Subject: Problem Apple printers
To: port-mac68k <port-mac68k@NetBSD.ORG>
From: Bill Studenmund <wrstuden@loki.stanford.edu>
List: port-mac68k
Date: 04/07/1996 16:08:02
Howdy!

The new version of the serial driver might be done soon, and I'd like to
get it to work with some of Apple's low-end laser printers. Mainly the
ones which you have to turn off in order to get NetBSD to boot.

Unfortunately I don't have one of these, so I can't figure out what's
wrong, though I think I know. So I need other people to help. I need
either someone who can find jucy technical info from the printer manual,
or someone with either an oscilliscope or a logic analyser.

Basically, I think these printers are sending the Mac a reference clock
so the Mac can send data to the printer faster. I need confirmation.
Also, I need to know how the data speed compares with the clock speed
(if the data's at 230 k baud, is the clock at 230 kHz, or at 3.6 MHz?).

Thanks!

Take care,

Bill