16 Jul
2002
16 Jul
'02
1:38 a.m.
Hi Ethan.
Yes, the RX11 (M7846) is programmed I/O only.
I checked the RX board yesterday for my NPR problem in the 11/70.
Indeed, the pins CA1 and CB1 are *not* wired on the board ...
back to the 11/70 thread with this result.
- Henk.
-----Original Message-----
From: Megan [mailto:mbg@TheWorld.com]
Sent: dinsdag 16 juli 2002 6:19
To: cctalk(a)classiccmp.org
Subject: Re: NPR and the RX11 (was Re: help needed: problem
with UNIBUS
access on my PDP-11/70)
The RX11 isn't DMA... when you give a command, it reads to a
silo which
the driver has to dump, a character at a time, or writes the
silo which
has been written, a character at a time...
I just checked the RT-11 RX01 driver source to confirm it...
Megan Gentry
Former RT-11 Developer