Re: New Risc and Decision Data Terminals

[John Hall <jhall@xxxxxxxxxxx>]

Where is this documented ?

What about the 266C card which is the first controller on my 170 ?

TIA

John Hall 
Home Sales Co.
stefan.tageson@notes.sema.se wrote
> 
> 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
>   fax:         +46 40 693 3600
>   mobile: +46 708 51 3543
>   e-mail       stefan.tageson@notes.sema.se
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