Could somebody please post an example of reading controller button status (eg. which button is pressed) in assembly...?

If anyone needs any parts for the original Xbox let me know or even Xbox 360 I'm selling all parts super cheap let me know what you need.

Hi,
I just replaced my Philips VAD6011/21 Disc Laser Lens with a Disc Laser Lens for Xbox SPU-3141 Philips Microsoft original from ZedLabz Please login or register to see this link.
Unfortunately it is still not reading my xbox games discs.  I have the Rocky5 Softmod and it states a DVD drive status of "unknown".  It seems like I did it correctly and desoldered those two points on the new Disc Laser Lens.  Sometimes I will get the "Empty" status too.  
I tried Pot tweaks on the old laser and then that helped for a very short time so I bought the new laser after it stopped working.
Any ideas?
Thanks!