Procyon now emulates SCC, SSG, PPI MSX audio hardware. Also it includes the 16 bit audio DMA, which is used at the start-up for the SDRAM and AC97 CODEC test purposes.

And here is the VIDEO of the audio demo.

Procyon expands MSX memory to 4096K.  The 64 Mbytes of onboard memory are shared between the emulated main RAM, VDP video RAM,  frame buffer RAM, SCC (ESE) RAM, cartridge ROM emulation (DOS/DOS2), etc.

MSX1 compatible sprite support is added and tested.

Procyon card was tested as the memory expansion unit for Yamaha CX11 computer. The integrity test is completed after the hours of error free operation.

The MSX slot interface was debugged and verified on the Yamaha CX11, CX5M2, Toshiba FS-TM1 and Panasonic FS-A1ST computers.

Next step – integration of the cut down 9938 VDP model and the memory subsystem into the top level FPGA entity.

One of Procyon boards was assembled.

Power, clock distribution, FPGA configuration and HDMI connectivity subsystems are functional. The burn-in test is yet to be done.