This is a fork, rework and combination of two repositories from RetroNynjah.
https://github.com/RetroNynjah/Switchless-Multi-ROM-for-2364
https://github.com/RetroNynjah/Switchless-Multi-ROM-for-27128-27256
I would like to thank RetroNynjah for the brilliant idea and excellent work.
After a long search on the internet, there is finally the perfect ROM switcher.
A switchless multi-ROM for 2364 ROM (24-pin) and 27128/27256 ROM (28-pin) type applications.
The switch is controlled by an MCU that is picking up predefined magic words on the data bus.
Example use cases:
- Menu driven Kernal switch for Commodore VIC-20
- Menu driven Kernal switch for Commodore C64 (longboards)
- Menu driven Kernal switch for Commodore C64C (shortboard)
- Menu driven Kernal switch for Commodore C128
- You tell me
Check the General-Info.pdf for a general description and BOM.
Check the Application-Info.pdf in the applications folder for examples on how to use it for the use cases above.
Check the Hardware-Info.pdf and SMD-Hardware-Info.pdf in the hardware folder for a general technical description and build instructions.
A short video that shows how it works can be seen here. https://youtu.be/isT9-QBMzEc?si=csgdmX4p8TZYezGX
