Path: utzoo!attcan!uunet!lll-winken!csd4.milw.wisc.edu!leah!rpi!rpi.edu!deven
From: deven@pawl.rpi.edu (Deven Corzine)
Newsgroups: comp.sys.amiga.tech
Subject: Re: modem drops 0x11
Message-ID: <DEVEN.89May12044249@daniel.pawl.rpi.edu>
Date: 12 May 89 08:42:50 GMT
References: <431ebd96.15abd@gtephx.UUCP>
Sender: usenet@rpi.edu
Organization: RPI Public Access Workstation Lab, Troy NY
Lines: 27
In-reply-to: carnesm@gtephx.UUCP's message of 9 May 89 15:15:04 GMT

In article <431ebd96.15abd@gtephx.UUCP> carnesm@gtephx.UUCP (Mark E. Carnes) writes:
[...]
>All the characters were transmitted except for 0x11.  I reproduced it
>several times each time when a 0x11 should have been sent it
>"disappeared".

0x11 is a ^Q, otherwise known as XON.  Sounds like a flow control
problem.

>I am using a Supra 2400 modem.  The program is written in C and just
>uses pretty typical IO, (i.e. Opens the serial.device and issues a
>write command specifying the string and its length) and of course it
>works for everything but the character with a value of 0x11.

I doubt the Supra is responsible; I'm using a Supra 2400, and it
transmits a 0x11 (^Q) just fine.  Neither is the language the problem.
What likely IS the trouble is the "pretty typical IO."  Typically,
XON/XOFF flow control is enabled.  Disable the flow control, either
with a SDCMD_SETPARAMS or by turning Xon/Xoff flow control off within
Preferences.

Deven
--
shadow@[128.113.10.2]   <shadow@pawl.rpi.edu> Deven T. Corzine (518) 272-5847
shadow@[128.113.10.201] <shadow@acm.rpi.edu>  2346 15th St.    Pi-Rho America
deven@rpitsmts.bitnet   <userfxb6@rpitsmts>   Troy, NY 12180-2306  <<tionen>>
"Simple things should be simple and complex things should be possible." - A.K.