Hi, does anyone happen to know what response a Macintosh Plus keyboard (M0110A) sends in response to a "model number" command? According to Inside Mac, it should be something like:
Model Number $16
Bit 0: 1
Bits 1-3: keyboard model number, 1-8
Bits 4-6: next device number, 1-8
Bit 7: 1 if another device connected
I'm working again on the Mac-in-an-FPGA core for the MiST board, and trying to get the keyboard behavior right.
Edit: my current method of testing is to try different values, then open the Keyboard DA and see what image of a keyboard is displayed. So far no matter what values I've tried, it always shows an image of the old M0110 keyboard without the built-in keypad that's present on the Mac Plus keyboard.
I think Arbee is right. No matter what values I tried, the picture in the Keycaps never changed. I ended up going with an ID value of 3, which I think is also what bbraun uses for his PS2/USB keyboard adapter.