10 May
2007
10 May
'07
12:41 a.m.
Allison wrote:
The one piece I haven't figured out from this discussion yet, is...
Is the Pro/350 identical to an RQDX1, RQDX2, or RQDX3 ?
From the discussion, I'd presume 1 or 2.
Another Q, does the entire PDP-11 based PRO series all use the same
MFM drive controller and have the same drive size limitations, etc ?
I have a PRO380 that came w/o a hard drive... I have some MFM hard
drives... so would be good to know 'all about it' before I being playing
(when I can get to it :-( ).
On a side note, anyone got POS or other OS diskette images for the PRO ?
Thanks,
-- Curt
On 5/8/07, Allison <ajp166 at bellatlantic.net> wrote:
They looks the same but the handle has a different rev. The real differences
are bug fixes. Essentially the RQDX2 is a bugfixed RQDX1 with later firmware
that is aware of a larger (at that time) assortment of drives. In the real
world of MSPC controllers RQDX3 is most desireable and RQDX1 the least.
FYI: some flavors of RQDX1/2 didn't pass interrupt grant and MUST be the last
card in the chain.
The RQDX1/2 are the same board and mostly
interchageable depending on
firmware rev. It's a Quad width board.
What are the essential differences between an RQDX1 and RQDX2?
AFAICR, the RQDX1 doesn't pass grant below it so it *must* be the last
board on the bus, but the RQDX2 doesn't have that limitation; and, the
RQDX2, I think, knows about one or two more drives than the RQDX1. a)
is that correct? and b) is that all?
-ethan