On 2019-07-01 06:07, Eric Smith wrote:
On Sun, Jun 30, 2019, 19:37 Clem cole <cl...@ccc.com
<mailto:cl...@ccc.com>> wrote:
You can use RH70 (massbus controllers) and just use the larger
(originally expensive) 19” disks from the early days.
14 inch, but who's counting. :-)
Also, even the largest massbus disks weren't that large. And the RP07,
being the largest, was not really supported that well on the PDP-11. In
reality you could only run it on an 11/70, and at roughly half a gig,
it's rather small today.
MSCP disks have the advantage of being able to be arbitrary size, and
can be very big, and are supported by all models.
Also, speaking of models, I would usually recommend something with
22-bit addressing and split I/D space. So no 11/40. 11/70 would be my
choice for a Unibus machine, and 11/93 for a Qbus.
The slight advantage of an 11/93 is the TOY clock. Otherwise it's the
same as the 11/73 and 11/83.
11/94 is also an option if you want to pretend Unibus, and it can take a
little bit more ram than an 11/70.
So, large machine, and then put in 4M of memory (more or less, depending
on model), a couple of really big MSCP disks, and off you go.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: b...@softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
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