"D MARSHALL" ) writes:
ive been trying to work that one out in the past
myself by grounding some of the ata pins on the back
one of time of to see if it starts playing.


john

That won't work one bit.

The IDE bus is a universal thing. No pins are dedicated to a specific
function, they are a databus. You have to set the control pins at
the right time, and send the data on the data pins. I've not paid
attention, but I think it's not even just a matter of setting up the data
pins and sending a byte to start it playing and another byte to advance
the track. Likely you have to send a packet of data for each function.

This is why the only way (if there aren't suitable buttons on the CDROM
drive) of controlling the drive is by adding a microprocessor, that controls
the bus and sends the right commands to the drive over that bus. Using
discrete logic will require too much circuitry.

Michael

"krygods" wrote in message
lkaboutelectronicequipment
.com...
is it possible to add a play button to a cd-rom drive so that it is
possible to use the cd-drive as a stand alone cd player running through
some type of audio amplifier?? oh by the way... sony crx215a1 is the drive
i'm reffering to be modified... thnx