On 2010-02-24 11:38 -0800, wren wrote:
I can't seem to understand how to get my Pismo and my LaserJet 6MP to
speak to eachother. I use the 6MP with a parallel port to USB cable
with my eMac and it works like a dream. When I try to plug it into the
Pismo's USB port, however, only rarely will I catch the HP flicker in
the printer and fax preferences window. It doesn't stay on - and it is
very briefly appearing.
Thoughts on how I can solve this?
Running Tiger 10.4.11 on the Pismo - but Panther 10.3.9 yet on the
eMac. Is it a Tiger issue? Or perhaps a Pismo issue?
My guess:
Your USB to Parallel Cable supports UHCI but not OHCI (Open Host
Controller Interface) when connected to a USB1 port.
See http://en.wikipedia.org/wiki/OHCI
Your eMac supports USB 2.0 - when plugged in your converter cable
sees a USB2.0 port and communicates via the EHCI standard common to
all USB2.0 devices.
When plugged into your Pismo, your cable sees a USB1.1 port and tries
to communicate via UHCI standard. However, the Pismo only supports
OHCI.
Two ways to fix this:
(1) get a USB to parallel cable which supports the OHCI standard
for USB 1.1 devices.
or (2) Add USB 2.0 ports to your Pismo via PCMCIA card
hth.. AD
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