MSX2 Memory Mapper - 2MB

I made a slightly smaller PCB.

ver B was tested with:

Panasonic FS-A1
Sony HB-F1XD

Original work by Andrey Koryakin https://hansotten.file-hunter.com/do-it-yourself/memory-mappers-slots/2mb-4mb-internal-slot-expander/

Mapper tests on YouTube