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From: billdcat@crash.cts.com (William Mortimer)
Newsgroups: comp.os.rsts
Subject: Optimizing serial transfers
Summary: Need way to transfer data quickly via rs232 cable
Keywords: RSTS, PDP, kermit, protocols
Message-ID: <6437@crash.cts.com>
Date: 20 Dec 90 19:37:37 GMT
Sender: root@crash.cts.com
Lines: 26

I've been experimenting with KERMIT-11 on our PDP-11/73, and have found that
it won't do the job I need it to fast enough.

Our machine is a PDP, and we need to transfer large binary files back and
forth between it and a PC.  We've been using KERMIT on both machines, which 
are hardwired together via RS232 cable attached to serial ports on both
machines.  At 19,200 baud, it takes 12 minutes to transfer a 700 block
(354 kbyte) file.  This is too long.  I understand that the limitation may
not be in KERMIT, but in the RSTS operating system itself, but I'm not sure.

I have a few questions:

1)  Can KERMIT be optimized so the transfer will take less time?

2)  Can the machine's operating system be optimized in some manner so the
    transfer will take less time.

3)  Is there a better protocol that I can use under RSTS/E that will allow
    faster transfers?  IF so, where can I get the source code?

4)  Is there another way to go in through a serial port that doesn't require
    any additional hardware?

Please respond via e-mail if you can help me out.  Thanks in advance!

billdcat@crash.cts.com