Various early-year updates. MSX cartridge & Drumulator.

Currently, I am working on two major projects. On one hand, there's the development of an MSX cartridge based on an FPGA. After several attempts to create this type of cartridge using different processors, I decided to switch to an FPGA. The task is quite complex as it involves being able to download an executable cartridge file from a PC, program the FLASH memory, and then make it accessible to…