In the last 2 months I have re-done my X65 double-decker computer into a Single Board Computer (SBC).
The single-board version fixes some of the electrical problems I had on the first version and it has way better signal integrity thanks to the 4-layer PCB. Other than that, the feature-set is basically identical.
- added the mono speaker with volume control.
- added (Olimex) UEXT connector – 2×5 pins connected to the NORA FPGA.
- added internal bus extension connector 2×10 pins.
- added DIP switches and internal status LEDs.
The complete Kicad project is on the github as usual: X65-SBC.
I have also created this as a project on Hackaday: X65-SBC.
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