Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!emory!wa4mei!holos0!wdh
From: wdh@holos0.uucp (Weaver Hickerson)
Newsgroups: comp.sys.ncr
Subject: 32-600 HPSIO HELP?!?!?!: what is "threshold on overrun tally error"
Message-ID: <1990Oct11.165115.4811@holos0.uucp>
Date: 11 Oct 90 16:51:15 GMT
Sender: wdh@holos0.uucp (Weaver Hickerson)
Organization: Holos Software, Inc., Atlanta, GA
Lines: 41

A plea for help!  Man fights Tower, Tower wins.  Round X.

A customer is having problems with communications input on a 6-2-1 board.
We've implemented software on his Tower that sends/receives files to/from a
Burrough's mainframe, in 1210 byte blocks.  Sending works just fine.
REceiving, we get errors occasionally.  My software on the
tower displays an error, hex-dumping the questionable block to a printable
file.  (The f**king protocol we're involved with has no way to request a
block level retransmission, so once a bad block is received, even if it's
block number 1,956, the only way to go is aborting and starting over.
That's another story)

Anyway, the block in question is always missing one or more bytes,
according to the datascope -vs- the block I got in the software.  At 9600 
baud, the problem is more prevalent, and generates errors on the system 
error log.  

                     Here is a rough transcript:
+-------------------------------------------------------------------------+
HPSIO terminal incident
Subsystem/Module: tt03
Controller Address: 00ff1400
Hardware Status: threshold on overrun tally error  
# of errors: 100
Mode of operation at error time: 9600,even parity,1 stop bit,7 data bits
Link signals at error time:  DSR  DCD  CTS  DTR  RTS

Simultaneous Driver activity: 5, 3, 2, 0
+-------------------------------------------------------------------------+
This is driving us crazy.  We dropped down to 4800 baud, and the same
problem persists, but with no system error messages generated.

Does anybody know what "threshold on overrun tally error" means?  Could we
have a defective HPSIO board here, bad port or something?  Is a block
length of 1210 too large for these handy-dandy HPSIO's?

I'm begging...

Weaver
-- 
-Weaver Hickerson   Voice (404) 496-1358   :  ..!edu!gatech!holos0!wdh