October 2004
Intermediate to advanced
304 pages
7h 44m
English
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Hack #18. Reeducate Plug and Play
The Microsoft Windows Plug and Play BIOS extension generally knows when a new device is installed, as you can see in Microsoft Windows when a "New hardware found" dialog appears, but it doesn't know if you've changed the configuration of a device through its configuration/setup program or using Windows Device Manager.
It is possible, depending on the capabilities of the respective device drivers (usually for PCI network and SCSI cards), to reconfigure an I/O device through Device Manager. This reconfiguration is not dynamic: Windows won't really know about it until Plug and Play BIOS tells it things have changed. That only happens at bootup, and sometimes only if the BIOS is told to look for the change. Merely changing a device's internal configuration does not constitute a new or removed device in Plug and Play's "mind," and it never gets it without some help.
To tell Plug and Play that things have changed by adding or removing an I/O device, or by "soft" changes you made within Windows, you have to reboot your system, enter the BIOS setup, and then force Plug and Play to reassess the system configuration. This gets the BIOS to reconfigure the system properly, and informs the operating system of the changes.
Reeducating Plug and Play is done by a parameter most often named "Reset Configuration Data" or "Reset NVRAM" (non-volatile RAM). NVRAM is an area of memory on the system board that stores Plug and Play data. Make sure that Plug and Play OS is ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.