30 Jan
2022
30 Jan
'22
7:55 p.m.
On Jan 30, 2022, at 12:21 PM, Mark Pizzolato - Info
Comm <Mark(a)infocomm.com> wrote:
On Sunday, January 30, 2022 at 5:34 AM, Reindert wrote:
CRC is both straightforward and tricky, so it would not be too strange to have bugs here.
Capturing a SIMH debug trace for the KG device would potentially be informative. The
diagnostic might be the easiest one to capture.
FWIW, PyDECnet has a universal CRC implementation that can be useful as a reference
implementation. The unit test script (tests/test_crc.py) shows test runs for every CRC I
have seen described, including lots of extremely obscure ones.
paul
The diagnostics in XXDP for KG11 completes
without problems, so far, so good.
It limits the scope to interface problems between Decnet11MP and Simh KG11.
We really don't know how robust the diagnostic is and if it exercises the same
details that are used by the DDCMP implementation.
You could run the DDCMP case with KG11 debugging enabled and identify what it is doing
precisely and then go back and see if the diagnostic is doing the same stuff...