PacManPlus Posted December 15, 2008 Share Posted December 15, 2008 (edited) Hi All: I read somewhere (can't seem to find it now) that someone got RoF running on a 100339 (Hat Trick) Cart. I can't seem to get this to work for the life of me. I have the RAM in U4, the EPROM in U1, and the A8 line of the RAM chip disconnected. I tried reading the schematic to see which jumpers to set (W1-W8) but no matter which combination I *think* should work I either get to startup at all, or the standard garbage window from the cockpit. Has anyone been able to get this to work ever? Even on another (595) board maybe? Thanks for the help, Bob Edited December 15, 2008 by PacManPlus Quote Link to comment Share on other sites More sharing options...
CPUWIZ Posted December 15, 2008 Share Posted December 15, 2008 In case you are interested, Plutos and Sirius do not work on 339's either, not sure about ROF. Quote Link to comment Share on other sites More sharing options...
gambler172 Posted December 15, 2008 Share Posted December 15, 2008 Hi Bob Ask Shawn Sr. He can tell you,how to burn it on cart.Because he made one for me..... greetings Walter Quote Link to comment Share on other sites More sharing options...
Shawn Posted December 16, 2008 Share Posted December 16, 2008 Hi BobAsk Shawn Sr. He can tell you,how to burn it on cart.Because he made one for me..... greetings Walter I'm lucky to remember what I did 4 minutes ago let alone 4 years ago Quote Link to comment Share on other sites More sharing options...
gdement Posted December 16, 2008 Share Posted December 16, 2008 According to other posts I've read that the C100339 has problems with the RAM. However, Atari put some copies of Winter Games on that cart, and apparently reworked the board to make it work properly. I'm not sure if there were other changes, but I noticed this on my copy: I took that picture with a very bad camera. Notice that pins 10-11 of the 74LS10 are connected. The schematic shows pin 11 was originally connected to other parts of the circuit, but on this version it's lifted off the board and shorted to pin 10. According to my notes they connect to +5v. I determined that this reworked board works fine with RAM games, but I have no idea if that's the problem affecting Fractulus. Quote Link to comment Share on other sites More sharing options...
+Mitch Posted December 16, 2008 Share Posted December 16, 2008 Notice that pins 10-11 of the 74LS10 are connected. The schematic shows pin 11 was originally connected to other parts of the circuit, but on this version it's lifted off the board and shorted to pin 10. According to my notes they connect to +5v. I determined that this reworked board works fine with RAM games, but I have no idea if that's the problem affecting Fractulus. This change makes it work with some RAM games but not all. Mitch Quote Link to comment Share on other sites More sharing options...
PacManPlus Posted December 16, 2008 Author Share Posted December 16, 2008 (edited) hmmm... Ok, I only moved it to the 339 board because I still couldn't get it to work with a 595. I'm guessing at this point that RoF will not work (with RAM, and the cockpit showing correctly) on any pre-existing board because of the odd setup. Thanks guys, Bob Edited December 16, 2008 by PacManPlus Quote Link to comment Share on other sites More sharing options...
CPUWIZ Posted December 16, 2008 Share Posted December 16, 2008 Notice that pins 10-11 of the 74LS10 are connected. The schematic shows pin 11 was originally connected to other parts of the circuit, but on this version it's lifted off the board and shorted to pin 10. According to my notes they connect to +5v. I determined that this reworked board works fine with RAM games, but I have no idea if that's the problem affecting Fractulus. This change makes it work with some RAM games but not all. Mitch Yep, doesn't work on Sirius and Plutos. Quote Link to comment Share on other sites More sharing options...
CPUWIZ Posted December 16, 2008 Share Posted December 16, 2008 hmmm... Ok, I only moved it to the 339 board because I still couldn't get it to work with a 595. I'm guessing at this point that RoF will not work (with RAM, and the cockpit showing correctly) on any pre-existing board because of the odd setup. Thanks guys, Bob Stupid question, but could it be that it requires more than 8K of RAM, like Sirius and Plutos? I've never looked at ROF. Quote Link to comment Share on other sites More sharing options...
Shawn Posted December 16, 2008 Share Posted December 16, 2008 (edited) hmmm... Ok, I only moved it to the 339 board because I still couldn't get it to work with a 595. I'm guessing at this point that RoF will not work (with RAM, and the cockpit showing correctly) on any pre-existing board because of the odd setup. Thanks guys, Bob Stupid question, but could it be that it requires more than 8K of RAM, like Sirius and Plutos? I've never looked at ROF. needs 16k (or maybe 24k??) IIRC. But it doesn't help that much as there is still a single line of garbage in middle of the cockpit. I've made most of my ROF with no ram at all cause the proto is so early it's prone to crashing no matter how you set it up. Edited December 16, 2008 by Shawn Sr. Quote Link to comment Share on other sites More sharing options...
+Mitch Posted December 16, 2008 Share Posted December 16, 2008 hmmm... Ok, I only moved it to the 339 board because I still couldn't get it to work with a 595. I'm guessing at this point that RoF will not work (with RAM, and the cockpit showing correctly) on any pre-existing board because of the odd setup. Thanks guys, Bob Stupid question, but could it be that it requires more than 8K of RAM, like Sirius and Plutos? I've never looked at ROF. The original ROF proto has a 2K RAM chip. Mitch Quote Link to comment Share on other sites More sharing options...
CPUWIZ Posted December 16, 2008 Share Posted December 16, 2008 Interesting, must be just picky timing issues in the code then. Quote Link to comment Share on other sites More sharing options...
supercat Posted December 17, 2008 Share Posted December 17, 2008 The original ROF proto has a 2K RAM chip. But it's wired IIRC to appear in 4K of address space; each 512 bytes of address space has two mirrors of one 256-byte page. Quote Link to comment Share on other sites More sharing options...
kenfused Posted December 17, 2008 Share Posted December 17, 2008 (edited) But it's wired IIRC to appear in 4K of address space; each 512 bytes of address space has two mirrors of one 256-byte page. I imagined they did that to get an 8-bit Graphics 7 like (160x96 ish) mode with double high pixels to be faster to update the screen? Do they just connect A9 to A8 on the RAM chip, etc? Edited December 17, 2008 by kenfused Quote Link to comment Share on other sites More sharing options...
supercat Posted December 17, 2008 Share Posted December 17, 2008 I imagined they did that to get an 8-bit Graphics 7 like (160x96 ish) mode with double high pixels to be faster to update the screen? That would be my interpretation. Quote Link to comment Share on other sites More sharing options...
Crazyace Posted December 20, 2008 Share Posted December 20, 2008 If you just disconnected a8 of a normal ram I guess it may float to a single value - ( or maybe you ground it or pass the original a8 through a gate ) You could make it a switch so the ram can be used as 'Rescue' or normal mode Quote Link to comment Share on other sites More sharing options...
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