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This article was posted to the Usenet group alt.hackers in 1995; any technical information is probably outdated.

Re: Dial-back SLIP ?

Article: 7840 of alt.hackers
From: (James Rosemary)
Newsgroups: alt.hackers
Subject: Re: Dial-back SLIP ?
Date: 18 May 1995 00:18:15 GMT
Organization: University of Delaware, Newark
Lines: 18
Approved: yes
Message-ID: 3pe3o7$
Status: RO

>ObviouslyLameObHack: Building an RS232 cable with an extra connector in
>the middle so that I could monitor the communication between a windows
>program and the device I was communicating with so I could learn the
>protocol that it was using a duplicate it. I told you it was lame.
  Last time I did that, I just had wires dangling from the connector.
I left them in place after I was done and then wondered why I kept
losing data. Couldn't be the wires shorting out or anything.

  The terminal I am using uses a poor little 6502 that has to drag a
bitmap around with it. Screen updates are done when the processor has
free time. This causes a nasty 'slink' or 'wave' when scrolling. I
changed the display driver so that if there was no other work to do
it would move the bitmap for LF's instead of making it redraw all of
the characters, which takes alot longer.

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