Original version: 28/01/2013
Update: 18/11/2022
This board is made to store 63 rom files into a 2 UVPROM (2 x 1M x 8 bits).
To use it, you need a specific 'bootloader' stored at the bank 0 location (first 32k bytes).
All other rom images must be stored into the other 32K bytes banks.
Running the bootloader lets you choose a rom image (between 63 images), switches to the corresponding memory bank and launches the image.
Files
Colecovision-TwinCms.sch : Schematics (Eagle 6.3.0)
Colecovision-TwinCms.brd : PCB (Eagle 6.3.0)
Gerber/ Gerber files
Usage
Concatenate the bootloader (not delivered yet) with 31 image files (32Ko max) to get a 1M byte file then burn it to the IC3 chip.
Concatenate 32 other image files (32Ko max) to get another 1M byte file then burn it to the IC5 chip.
For the bootloader, follow the link here.
Many thanks to my friend ZX for his help and his very great bootloader !
The attached package contains all you need to build your own cartdrige.
Enjoy !
Buzz
