31 Dec
2012
31 Dec
'12
12:09 p.m.
What PDP11 OS would fit on a 20MB ST-225? I had hoped RSX-11M+ 4.2 would
fit, but it doesn't. The OS would need to run on an 11/73.
Regards
Rob
31 Dec
31 Dec
1:25 p.m.
Straight 11M (non-plus) does. (fits in 10 actually) Early RSTS/E, like v8, should, but
not 10 and likely not 9. RT11 does.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
On Dec 31, 2012, at 3:09 PM, "Rob Jarratt" <robert.jarratt at
ntlworld.com> wrote:
What PDP11 OS would fit on a 20MB ST-225? I had hoped
RSX-11M+ 4.2 would
fit, but it doesn't. The OS would need to run on an 11/73.
Regards
Rob
1:39 p.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Dave McGuire
Sent: 31 December 2012 21:26
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: What PDP11 OS in 20MB Disk Space
Straight 11M (non-plus) does. (fits in 10 actually) Early RSTS/E, like
v8,
should, but not 10 and likely not 9. RT11 does.
BitSavers looks like it has 11M 4.0 in a 19MB virtual tape, here:
http://bitsavers.informatik.uni-stuttgart.de/bits/DEC/pdp11/magtapes/rsx11m/
Assuming that is the right one to go for?
I know next to nothing about RSX, what is the difference between plus and
non-plus?
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
On Dec 31, 2012, at 3:09 PM, "Rob Jarratt" <robert.jarratt at
ntlworld.com>
wrote:
What PDP11 OS would fit on a 20MB ST-225? I had
hoped RSX-11M+ 4.2
would
> fit, but it doesn't. The OS would need to run on an 11/73.
>
> Regards
>
> Rob
10:38 p.m.
On 12/31/2012 04:39 PM, Rob Jarratt wrote:
Oh jeeze, lots of stuff...I'm quite drunk at the moment, but I seem to
recall..named directories being a biggie. Johnny (if he's montoring)
can expound.
I ran 11M (non-plus) on an 11/34 for many years. Rock solid, fast,
very nice OS.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
Straight 11M
(non-plus) does. (fits in 10 actually) Early RSTS/E, like
v8,
should, but not 10 and likely not 9. RT11 does.
BitSavers looks like it has 11M 4.0 in a 19MB virtual tape, here:
http://bitsavers.informatik.uni-stuttgart.de/bits/DEC/pdp11/magtapes/rsx11m/
Assuming that is the right one to go for?
I know next to nothing about RSX, what is the difference between plus and
non-plus? 
1 Jan
1 Jan
10:24 a.m.
On Tue, Jan 01, 2013 at 01:38:58AM -0500, Dave McGuire wrote:
On 12/31/2012 04:39 PM, Rob Jarratt wrote:
CON (i.e. device configuration at runtime) was another important thing.
If I understand right, the main point of the rewrite was to support
the 11/74 mP machines (where the point is uptime so they wanted to be
able to remove switchable hardware for repair w/o shutdown/reboot), but
then they shipped the new SW even after they decided to sit on the HW.
(The mP features are covered in the doc set so evidently it was a
late decision.)
John Wilson
D Bit
I know next to nothing about RSX, what is the
difference between plus and
non-plus?
Oh jeeze, lots of stuff...I'm quite drunk at the moment, but I seem to
recall..named directories being a biggie. 
31 Dec
31 Dec
7:06 p.m.
On 12/31/2012 04:25 PM, Dave McGuire wrote:
Straight 11M (non-plus) does. (fits in 10
actually) Early RSTS/E, like v8, should, but not 10 and likely not 9. RT11 does.
-Dave
I have RSTS on RL02 so it must fit on 10mb!
RT11 fits on anything, the whole build kit is two RL02s (boot and kits)
I know of none that do not fit. RSTS and RSX are big and might have to
be trimmed
a little or some optional part left off. I do know we ran all of them
off three
RM03s (one per OS) on GRAF an 11/70.
Allison
1 Jan
1 Jan
12:33 a.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of allison
Sent: 01 January 2013 03:06
To: General Discussion: On-Topic Posts Only
Subject: Re: What PDP11 OS in 20MB Disk Space
On 12/31/2012 04:25 PM, Dave McGuire wrote:
> Straight 11M (non-plus) does. (fits in 10 actually) Early RSTS/E,
like
v8,
should, but not 10 and likely not 9. RT11 does.
I am not sure how you would do that. I am following these instructions:
http://9track.net/pdp11/rsx4_sysgen.
The trouble is that after restoring the RSX-11M+ 4.2 tape, when I reboot
-Dave
I have RSTS on RL02 so it must fit on 10mb!
RT11 fits on anything, the whole build kit is two RL02s (boot and kits)
I know of none that do not fit. RSTS and RSX are big and might have to be
trimmed
a little or some optional part left off. from the disk it gives repeated disk allocation errors,
presumably through
lack of space. Is there a step that needs to be added when first
restoring
the tape to the hard disk?
Regards
Rob
I do know we ran all of them
off three
RM03s (one per OS) on GRAF an 11/70.
Allison
31 Dec
31 Dec
7:08 p.m.
On 12/31/2012 03:09 PM, Rob Jarratt wrote:
What PDP11 OS would fit on a 20MB ST-225? I had hoped
RSX-11M+ 4.2 would
fit, but it doesn't. The OS would need to run on an 11/73.
Regards
Rob
NOTE: an 11/73 runs all the OSs. Others that run on 20mb or less is
Unix V6, V7, 2.11. I have V6 on a RL02 (10mb) with user space.
Generally PDP11 OSs tend to be compact.
Allison
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days inactive
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days old
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ajp166＠verizon.net -
mcguire＠neurotica.com -
robert.jarratt＠ntlworld.com -
wilson＠dbit.com