RE: 5250 Start Field Funny Stuff

[Buck Calabro <buck.calabro@xxxxxxxxxxxxxxxxx>]

Leif Svalgaard wrote:

>Any of you 5250-gurus out there 
>(still any alive?):

Not a guru, but I have The Book (IBM 5250 Information Display System
Functions Reference Manual SA21-9247-06 Mar 1987)

>I get a data stream (from SEU) that contains 
>(among other stuff) these hexadecimal byte values:
>
>1D 40 00 81 00 24 00 99        
>
>the 1D in the middle is a SF (start field), 
>which normally should be followed by 
>a 2-byte length and a 2-byte field 
>format word.  What I actually got 
>(reproducible) does not make any sense
>(length of x'4000' ?)

The Book says that SF is followed by an optional 2 byte Field Format Word,
optional 1 or more 2 byte Field Control Words, 1 byte Screen Attribute and a
2 byte Field Length.  The FFW is described on page 2-68; the FCW  on pp 2-65
through 2-68.  Let me know if you need the definitions...

Buck Calabro
Aptis; Albany, NY
"We are what we repeatedly do.
 Excellence, then, is not an act, but a habit." --Aristotle


Billing Concepts Corp., a NASDAQ Listed Company, Symbol: BILL
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