HP3000-L Archives

October 2001, Week 1

HP3000-L@RAVEN.UTC.EDU

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Subject:
From:
Curtis Larsen <[log in to unmask]>
Reply To:
Curtis Larsen <[log in to unmask]>
Date:
Tue, 2 Oct 2001 10:43:51 -0500
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Thanks, Wirt -- lemme elaborate a tad:

We have this thing (a Hitachi 704 "Chemical Analyzer" for anyone who
know about 'em) working on a 969 running MPE/iX 5.5, and are now trying
to test it on a 918(6.5) prior to upgrading.  Accoring to Those Who
Know, the instrument requires ENQ/ACK, and when we migrated from a
948(4.5) to the 969(5.5) we (apparently) had to write a little TTUTIL
file to make it happy.  Looking at that same file, I see that it looks
like it was just set up to not expect or send anything (NULLs
expectation/xmit) so maybe this was the way around the handshaking
issue.

So now we're trying to figure out what why it doesn't work on 6.5 with
precisely the same terminal set-up and DTC configs.  The mention of
ENQ/ACK came up again, and now after further investigation, I'm
scratching my head and mumbling.  (Common occurrence, of course, just
more pointless in this particular case.)

Suggestions?  Anybody?

Thanks,
Curtis


>>> <[log in to unmask]> 10/02/2001 10:23:06 AM >>>
Curtis,

> http://docs.hp.com appears to be belly-up -- can anyone tell me where
I
>  can specify ENQ/ACK on a connection type?  I've got a
sperially-conncted
>  instrument that requires such, so I'm looking in TTUTIL, but I only
see
>  a "Uses XON/XOFF (Y/N)" kind o' thing, which may or may not work,
>  depending upon what flow control is assumed if you say "No".

I'm nearly 100% sure that the ENQ/ACK protocol went away with the
arrival of
the first RISC machines and simply doesn't exist any longer.

Wirt Atmar





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