Irem arcade boards M72/82/84/85/97 all based on a NEC V30 main CPU (a 16-bit processor based on the NEC V20 from 1984, which was partially reverse engineered from Intel's 8086), a Zilog Z80 for audio, and a YM2151 (OPM) FM sound chip, the same chip used in the DX21/DX27/DX100 keyboards.
ocdgamer.rb:336:output_game_list(
9 games, mode:largebox, tag id:72, sortby:year,
url_arg_prefix:, output_list_selection:true)
output_large_game_box(521)
output_large_game_box(980)
output_large_game_box(670)
...
execution time:
output_game_list: 0.00s