It's a nice project, ramming together all the 80s machines.
68008 from the Sinclair QL.
V9990 is an enhanced version of the MSX2+ graphics chip (the chip was produced in the early 90s though).
SIDs from the C64.
I'd say the next step would be to use a full 68000, that 8-bit data bus is going to be holding the CPU back.
