The board
Today, the board is routed, and I am waiting for the PCB to be delivered. The 160x100mm is a little dense and I couldn’t realize this PCB myself (too many vias).
However, the board lives on a
breadboard, which has allowed debugging the hardware
issues.
Updated June 25th 09 : The
board is now completed on a PCB. The PCB was made by
Olimex. To keep a size of 160x100mm, the
debug LEDs have been removed, but a connector for
extension has been added. Assembling the board went
smoothly, except for the 74LS73 (or HCT version), where
Protel 99 had a bug in its library and swapped Vcc and
ground. This resulted in a dead part (I had current
limiting, but that didn’t suffice !) and a desoldering
session to replace the bad part with a socket.
