4 layers113 × 69 mm
VideoMacPac
apmcpherson/VideoMacPacHack
Clone of the Video Mac Pac PDS video card for the Macintosh Portable
30 parts27
Boards using the 74F521PC
8 boardsBoards in 4 GitHub repositories, designed in KiCad, that use the 74F521PC by onsemi (0℃~+70℃ 10ns@5V,50pF 1mA 20mA 4.5V~5.5V 8 A=B Active Low Multi-device cascading PDIP-20 Digital Comparators ROHS). See how each wires it, with its parts, size, README and files; the 74F521PC’s symbol, footprint and pinout are on its own page.
- 2 layers150 × 150 mm
- 4 layers254 × 134.6 mm
Z280-S100
cm68/Z280-S100
16-bit Zilog Z280 CPU card for the IEEE-696 S-100 backplane; glue logic in two ATF1508AS CPLDs
61 parts1CERN-OHL-P-2.0 - 2 layers101.6 × 101.6 mm
- 2 layers101.6 × 101.6 mm
- 2 layers101.6 × 101.6 mm
- 2 layers101.6 × 101.6 mm
- 4 layers101.6 × 101.6 mm
