Re: Hayes Compatibility

[salfter@salfter.dyndns.org (Scott Alfter)]

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In article <d545131a.0310101333.46868051@posting.google.com>,
Gavin Picknell <gpnz@yahoo.com.au> wrote:
>Quite a long time ago I used to run a Warp6 BBS (v2.5) on my Apple
>IIe. I seem to remember that Warp6 required a "custom" cable when
>running on a IIe, there was some doco with it that mentioned how to
>wire it. I remember the symptom was that external modems would work
>fine with comms programs, but not with Warp6 unless you made the mod
>(which still allowed them to work fine with comms programs).

The "mod" probably just involved making sure you had a cable with full
hardware handshaking.  At slow data rates (2400 bps and below), you can dial
out just fine through a cable with as few as three wires: TxD, RxD, and GND. 
For anything more demanding, whether it's just a faster connection or
actually answering incoming calls (for a BBS, fax software, or whatever),
you need the additional signals that might not have been connected.  RTS and
CTS allow the flow of data to be started and stopped to avoid buffer
overflow, which you'd want for faster speeds.  DSR, DTR, and DCD allow the
computer to tell if the modem is connected properly and if it's connected to
a remote system.

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