M8207 anyone?

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Wed Aug 9 20:27:37 2000

>Allison's right, an M8027, LPV11 (Q-bus version of the LP11). I'm not
>interested in driving a printer with it, I want to talk to a Zip Drive.
As
>long as I can create a "Centronics" compatible interface (even with all
8
>data bits being output only) I have a chance of getting it to talk to
the
>zip drive. That would give me 100 MB of removable storage, on a PDP-11
that
>would be like heaven.
>
>--Chuck


Read up on parallel ports for PC first, the M8027 WILL NOT be sufficient.
Most
parallel ports ahve enough bidirectional lines and the 8bit data is
bidirectional
(only the old XT ports aren't).

Look into a m7941 (DRV11) parallel line unit sa that give you lots of
bits for
parallel IO. Another would be the M7950 DRV-11B general purpose DMA
interface (also a parallel IO). The latest one was the DRV-11J (M8049)
and that has enough lines to interface anything (32 in and 32 out).

The later boards could possibly even be enough to fake the IDE interface
directly. Even an old clunky 120mb WD2120 would seem large!

Allison
Received on Wed Aug 09 2000 - 20:27:37 BST