4 Feb
2019
4 Feb
'19
12:56 a.m.
On 2019-02-04 00:14, Brian Hechinger wrote:
What about the different CPUs?
You can essentially group them in to a few different groups.
But for anything able to run RSX-11M-PLUS, RSTS/E and BSD, we're
essentially talking about the 11/70 class, which includes the 11/44,
11/70 and all J11 based machines. They are pretty similar, but I guess
the J11 is the slightly simpler one of them, if you really want to get
down to it.
Oh, and any Qbus machine is easier than Unibus ones.
Johnny
On Sun, Feb 3, 2019, 17:11 Johnny Billquist <bqt at softjar.se
<mailto:bqt at softjar.se> wrote:
On 2019-02-03 22:42, Brian Hechinger wrote:
--
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
On Sun, Feb 3, 2019, 16:15 Johnny Billquist
<bqt at softjar.se
<mailto:bqt at softjar.se>
<mailto:bqt at softjar.se <mailto:bqt at
softjar.se>> wrote:
? ? ?On 2019-02-03 22:02, Brian Hechinger wrote:
? ? ? > What is the simplest PDP-11 CPU/peripheral design that is
capable
of
? ? ? > running RSX-11, RSTS/E or BSD?
? ? ?Define "simple" please. :-)
The easiest to implement with limited tools.
If the size of the device driver is anything to go on, then roughly
ranked from easiest:
RK11
TC11
RP11
RL11
Massbus in general I think can be done to work without too much
complexity. RK611 shouldn't be too bad, but do add a bit more stuff.
But I think pretty much anything except MSCP is roughly similar in
complexity for someone implementing it.
? ?Johnny
? ? ? > Also, what is the minimum disk space needed to install those
? ? ?operating
? ? ? > systems? I have a plan. Probably not a good one but I'll
likely
? ? ?learn a
? ? ? > lot in the the process so it won't be a waste of time.
? ? ?RSX-11M-PLUS can run from two RL02, if you just accept the pregen
? ? ?system. But that's the smallest. If you want to build stuff,
something
? ? ?like an RK07 is required, and that is 28
Megs. But I think it's
? ? ?recommended that you have two. But that probably is for more
reasons
? ? ?than just running the actual system (it is
hard to do an
update if you
? ? ?are running on an RK07, and the update media
is an RK07).
? ? ?RSX-11M definitely gets away with less. RSTS/E would be
similar, I
? ? ?think, while BSD probably wants a little
more.
Ok, that's what I needed to know (more ballpark than anything
else is
fine)
Thanks!!
-brian
--
Johnny Billquist? ? ? ? ? ? ? ? ? || "I'm on a bus
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?||? on a psychedelic trip
email: bqt at softjar.se <mailto:bqt at softjar.se>? ? ? ? ? ? ?||
Reading murder books
pdp is alive!? ? ? ? ? ? ? ? ? ? ?||? tryin' to stay hip" - B. Idol