[ih] NCP and TCP implementations
dave.walden.family at gmail.com
Mon Mar 16 15:27:18 PDT 2020
Alex, I think the MBB was developed, by Kraley and Rettberg, with BBN
internal R&D money.
Everyone, What I think I remember is that before the C/30 etc. was
developed, BBN Communication Corporation was BBN Computer Company and
its product was a computer, the C/70, which executed C as its basic
instruction set. Univx probably ran on that machine. The 70 might have
been chosen because BBN thought the C/70 was a competitor for the VAX
11/70. Ben Barker would know all about this. I don't remember if the
C/30 IMP development started before BBNCC became the computer
corporation instead of the computer company. The C/30, as perhaps has
already been noted, was a different set of micro code for the MBB which
looked like the Honeywell 316 IMP, so the earlier IMP code ran on the
new machine, called a C/30. I don't remember all the reasons for moving
from the 316 to the C/30 but I suppose one of them was that computers
were getting cheapter and the 316 was pretty expensive and a cheaper
computer was needed. Another reason might have been that BBN no longer
had to but 316s from Honeywell and instead got to make the margin on the
hardware sale because it manufactured the computer.
On 3/16/2020 10:43 AM, Alex McKenzie via Internet-history wrote:
> Bernie et al,
> I am quite sure that the C/70 never ran the IMP code.
> The MBB was probably funded by ARPA and its development was (I think) recorded in BBN QTRs to ARPA and definitely in other BBN Technical Reports. But I think the C/70 was a BBN internal (self funded) project and (I think) was not in QTRs. I do think there was at least one technical paper about the C/70 given at a conference but I can't find any reference, so perhaps not.
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