11 Jun
2009
11 Jun
'09
7:45 a.m.
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
Not
possible. The only MSCP controller DEC did for Unibus was to SDI
(tha UDA50). The only MSCP to MFM controller DEC did was for Q-bus (the
RQDX series).
What happens if you put a DW11B (Unius - Qbus interface) in the Unibus
machine and connect the Qbus side of that to an RQDXm? Obviously it can
only support 18 it DMA, but it does support that.
I know for a fact that you can use an RLV11 on a Unibus machine that way,
I did it on an 11/45 with no problems.
Yeah, that could possibly work. As long as you accept the 18-bit DMA
address limitation.
I think the UDA50 and the KDA50/RQDX all look similar enough at the port
level that it could work fine.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
Hmm, MSCP on
my PDP-11/24. 8-)
Yes, with a high-speed RD52 for authenticity ;-)