2 layers119.6 × 123.9 mm

Cpc6128 rom board
bmpc/amstrad_cpc6128_romboard
A ROM Board for the Amstrad CPC 6128 capable of loading two expansion ROMs simultaneously from an SD card.
44 parts6
Boards in 2 GitHub repositories, designed in KiCad, that use the SN74HC02N by Texas Instruments (-40℃~+85℃ 1.5V~4.2V 1.9V、3.98V、5.48V 100mV、400mV、400mV 15ns@6V,50pF 2 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 74HC Series NOR Gate DIP-14 Logic Gates ROHS). See how each wires it, with its parts, size, README and files; the SN74HC02N’s symbol, footprint and pinout are on its own page.

bmpc/amstrad_cpc6128_romboard
A ROM Board for the Amstrad CPC 6128 capable of loading two expansion ROMs simultaneously from an SD card.

paulbruneau/ssio-check
A bench tester for the Bally/Midway MCR Sound I/O family: the 90908 Sound I/O and the 90913 / 91483 / 91657 Super Sound I/O (Z80, two AY-3-8910s, and all of the game's input ports).