Cartridges & MPI’s

The CoCoDAC is an Orchestra 90cc clone, that adds 8-bit stereo audio DACs to your Color Computer or Dragon. Fully compatible with the Orchestra 90cc, it includes two 16K banks containing ROMs for both machines. It uses a standard 27256 type ROM, so you could easily replace it with your own code if desired. The two banks are selectable via a switch next to the stereo output jack. Includes 3d printed case.

The CoCo PSG cartridge adds a YMF-2149 sound chip, 512K FLASH, 512K SRAM, and joystick ports to any Color Computer. Does not work with original software from back in the day as this is a new addition to available CoCo hardware. For the programmer and experimenter. Can be used with Drivewire (HDB-DOS included on the flash), but an MPI is recommended. See the project page for more information. Includes 3d printed case. New case design!

The MEGA mini is a four slot MPI for the Tandy Color Computer line that also adds two high-speed UARTs, OPL3 sound chip, and more to your CoCo. No commercial software from back in the day will automatically use the extended features, but if you're a programmer, programming information is available in the manual. See the project page for more information. Includes power supply. Choose your shipping option below.

Exactly like the MEGA mini MPI, but without the serial ports at a reduced cost. Still includes the OPL3 sound system and other features. See the MEGA mini project page for information on the features. Includes power supply. Choose your shipping option below.

Add dual USB to UART bridges to your MEGA-mini. For connecting your system to a modern computer via USB cable. Uses FTDI FT232BL bridge ICs, and supports baud rates up to 921600. Module plugs into MEGA-mini UART expansion port as pictured. See the project page for more details.

Super compact two slot MPI. This is a real MPI with bus arbitration through the MPI register (not a simple Y-cable). Use your CoCo SDC or other disk controller, and still have a slot for another cart while conserving your deskspace! Power supply is included. See the project page for more details and user manual.