Parts-bin Weekend Project



PLASMA just got Uthernet IP support. Guess what’s next?

Unfortunately, the hardware isn’t without issue. The read operation with auto-increment address appears to drop accesses. The fix is to set the address for every read. This really slows down retrieval of packet data, but it is functional. Writes work as expected. It may be that the implementation is too simplistic: The WIZnet module is wired up directly to the Apple II bus, with the exception the /Read line is the inverted R/W line. There is a 3.3V regulator for the WIZnet module. Nothing more. I haven’t scoped out the signals to see where the read timing might go wrong.