doctorclu Posted February 25, 2015 Share Posted February 25, 2015 (edited) So aside from the Cuttle Cart 2, and the Harmony Cart for the 7800 in production (no comment there) what other options exist for loading a 7800 game? What advice can be given for making an eprom board for the 7800? For exampe, if I were to find a common 7800 game board what modifications would be needed to make a eprom cartridge? Has anyone tried making a static or flash ram cartridge that can load a game? Thanks in advance! Seeing what I can do to participate more in the 7800 High Score Club. Edited February 25, 2015 by doctorclu Quote Link to comment Share on other sites More sharing options...
doctorclu Posted February 25, 2015 Author Share Posted February 25, 2015 Ah here we go... http://www.digitpress.com/library/techdocs/7800_Eprom_cart.pdf Interesting in more advice on this topic. Quote Link to comment Share on other sites More sharing options...
tep392 Posted February 25, 2015 Share Posted February 25, 2015 Ah here we go... http://www.digitpress.com/library/techdocs/7800_Eprom_cart.pdf Interesting in more advice on this topic. This is what I did to make a copy of the track ball version of Centipede. I used an existing Centipede as the doner and printed my own label. You could build one with a socket and burn eproms for the various games. It's limited to 32k games of course. A ball blazer cart can be used to make games that are 32k or less plus you get POKEY support. It already has a spot for the inverter so no need to solder onto the back. This link has a lot of cart info including schematics. http://www.atarihq.com/danb/7800cart/a7800cart.shtml Quote Link to comment Share on other sites More sharing options...
Roy Posted February 25, 2015 Share Posted February 25, 2015 Cool, I have been looking for this information too. For the ball blazer, do you only need to add the inverter to that free spot, or do you still need to switch some address and data pins around? Quote Link to comment Share on other sites More sharing options...
doctorclu Posted February 25, 2015 Author Share Posted February 25, 2015 Good idea on the Pokey support and copies of Ballblazer are amazing cheap! Just bought one. Have to check and see if I have any 27256 or 27c256 for the 32K support. I have a whole bag of erpoms I pulled out of old PC for their Bios chips. Wouldn't hurt to look. As for the 74LS04 Hex inverter, is that available on any other Atari equipment? Quote Link to comment Share on other sites More sharing options...
doctorclu Posted February 25, 2015 Author Share Posted February 25, 2015 (edited) Nevermind on the Hex inverter question, I got like 10 pieces on ebay US Local including shipping for under $5. Since we are talking about 32K eprom cart, it might be good to know what games this will work with and those it will not. Is there a list of the size of game images anywhere that someone has compiled? Has anyone made an eprom cart for say 128K or more support? Could a cart that could support the larger size also support smaller sizes? Edited February 25, 2015 by doctorclu Quote Link to comment Share on other sites More sharing options...
tep392 Posted February 25, 2015 Share Posted February 25, 2015 This is the list of released <32K games from my emulator install. Both 16k and 32k games can be run on a 32k cart. There are also a bunch of homebrews and hacks that are 32k or less. Some that support POKEY are Froggie, Pac-man Collection, Pac-man 320 and Ms. Pac-man 320 When you start talking about larger bank switched carts then it gets more complicated. There are a handfull of different designs with varying amounts of ROM and in some cases RAM. The games need to be run on the carts they were designed for. Quote Link to comment Share on other sites More sharing options...
CPUWIZ Posted February 25, 2015 Share Posted February 25, 2015 I assume this is just a learning exercise? Or did you really miss 18+ months of development in the 7800 hardware sector? Quote Link to comment Share on other sites More sharing options...
tep392 Posted February 25, 2015 Share Posted February 25, 2015 Oh yes. You could also just buy new boards from CPUWIZ. 1 Quote Link to comment Share on other sites More sharing options...
doctorclu Posted February 25, 2015 Author Share Posted February 25, 2015 I assume this is just a learning exercise? Or did you really miss 18+ months of development in the 7800 hardware sector? What development are you talking about? This is why I am asking this question, to learn what is out there. All I have seen or followed is a Harmony cart for the 7800 that has been restarted, what is it now? Four times? Looking for other options. Oh yes. You could also just buy new boards from CPUWIZ. First off thanks for the information. Looks like a eprom cart will not accomplish much afterall. As for these new boards.. have a link? Quote Link to comment Share on other sites More sharing options...
CPUWIZ Posted February 25, 2015 Share Posted February 25, 2015 I am a bit busy at the moment, just search for any threads that I started in the 7800 forum, since around Nov. 2013. Quote Link to comment Share on other sites More sharing options...
tep392 Posted February 26, 2015 Share Posted February 26, 2015 Cool, I have been looking for this information too. For the ball blazer, do you only need to add the inverter to that free spot, or do you still need to switch some address and data pins around? just cut the w3 jumper. Quote Link to comment Share on other sites More sharing options...
Roy Posted February 26, 2015 Share Posted February 26, 2015 just cut the w3 jumper. Awesome, that was it! Thank you! Quote Link to comment Share on other sites More sharing options...
doctorclu Posted February 26, 2015 Author Share Posted February 26, 2015 (edited) I am a bit busy at the moment, just search for any threads that I started in the 7800 forum, since around Nov. 2013. That YOU started... ok, I'll check that out. just cut the w3 jumper. Thanks for the technical advice. Much appreciated. Edited February 26, 2015 by doctorclu Quote Link to comment Share on other sites More sharing options...
doctorclu Posted February 26, 2015 Author Share Posted February 26, 2015 Searches through 13 pages of CPUWiZ's message content, found this: For honorable mention I found: http://atariage.com/forums/topic/221891-devos-ram-cart-transfer-question/ http://atariage.com/forums/topic/231855-atari-26007800-dualshock-2-adapter-part-deux/ http://atariage.com/forums/topic/229738-7800-playstation-2-controller-adapter/ And here we go, Dev Kits: http://atariage.com/forums/topic/225127-atari-7800-mcp-development-kits/page-2 http://atariage.com/forums/topic/223989-ever-heard-anything-better-coming-out-of-the-7800/ http://atariage.com/forums/topic/226415-sold-out-4-x-atari-7800-mcp-pokey-nvram-devkits/ So there you go CPUWIZ, I believe that is what you were referring to. Looks like these can handle beyond 32K which is nice. Are they still $100 for the regular kits and $120 for the Pokey versions? Quote Link to comment Share on other sites More sharing options...
CPUWIZ Posted February 27, 2015 Share Posted February 27, 2015 The regular version is discontinued, only the POKEY version can be had for $110 shipped, made to order. The software is quite advanced at this point, compared to the original release. It now supports command line and delta programming (faster). RevEng converted a whole bunch of games to the bankswitch scheme the MCP uses and all non-bankswitched ROM's work as well. There are only a few games it won't load, like Activision and Absolute for instance. Again though, this is more of a devkit, rather than a replacement for something like the CC2. 1 Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.