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a5000_adapter_pcb
cpld
firmware
os_switcher_bootloader
pcb
riscpc_adapter_pcb
README.md

README.md

Stardot thread

Orientation is A3000-relative:

  • "Left" is the direction of pin 1 of the four ROM sockets. "Top" is the top edge of ROM 1. "Bottom" is the bottom edge of ROM 4.

A3000:

  • Lots of room to the left and right of bottom ROMs.

A3xx machines:

  • Rotated 90 degrees counter clockwise relative to A3000 orientation.
  • Plenty of room to the "left". No room to the "right" (podule backplane). PCB edge about 0.1" from "top".

Board placement:

  • CPLD at the top left (around ROM 1 pin 1).
  • USB socket at bottom left (around ROM 4 pin 1).

Pictures

PCB front

PCB back