C64-Kernal-Adapter-Switch-short-board-

This is a Kernal Adapter/Switch for the Commodore C64, ASSY250469 (short board). Since the BASIC is stored in the same ROM, some circuit is required to allow a stable access to BASIC, while the Kernal can be selected. The kernal selection can be configured with jumpers, a switch or even with a micro controller. +5V are provided on the pin header for this purpose.

This development was inspired by Adrian Black's youtube video How-To: C64 Arduino based Restore Key/Four Kernal Switcher/Hard Reset

Rev. 2

Rev. 2 provides an optional pin heaer with the address bit A5 and A8 for stereo SID applications

BOM Calculation

The component prices of BOM v0.0 were summed up. The total is 4.88€, which does not include any shipping fees.