(comp.sys.hp48)
From: Lutz.Vieweg@p0.f20.n24730.z2.FIdonet.ORG (Lutz Vieweg)
Subject: IR-Transfer at double speed
Message-ID: <uucp.684342274@muffel>
Date: 7 Sep 91 16:27:06 GMT
Sender: daemon@seq.uncwil.edu
Organization: UNCW news/mail gateway service

Moin moin!

Yet another tool:

                        TSEND  &  TSERVE
                  IR-Data-Transfer at 4800bps

Did you never feel a little bit bored when you sent files
to another 48sx via the IR-Port?
The reason for the slow speed is simple: HP has limited
the IR-Transfer rate to 2400bps, no matter what settings
were made in the SETUP.

Now, this program enables you to send and receive files
using the ordinary KERMIT protocol, but at 4800bps.

Why not 9600bps you ask? The interrupt routine, that handles
the serial input is just to slow to manage 9600bps IR input.

I am going to write a ZModem protocol driver for the 48sx,
and maybe this one will do 9600bps IR transfer. But
I am lacking a detailed desciption of the ZModem protocol,
and I am not a C-programmer at all - only assembler sources
or simple descriptions may be valuable to me.

Let's get into terms: TSEND behaves like SEND, but it requires
a List of global names as argument, and transmittes via 4800bps
IR only. The SETUP is ignored.

TSERVE behaves like SERVER, but it uses 4800bps-IR-Transfer
without respect to the SETUP

cu, Lutz Vieweg.

PS:  Please do not send an answer to the adress given in the From:
     field above. Please send it to:
     Lutz.Vieweg@p20.f30.n247.z2.fidonet.org