Ym2149 chip created by MikeJ in VHDL, compatible with Xilinx and Altera.
Not published, original version (coming from FPGAmstrad NEXYS4 v0 backup), just a very little patched to run in Amstrad (see "freemac" occurrence in code)
MikeJ is also author of :
- FPGAArcade platform (Xilinx final platform running AGA Amiga)
- T80 chip (VHDL) used also in FPGAmstrad project