Lars Brinkhoff wrote:
> I have started writing an IMP interface as used with the MIT-AI/ML/MC
> KA10 and KL10 machines.
Making good progress on this. My primary goal is to use it for TCP/IP.
(The Arpanet, and the IMPs, switched to IP in 1983 and kept running
until 1990.)
But if someone wants to
Timothe Litt wrote:
> KL10 - AN10 - I/O bus interface to the IMP for 1080/1090/1091
Drawings for the AN10:
http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/pdp10/periph/MP00326_AN10_Arpanet_Interface_Engineering_Drawings_Jul77.pdf
> KS10 - AN22 (Yet another KMC11 + line card device)? This may
DEC produced IMP interfaces for the -10/20. They typically were bundled
into the T systems (e.g. 1090T), but could be bought separately. DEC
provided drivers & utilities for TOPS-20, but not TOPS-10.
KL10 - AN10 - I/O bus interface to the IMP for 1080/1090/1091
AN20 - Same, for DECSY
I'm focusing on interfacing with a PDP-10. But it could be interesting
to make a list of possible future additions. Which interfaces were
there?
- KA IMP: PDP-10 I/O bus.
- DM IMP: PDP-10 I/O bus. Just one, made by Bob Metcalfe.
- ACC LH/DH: Unibus.
- DEC/CSS IMP11-A: Unibus.
- CIMPSPIF: GE-645
Henry Bent wrote:
> There are drivers in 4.2BSD for IMP interfaces, the ACC LH/DH and the
> DEC IMP11-A. These are set up to use TCP/IP but it is unclear to me
> how much work the board does vs. what is expected of the IMP itself.
> As far as I am aware there is not technical documentation for eith
IIRC the imp11-a is built from a dr11-b with some custom interface logic to
talk to the 1822 (thinking about it it was maybe 2 back to back I’ve
forgotten) but from a SW stand point the registers are what is exposed by the
dr11. Although the CSS folks may moved the default addresses.At one
On 7 March 2018 at 14:30, Phil Budne wrote:
> > >Can the IMP software and the H316 simulator talk TCP/IP to an ehernet
> card?
>
> If we had TCP-era IMP code, one could, in theory, but as I recall the
> structure of the TCP ARPAnet (net 10) address was that one octet was
> the IMP number, and ano
On Wed, Mar 7, 2018 at 2:30 PM, Phil Budne wrote:
> > >Can the IMP software and the H316 simulator talk TCP/IP to an ehernet
> card?
>
> If we had TCP-era IMP code, one could, in theory, but as I recall the
> structure of the TCP ARPAnet (net 10) address was that one octet was
> the IMP number, a
> >Can the IMP software and the H316 simulator talk TCP/IP to an ehernet card?
If we had TCP-era IMP code, one could, in theory, but as I recall the
structure of the TCP ARPAnet (net 10) address was that one octet was
the IMP number, and another the port on the IMP, which was severly
limited (four
>Can the IMP software and the H316 simulator talk TCP/IP to an ehernet card?
Well, the IMP software talks to one or more IMPs via a modem and an AT&T
leased line. That's what IMPs do. Simh emulates the modem using a TCP
connection.
As others have pointed out, the original ARPANet didn't use
Robert Armstrong wrote:
> that way you should be able to use the original IMP software which
> already runs on the H316 emulation.
My primary objective is connecting KA10 ITS to the internet. Can the
IMP software and the H316 simulator talk TCP/IP to an ehernet card?
Phil Budne wrote:
> There ar
There are many reasons for supporting "1822" (the host-to-imp
protocol) in SimH in a generic way:
To speak to a simulated pre-TCP-era (aka NCP) IMP
(or a simulated TCP-era IMP if that code becomes available)
To speak to the TCP Internet on a simulated system that never had an
Ethernet interfac
>Presumably the Honeywell 516?
In the case of simh it’s actually the H316 simulator. This already contains
a fully functional IMP simulator that was written a few years ago. I hope
people know that.
Hopefully you will make your KA host interface card talk to the 1822 card
emulatio
>>> Are there any other SIMH machines that could benefit from having an
>>> IMP attached?
>
> Bob Eager wrote:
>> Presumably the Honeywell 516?
The 516 ran the BBN IMP software. I'm talking about making an IMP
avaiable to a host machine such as a PDP-10. To connect a host to the
network (ARPAnet
2018-03-07 11:24 GMT+01:00 Bob Eager :
> On Wed, 07 Mar 2018 10:01:08 +
> Lars Brinkhoff wrote:
>
> > Hello,
> >
> > I have started writing an IMP interface as used with the MIT-AI/ML/MC
> > KA10 and KL10 machines. (MIT-DMS used another interface created by
> > Bob Metcalfe.) I'm looking to
On Wed, 07 Mar 2018 10:01:08 +
Lars Brinkhoff wrote:
> Hello,
>
> I have started writing an IMP interface as used with the MIT-AI/ML/MC
> KA10 and KL10 machines. (MIT-DMS used another interface created by
> Bob Metcalfe.) I'm looking to add this to Rich Cornwell's KA10
> simulator which is
Hello,
I have started writing an IMP interface as used with the MIT-AI/ML/MC
KA10 and KL10 machines. (MIT-DMS used another interface created by Bob
Metcalfe.) I'm looking to add this to Rich Cornwell's KA10 simulator
which isn't yet ready to merge into mainline SIMH.
I'm hoping that the interfa
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