Re: New Risc and Decision Data Terminals

[stefan.tageson@xxxxxxxxxxxxx]

If the terminals are connected thru a 2720,2722 or 6180 twinax card there
will be a couple of new options that you might want to disable:

1. Split port operation, the new wsc will operate at two ports
concurrently.
2. Optimized mode, a feature that eliminate communication overhead (read
cut off headers) in the data stream
3. 2 Mbps mode which is a doubled clock frequency.

My own experiences so far is that feature 1 normally makes fiber-to-twinax
boxes go crazy, especially in combination with feature 3 and that some none
IBM devices are unable to handle feature 2 and/or 3.
To disable these innovations you have to create a dataarea in qsys with the
same name as the controller ,eg QSYS/CTL01 with length *char 6
with the following values:

position 1-2 = split port operation      '00' disables, 'FF' enables
position 3-4 = 2mbps mode                           '00' disables, 'FF'
enables
position 5-6 = optimized mode      '00' disables, 'FF' enables

use capital letters for the FF value.

After creating the dataarea(s) do a vary off and vary on for the changes to
take effect.
Good luck!!

// Stefan Tageson
+>----------------------------------------------------------------------<+
  tel:         +46 40 693 3500
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DAsmussen@aol.com on 99-02-09 04:53:42

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 To:      MIDRANGE-L@midrange.com                             
                                                              
 cc:      (bcc: Stefan Tageson/MMX/Sema Group/SE)             
                                                              
                                                              
                                                              
 Subject: Re: New Risc and Decision Data Terminals            
                                                              








John,

In a message dated 99-02-08 14:22:15 EST, you write:

> I have a client that just cut over to a new 170 Risc box running 4.3.
There
>  are a number of older decision data 387 color terminals that seem to be
>  failing with device errors.  We have switched them with some IBM
>  (naturally!) terminals and the problems seem to go away.  Has anyone
else
>  had or heard of this problem.  There are a lot of Decision Data
terminals
>  out there, I can't believe the all have to be replaced!

I've seen this several times w/DD terminals, especially way back when I did
a
lot of 36>400 migration work.  DD can easily fix this with a firmware
upgrade,
but it can get mighty pricey if you're not under DD maintenance :(...

HTH,

Dean Asmussen
Enterprise Systems Consulting, Inc.
Fuquay-Varina, NC  USA
E-Mail:  DAsmussen@aol.com

"The coldest winter I ever spent was the summer I spent in San Francisco."
--
Mark Twain
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