The console on all PDP-11s is at the same place,
777560-777566 (add
"17" in front for a 22-bit system, though). The first word is the
receive control and status register (CSR), the next is the receive
buffer register, then the transmit CSR, and lastly the transmit buffer
register. So if you have a terminal connected, and with baud rate,
parity, and word size to match the M7800 settings, simply DEPositing a
value into 777566 should cause the corresponding ASCII character to
appear on your terminal. If you type a character on the terminal, it
should appear in the lowest 8 bits of 777562.
Should this work in the simh emulator? I can't seem to get it
to happen. But maybe I'm just having a stoopid day.
De