I've revisited the RS232 signal definitions and can't see one called "busy". I
know about software handshaking, and even hardware handshaking, but I don't know
of a 'busy" signal. Which pin is that?
Dick
----- Original Message -----
From: "Tony Duell" <ard_at_p850ug1.demon.co.uk>
To: <classiccmp_at_classiccmp.org>
Sent: Friday, April 13, 2001 7:26 PM
Subject: Re: 50 pin SCSI to 50 pin centronics
> > > At 07:17 PM 4/13/01 +0100, Tony Duell wrote:
> > > >Oh, brilliant... Many serial printers (Epson, etc) have the busy line on
> > > >pin 11. So plug that into an Amiga serial port with a straight-through
> > > >cable and you'll cook something in the sound circuitry.
> > >
> > Since when do serial printers have a BUSY line at all?
>
> Oh, most do. The really old ones (Teletypes, Decwriters, etc) don't --
> they operate at a baud rate low enough that you can't send characters
> too fast for them. But most more recent printers have some kind of
> internal buffering and handshaking -- either software handshaking
> (XON/XOFF, ETX/ACK) or hardware handshaking (Busy line, for example).
>
> Epsons (and things emulating Epsons, and more recent DECwriters, like the
> LA100) seem to put the busy signal on pin 11 (at RS232 levels, of
> course). Some other makes (like my Apple LW2NT) use the normal lines
> (RTS, DTR, etc) for this.
>
> -tony
>
>
Received on Fri Apr 13 2001 - 20:51:15 BST