31 Jan
2022
31 Jan
'22
9:22 p.m.
Then we are probably talking apples and pineapples.
The product that I'm talking about is exclusively for the 36 bit line,
requiring a DTE to get the data to the PDP-10. I think it also needed a
KMC to do some offloading, so the 11/34 could keep up, but I wouldn't
swear to it. There's code for a KMC, anyway.
The software appears to be a complete embedded design: there are no
users, no file system, minimum memory management and no task
preemption. Thus, I don't believe it has any code basis in either RSX
or RSTS. I wouldn't be surprised if part of it got lifted from RT-11,
but I don't have an informed opinion on that.
The DN60/DN65 spoke 2780, 3780 and HASP. The first two are remote job
entry (RJE) 'workstations' that had card readers and line printers (no
terminals). HASP is a variant that IBM did not develop, yet adopted. I
believe it was wizzy because it allowed multiple concurrent streams.
The job of IBMSPL was to fool the remote IBM host that a card deck was
being submitted by a timesharing user and to take the resulting print
output and to get it to wherever the right place was (printer, file, etc.)
I don't recall a 3271, I guess you mean those green screen terminals?
What a beast... I do recall using 3270, 3276 and the like when I was
hacking the bisync drivers on VM to talk to IBMSPL. There was a product
that you could run on Tops-20 to show up as a 3270 on an IBM box,
provided the target spoke TCP/IP. I can't remember the name, but it was
based on TELNET negotiating some additional options. It's a lot of
work; a 3270 is not like anything you ever heard of in ÅSCII land.
A number of us swore that IBMSPL was the only reasonable way to use an
IBM mainframe as the 3270 was a half-duplex terminal that was all to
ready to lock the keyboard if you even thought of typing ahead. The
more modern emulators don't lock like that, but you are still
effectively in a late 1960's half duplex paradigm. Still. Today. Really.
On 1/31/22 3:00 PM, Paul Koning wrote:
What I mentioned is one or several PDP-11 products,
available for RSTS and I believe RSX. There definitely is an "RJ2780 emulator"
-- the official name may not be quite that. And I think there was also a 3271 emulator,
though I'm not sure if that existed on RSTS.
I have no idea what these things do, since 2780 is something I've never used. Some
sort of remote job entry station? Anyway, it is the only RSTS software that uses a KG11.
DECnet doesn't because on RSTS DECnet only supported devices with hardware CRC: DMC
and friends and later Ethernet. I did an unsupported software DDCMP, but that does CRC in
software (8 bits at a time, the classic table driven fast software implementation). That
probably outruns a KG11 and in any case I never had access to that hardware.
paul
On Jan 31, 2022, at 2:52 PM, Thomas DeBellis
<tommytimesharing(a)gmail.com> wrote:
I wanted to make sure I wasn't getting lost; are you referring to the PDP-11 software
that forms part of the Galaxy IBM workstation product? It's called DN60/DN65 and also
does 3780 and HASP. Is this what you're referring to?
On 1/31/22 2:48 PM, Peter Allan wrote:
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To unsubscribe send an email to hecnet-leave(a)lists.dfupdate.se Paul Koning wrote ...
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To unsubscribe send an email to hecnet-leave(a)lists.dfupdate.se Correct, I was not aware it's possible to use
it. The only software I have seen that uses the KG11 is 2780 emulation.
I am very
interested in getting 2780 emulation for a PDP-11.
Paul, or anyone else, do you know where I can get it?
Cheers
Peter Allan
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