[COLUG] Dosbox serial ports Dosemu

Dave Maxwell dmaxwell at columbus.rr.com
Wed Dec 5 17:42:09 EST 2007


On Wed December 5 2007, charles morrison wrote:
]
>
> Still, I get no blinky lights on my port and my program which is set up to
> be full duplex thinks it is getting an echo back from a device which is not
> connected. I have shorted pins 8-9 which are the CTS and RTS pins to make
> sure handshaking is not a problem.
>
> I have played with the udev file to set other groups and permissions, and
> anything other than the above causes an error message, such as permission
> denied.
>
> I really believe I am minutes from having this thing working, but need some
> ideas on what I can try next, with Dosemu.
>
> Charlie Morrison

These USB serial adaptors vary in quality.  Most don't support full hardware 
handshaking.  For many apps, that doesn't matter but it is something to be 
aware of.  You'll also want to use something like minicom just to make sure 
the port is working.  Having an old serial port modem laying around is as 
good a test jig as any.  At the very least you should be able to do 
the "AT", "OK" dance.

For that matter, I'm not so sure about these USB ports and full duplex.  Is 
half-duplex a possibility.

Dave

-- 
<james> abuse me.  I'm so lame I sent a bug report to debian-devel-changes
		-- Seen on #Debian


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