[ih] Early internetworking

[Vint Cerf]

great reference and story  about Boggs!!!

thanks
v


On Thu, Feb 5, 2026 at 7:48 AM Lawrence Stewart via Internet-history <
internet-history at elists.isoc.org> wrote:

> In 1978 the Packet Radios for PRNet were built by Collins and indeed had
> BBN-1822 host interfaces.
>
> I was an intern at PARC at the time and designed the Alto-1822(1) to work
> with it.  The low level link protocol was indeed not like the IMPs. The one
> we used was called CAP for Channel Access Protocol.
>
> The MTU was quite small and we had to fragment PUPs for transit.  Hal
> Murray had written a Pup Stack/gateway in Mesa and we used that for our
> work.
>
> There are great PRNet stories though. According to lore, the Collins
> manager wanted absolute control over the radio software and insisted it be
> kept in a box of punched cards in his office.
>
> IEN 78 has more information, and the software is still out there in the
> computer museum’s collection.
>
> (1) Dave Boggs looked at my draft design and said “You obviously do not
> know what you are doing.” and then taught me the right way to design state
> machines.
>
> -L
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