NPR and the RX11 (was Re: help needed: problem with UNIBUS ac cess on my PDP-11/70)

From: Gooijen H <GOOI_at_oce.nl>
Date: Tue Jul 16 01:38:00 2002

  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_at_TheWorld.com]
> Sent: dinsdag 16 juli 2002 6:19
> To: cctalk_at_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
Received on Tue Jul 16 2002 - 01:38:00 BST