Acorn 6502 Second Processor

This is my Acorn 6502 Second Processor, it comes with 64KB of RAM of which around 44KB is available to programs. Depending on the version of BASIC installed in the BBC Micro, either the highest available 16KB is used to store the HIBASIC ROM in the Second Processors memory, or where the standard version of BASIC is loaded into the memory map the RAM available to programs is split and the ROM occupies the memory map from &8000 - &C000.

When HIBASIC is used, it isn't loaded into the highest 16KB of RAM, as the top 2KB is used for the Second