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November 2004, Week 4

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Subject:
Serial device FDEVICECONTROL question
From:
Peter Smithson <[log in to unmask]>
Reply To:
Peter Smithson <[log in to unmask]>
Date:
Wed, 24 Nov 2004 08:02:22 -0600
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 Hello,

I'm helping migrate some code from MPE to HPUX which uses
FDEVICECONTROL.  At some point there's a call to this intrinsic with the
parameters 192, 32 with a NUL character in the buffer.

The manual says this

"Read trigger and block mode trigger character:

Specify which character the DTC should send to trigger a character mode
or block mode read on a device. The standard trigger character is DC1.
If a NUL character is specified, there is no trigger character."

In UNIX terms, does this just mean that the particular call (with NUL)
is turning off flow control?  I'm guessing since DC1 is a flow control
character.

Thanks.

Peter

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