front panels

From: Allison J Parent <allisonp_at_world.std.com>
Date: Tue Feb 24 08:47:24 1998

<> The Intellec MCS8i and the PDP11 (obviously, since all I/O is memory
<> mapped) do allow you to access I/O devices directly from the panel.
<
<...and the front panel on the Altair 8800b.

The 8008 does not have memory mapped IO, there are distinct IO
instructions. It's not to say MM/io is not done. The PDP-11 memory
and devices are the same things and there are no specialized IO
instructions.

The altair...(8800 and 8800a) from the front pannel there is no way to
interrogate an port mapped IO device or write to it. You must do it with
a little code.


Allison
Received on Tue Feb 24 1998 - 08:47:24 GMT