[Simh] KS10 IMP documentation

Mon Feb 29 16:20:44 EST 2016

Hum... not sure about this, but someone talked here some years ago about a
modification of  the SIMH Honeywell simulator to convert it in one IMP. I
assume that he had some kind of BBN IMP code.

I'm not sure if this project would be limited to tray to simulate the
original ARPANET token ring limited to the IMPs or there was some other
goals to reach. An example: modify another simulator adding to it a
simulation of one device like this one (AN22) making it to talk with the
IMP.

As I said this was a post from years ago. Perhaps was Bob Armstrong who
talked about it but I'm not sure at all.

Kind Regards.

Gracias | Regards - Saludos | Greetings | Freundliche Grüße | Salutations

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*Sergio Pedraja*
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2016-02-29 21:48 GMT+01:00 Clem Cole <clemc at ccc.com>:

> Tim I'm going to guess that the AN22 implements the PDP-10 side of the BBN
> 1822 IMP interface. Is that a correct belief?
>
> Bit Savers has the BBN 1822 document from 1976 (the original I think was
> '72 - I had a xerox of that one).  I think I saw it about a week ago at
> home, so I'm nearly 100% sure I have very clean copy of the actual
> published in it's Yellow Cover from BBN, the later edition - which would
> have been the one when the IP transition was taking place or at least
> planned (i.e. post Arpanet - when IP was being created).  If so, I'll look
> into getting it scanned and send an update to Al.   I'm pretty sure there
> was changes when BBN implemented their own mini for the IMP (the C30 -
> which later got re-microcoded to be  general purpose computer - the C70 "C
> Machine").
>
>
>
> I do not remember how CMU interfaced the 10's and C.mmp to their
> (Honeywell) IMP.  I suspect it was either something like the AN22 or be a
> Jim "Tetter Toy" that he cooked up (I never knew).   However, IIRC @ UCB
> Ingres 11/70s a DR-11B with a little logic  (??Bob Kriddle hack maybe?? -
> at one time I had my hand in it).  That was the UCB Arpanet interface for
> many, many years --- until CSRG finally got a C30 IMP in Evans in the early
> 1980s.   Ing70 had a "very long host" interface from a Honeywell IMP that
> was "up the hill" at LBL.    Again, IIRC the C30 could do Ethernet to the
> Vaxen.   Or maybe it was connected to the Ethernet via a C70 which was
> connected the C30 (I've forgotten). But until the C30 showed up, the UCB
> Arpanet/Internet connection was fairly shallow; unlike CMU, MIT or Stanford.
>
> Clem
>
> On Mon, Feb 29, 2016 at 12:33 PM, Timothe Litt <litt at ieee.org> wrote:
>
>> On 29-Feb-16 12:34, b4 at gewt.net wrote:
>>
>> Hello,
>>
>> Can anyone point me at IMP documentation for the KS10? I'm only seeing
>> AN10 maintenance printsets up on Bitsavers...I'd love documentation that
>> isn't KLH10's KS10-ITS implementation!
>>
>> Alternatively, were any of the experimental Ethernet interfaces ever
>> supported in TOPS-10/20 on the KS10? (I don't have access to my SRI-NIC
>> packs due to the VM being down at present)
>>
>> Alternatively too...the userland ANF-10 bridge could prove useful for
>> this...
>>
>> Not clear what you want to do.
>>
>> The KS does have an ARPA interface, the AN22.  I have not tracked down a
>> spec for it.  It is KMC-11 based, not simulated by SimH at present.  The
>> TOPS-20 monitor sources for 4.1 are a resource.  One day I'll get access to
>> my stuff at CHM and will look for a spec.  It's on my list to see if it's
>> worth emulating.
>>
>> The DEUNA is simulated in SimH.  Neither the released TOPS-10 nor TOPS-20
>> support it.  There is some TCP code floating around that does.
>>
>> If you're trying to move files in and out:
>>   DECnet does work (phase II on TOPS-20, Phase III or IV on TOPS-20), and
>> will talk to VAX/RSX.  You can move files by stopping on or PMR thru) one
>> of them.
>>
>>   ANF-10 on the KS does work, KS-KS.  It should be possible to build the
>> -11 nodes on the KS & boot them on a SimH -11.  I've been meaning to get
>> around to that, but haven't.  With ANF, besides the peripherals and
>> terminals, you get DCP.
>>
>>    Networking on the KS is supported on both OSs by the KDP emulator.
>> The DMR should work, though I think there's a monitor bug in 7.04 where my
>> colleagues changed AC definitions and didn't update the DMR driver.  Also
>> on my list.
>>
>>     You can also move files in and out with Kermit (serial lines), cards,
>> magtape, printer.
>>
>> I don't know what you mean by 'anf-10 userland bridge'.  Of course, FAL
>> on the -10 listens to both DECnet and ANF.
>>
>>
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>
>
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