scanline on the lowest address and each scanline on a separate page. e.g. for a 2 byte x 16 line sprite $e000-$e001 bottom line $e100-$e101 2nd last line ... $ee00-$ee01 2nd line $ef00-$ef01 top line (Sprites are typically 16 or 8 lines high and will be on even 4K (16 line) or even 2K (8 line) address blocks. Second, while sprites on the 2600 are 1 bit per pixel, sprites on the 7800 may be 1, 2 (most common), or 4 bits per pixel depending upon the graphics "mode". The bits from the graphics data are combined with bits in the display list entry to determine if the pixel is transparent or the output color (from a 24 of 256 entry palette). Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3508439 Share on other sites More sharing options...
PacManPlus Posted May 11, 2016 Share Posted May 11, 2016 This reminds me of something I am supposed to be working on... 8 Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3508473 Share on other sites More sharing options...
Dauber Posted May 11, 2016 Share Posted May 11, 2016 This reminds me of something I am supposed to be working on... :-o :-o :-o :-o :-o :-o :-o :-o :-o 2 Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3508487 Share on other sites More sharing options...
Defender_2600 Posted May 11, 2016 Share Posted May 11, 2016 This reminds me of something I am supposed to be working on... :love: !! Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3508514 Share on other sites More sharing options...
PacManPlus Posted May 11, 2016 Share Posted May 11, 2016 (edited) lol - you guys are too funny. Thanks for the vote of confidence. It's actually 7800 development-related, not a game. @Inky - sorry for the de-rail. Only the 320A mode games (i.e. Frenzy, RipOff, etc.) would work with Hack-O-Matic (they would still be upside-down though). I used to use something called "Tile Molester" for the 160A mode games (i.e. the most common mode), but it uses Java (which I hate) and it is a *pain* to set up. One thing to note, however - Ms. Pac-Man (the original 7800 version) is the only one that has the graphics stored differently than every other game. They are not in the page format as Eric described, but the graphics are stored 'vertically' - 8 bits wide but 2bpp (2 bytes per scanline) then moves down to the next scanline. It has to do with the way they display list kernel is made. Bob Edited May 11, 2016 by PacManPlus 2 Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3508528 Share on other sites More sharing options...
DracIsBack Posted May 11, 2016 Share Posted May 11, 2016 lol - you guys are too funny. Thanks for the vote of confidence. It's actually 7800 development-related. @Inky - sorry for the de-rail. I hope you REZOLVE it. :-) Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3508532 Share on other sites More sharing options...
+Atarius Maximus Posted May 11, 2016 Share Posted May 11, 2016 If you'd like to make changes to Pac-Man or Scramble, Jeff Wierer made specific graphics editors just for those two games. You can find them here and here. 1 Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3508557 Share on other sites More sharing options...
Inky Posted May 11, 2016 Author Share Posted May 11, 2016 If you'd like to make changes to Pac-Man or Scramble, Jeff Wierer made specific graphics editors just for those two games. You can find them here and here. I just came across the scramble editor. I may play with that one. Specifically I'd like to try my hand at cleaning up the graphics in Scrapyard Dog, and changing your character in Xenophobe to be more like Dr. Kwak. 1 Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3508560 Share on other sites More sharing options...
Jinks Posted May 12, 2016 Share Posted May 12, 2016 lol - you guys are too funny. Thanks for the vote of confidence. It's actually 7800 development-related, not a game. Bob Did anyone else here the sound of the guy going off the cliff on the cliffhanger price it right game in their head after reading this?? Hi Bob!! Found you!! 1 Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3508795 Share on other sites More sharing options...
PacManPlus Posted May 12, 2016 Share Posted May 12, 2016 Hi Bob!! Found you!! Was I lost? 1 Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3509074 Share on other sites More sharing options...
Jinks Posted May 13, 2016 Share Posted May 13, 2016 Was I lost? Lost without the seventy-eight-hundred. Could be a country song? 1 Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3509784 Share on other sites More sharing options...
gambler172 Posted May 14, 2016 Share Posted May 14, 2016 (edited) I just came across the scramble editor. I may play with that one. Specifically I'd like to try my hand at cleaning up the graphics in Scrapyard Dog, and changing your character in Xenophobe to be more like Dr. Kwak. I just came across the scramble editor. I may play with that one. Specifically I'd like to try my hand at cleaning up the graphics in Scrapyard Dog, and changing your character in Xenophobe to be more like Dr. Kwak. I made a Mario hack and usedScrapyard Dog for it.I never released it. Reason is,that I cannot test all changes cause Scrapyard Dog is damn heavy to play. I used Tilemolester.....only thing..I cannot find is this damn SELLER graphics....all other graphics,I was able to find.So if there is somebody,who could help with the SELLER screen..... greetings Walter Edited May 14, 2016 by gambler172 1 Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3510554 Share on other sites More sharing options...
Mord Posted May 16, 2016 Share Posted May 16, 2016 I made a Mario hack and used Scrapyard Dog for it.I never released it. Reason is,that I cannot test all changes cause Scrapyard Dog is damn heavy to play. I used Tilemolester.....only thing..I cannot find is this damn SELLER graphics....all other graphics,I was able to find.So if there is somebody,who could help with the SELLER screen..... greetings Walter I wouldn't be surprised if the seller graphic was the same graphic used for the silly puzzle at the end of the game. Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3511554 Share on other sites More sharing options...
gambler172 Posted May 16, 2016 Share Posted May 16, 2016 I wouldn't be surprised if the seller graphic was the same graphic used for the silly puzzle at the end of the game. Yep....I found the silly Puzzle....but not the Seller screen Quote Link to comment https://forums.atariage.com/topic/252504-graphics-hacking-where-to-start/#findComment-3511567 Share on other sites More sharing options...
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