coderbr

Thanks for all the explanations. They are being very useful. Sorry for the post here. But I had clicked on "2600" and ended up on the list: *2018 Atari Awards! *Atari 2600 Programming *2600 High Score Club *Harmony Cartridge *2600 Game Descriptions *AtariBoxed.com Rarity Database so I thought this was the best place ... now I found the hardware section. In the future I will post these questions in the hardware section. Thank you. Just to complement, I also found this on the internet ... used a transistor to do the inversion you said: https://www.pakequis.com.br/2008/09/multicart-para-atari-2600.html

I would like to know if there is any example of atari card that does not use special chips. That only uses one eprom preferably 27c512. Where I can record the rom to use and do my tests. Thanks if anyone has an example of gerber or photo.

Thanks for all the help. I will try to copy the card this weekend and put the scheme here.

Thank you for the tips. They work. However some graphic artifacts appeared on the screen ... and one of the games starts and is rotating the image. The name of the games (1: TIME-PILOT 2: not identified) I separated the rom and two from 8kb. but they work the same way ... (do I have a bad dump?) These additional chips (2x 74LS10) Do something special or simply to select the address legs to indicate which part of the eprom to use? This game was bought in Brazil. (attached dump). Thank you. ROMs atari.rar

Yes, thanks for the prompt reply. I'm at work now. Once I get home I'll gather the information from the additional chips, and try to post the rom here. I will try the commands you taught stella. Thank you.

Hi everyone. Sorry if this is not the correct place to post this message ... I'm new here. I used my eprom programmer (top300). And I copied the eprom from a cartridge. I tried to make it work on the stella emulator. but I did not succeed. Informations: 2 game cartridge Rentacon Cartridge Brand had inscribed on plate 4.8. I renamed bin rom to a26. the eprom was 27c128. The cartridge had two extra chips (I have to check the part code) The cartridge had a game change switch. Does anyone know why it doesn't work? thank you.