== Components ==
sound chip is [http://www.fpgaarcade.com/library.htm ym2149 fpgaarcade] one, patched, and repatched in order to get stereo sound.
PPI chip is [http://www.cpcwiki.eu/index.php/VHDL_implementation_of_the_8255_PIO 8255 CPCWiki] one, patched.
PWM chip is [http://www.fpga4fun.com/PWM_DAC.html PWM_DAC fpga4fun] one, patched in order to get high sound quality (my PWM has two clocks in entry)
PS/2 keyboard chip was patched in order to play "Macadam" (pinball) friendly : I removed key time-out, and modified right shift-key mapping so it is a different key than the left shift-key. So left shift-key is the true shift-key in FPGAmstrad. Page-up key is a reset key (it's my panic button), Insert key is the "copy key". F1 F2 F3 is mapped at top of keyboard only, because of some bad management of "numeric lock key" in some low-cost keyboard.
== And thanks ==