linuxppc_2_4_devel patch for arch/ppc/kernel/gen550_dbg.c

linas at linas at
Fri Jun 6 08:25:50 EST 2003

On Thu, Jun 05, 2003 at 02:46:42PM -0700, Mark A. Greer wrote:
> This patch add in the check to see if the UART already appears to be
> +	 * We assume that no-one uses less than 110 baud or
> +	 * less than 7 bits per character these days.
> +	 *  -- paulus.

'These days' is a relative term, but last I looked, a few years ago,
I still had a freind who was using a 6-bit airline protocol on a
synchronoous serial port.

Yes, 6-bits means capital letters only.  (26 alpha + 10 num + misc=64)

The protocol was still being used in many travel agencies to support
older terminals.  Our travel agency received it encapsulated in
TCP on top of frame-relay.  The airlines provides a router which
sucks in frame-relay, and spits out 6-bit synch. serial.  We used
a serial cable to hook up a linux box, and converted the 6-bit
protocol into the tcp over ethernet that we wanted.

Thought you might enjoy reading this.  I'll skip over the detailed
description of the four different end-of-message markers in the protocol.


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