"John H. Guillory" wrote:
> 
> Any idea on what HSKo and HSKi mean? I'm guessing something like High
> Speed something out and in.... High Speed Control?

I believe they are "Input HandShaKe" and "Output HandShaKe". They are
apparently RS-422 terms about which I am ignorant. Macs don't use
RS-232, but 422 is apparently close enough that it usually works with
some creative pinning.
 
> Incidently, thanks for the mapping of the port,
> would really love to know more about what HSKi and HSKo mean....

Try those sites that I gave the URL to. They seem knowledgable. Here's
the best one I've found:
http://www.mindspring.com/~jc1/serial/main.html
 
(snip about modems...remember, I am using a DTE printer device, but thanks!)

> >When DTR/DSR handshaking is selected, DTR is the ready control line from
> >the printer to the host. When the DTR control signal from the printer is
> >in the ON condition (positive voltage), the host may send data to the printer.
>   DTR is the printer's Ready signal?  I'd imagine that the printer
> would be a Data Set device, as most computers are Data Terminal
> Devices..... I'd expect the DSR being the printer/modem's way of
> saying its ready and the DTR being the computers sign that its
> ready....

I didn't design the thing, I just copied what the manual says :)

The printer is a DTE device so says the manual. In my experience,
printers are DTE devices requiring a different cable than a modem does.
The printer cable crosses the send and receive lines.

Thanks,

PB