What is this jumper?

[TandyMan100]

http://www.x-plane.org/home/voynik/images/Jumpers.jpg
What is that jumper on the far left? My cd writer (which Windows won't recognize as a cd-RW) has that, and it has a jumper that was on it (I took it off), and I have no idea what it does. Anything?

[Jorg]

Its what it says; cable select.
In that case, the position on the cable decides if the drive is master or slave.

I prefer the hardwired solution (selecting master or slave manually) because it doesn't always work like it is supposed too- depending on the cable and the drives.

[TandyMan100]

no,no that cluster of pins on the far left of the drive itself. That isn't labeled.

[Jorg]

no,no that cluster of pins on the far left of the drive itself. That isn't labeled.

Sorry, I ate to many taco's.. I guess I have the taco flue! ;)
On most drives I know that are 'factory reserved' ones.. not that that helps you or would make you less curious..

[luckybob]

the "most likely" answer is that it is a serial interface, used by the factory to test and or flash the firmware of teh drive to set it to different regions.

[Dreamcast270mhz]

test it without the jumper, any difference?

[Ole Juul]

test it without the jumper, any difference? There is no jumper. :) It just looks like you could put one there because the pins are the same spacing. I too am curious what those pins are for. Perhaps luckybob is right and it's a serial interface.

[Chuck(G)]

My guess is it's a JTAG interface. Certainly there are several CD-ROM controller chips that are JTAG-capable. 6 pins would be about right, too.

[lutiana]

my guess is it's a jtag interface. Certainly there are several cd-rom controller chips that are jtag-capable. 6 pins would be about right, too.

jtag?

[Vlad]

http://en.wikipedia.org/wiki/JTAG

[lutiana]

http://en.wikipedia.org/wiki/JTAG

Right, thanks for the link, I guess I should have googled it before asking :D

Its got me checking all my CD-Roms now...