Jump to content


I/O Port Cartridges

1 reply to this topic

#1 Casey OFFLINE  


    Chopper Commander

  • 231 posts

Posted Tue Sep 12, 2017 6:00 PM

I was perusing the owner's manual for Miner 2049'er, and came up with a few questions.  The manual for the cartridge tells you to plug the cartridge in, then turn on the TI 99/4A and the game will show up as 2 on the system menu.  Did these types of games use the same I/O space in the memory map as the normal cartridge port?  Could you plug in this game and and normal cartridge at the same time and see both cartridges on the menu?

#2 Ksarul OFFLINE  


    River Patroller

  • 4,571 posts

Posted Tue Sep 12, 2017 6:49 PM

Side port cartridges were in the same space as the memory expansion and also usually had some part of the cartridge in the DSR space. It needed the DSR hooks to get the menu data loaded into the right place (and coincidentally, avoided the V2.2 lockout on the cartridge port).

0 user(s) are browsing this forum

0 members, 0 guests, 0 anonymous users