Re: Bidirectional parallel port

To: <quickcam-drivers@crynwr.com>, <jmk@hi-key.com>
Subject: Re: Bidirectional parallel port
From: "Steve Krattiger"<stevek@sourcecom.com>
Date: Fri, 30 May 97 13:43:26 -0800
Delivered-To: quickcam-drivers@crynwr.com


Did you write your own drivers?

There are two reserved bits in the Control register (highest 2 bits 6&7).  I've 
found that some computers require these to both be set to logic '0' for 
bi-directional mode to work.

So if you read in the control bits, change a bit, and write it back, make sure 
that the 2 highest bits are '00'.

Just my $.02.

Steve Krattiger

>______________________ Reply Separator _________________________________
>Subject: Bidirectional parallel port
>Author:  Jim Kaufman <jmk@hi-key.com> at SMTP-Gateway
>Date:    5/30/97 2:45 PM
>
>
>I have received a shipment of motherboards that 
>absolutely refuse to work in bidirectional mode. I have 
>set them to EPP in CMOS, but they only work as 
>uni-directional ports.
>
>Any workarounds, fixes, ideas?
>
>jmk
>--