Well, no luck on removing the lp driver et cetera under Ubuntu, so I am going to try reverting my Linux distribution, or going to NetBSD for the emulator instead. Kevin Date: Mon, 5 Mar 2012 10:26:38 -0800 From: Kevin McQuiggin <mcquiggi at sfu.ca> To: cctech at classiccmp.org Subject: Re: Anyone Having Problems With CHD's RX01 Emulator and Ubuntu 11.10? Message-ID: <200AF799-973C-4E82-9AA9-1C4184B43B54 at sfu.ca> Content-Type: text/plain; charset=us-ascii A short update on this problem: Further info, I am going to try to unload the kernel's "lp" and "parport" drivers to see if they are interfering with the emulator's access to the parallel port. "lsmod" shows them loaded, I recall that I can "rmmod" them (or some similarly-named command). I am not a native Linux person, BSD is much to my preference! This was necessary for proper operation of a JTAG programmer that I was using to "unbrick" a dead router a few months ago. Ubuntu's (Debian's) "lp" drivers interfered with the utility's manipulation of the parallel port signals when talking to the router's JTAG port. I am hoping that this will be a similar situation. I'm going to try it when I get home from work. Kevin