Hi, my 2X CDROM reader have volume knob, eject and forward button and a 3mm stereo audio jack. I never see the schematics of CDROM reader. I suppose there are two separate section, one for IDE interface and the other for audio section. Also I suppose that the audio section to start need power and some logical levels. Do you agree? Ciao Leo -----Messaggio originale----- Da: Ben Stragnell A: PICLIST@MITVMA.MIT.EDU Data: sabato 20 febbraio 1999 23.22 Oggetto: Re: [OT] OLD CDROM reader & PIC >Leo, > >First off, if it has built in PLAY/STOP buttons, you could probably >just control those directly. > >If it's an IDE drive, then I'd imagine it should be fairly >straightforward. You just need to be able to read and write 16-bit >wide data to the drive, and there was a thread not so long ago >regarding connecting IDE devices to microcontrollers. If you're >using one of the smaller PICs, you could probably hack something >together using a 16-bit shift register, or a latch. >No need to worry about DMA or anything like that. >Check out the ATA and ATAPI specs - AFAIK the CD play, stop, pause >etc... commands are all accessible via ATAPI. > >If, on the other (third!) hand, it's a SCSI drive, well... I haven't >got a clue! > >Good luck, (and it's not such a crazy idea!) > >Ben > > >> I have a question to ask to this community; anyone have idea about the type >> of interface needed to build to permit the use of older 2X or 4X CDROM >> reader for play musical CDROM, without the PC?? >> >> It seems a crazy idea?? > > >-- >/***************************************************************\ >* Ben Stragnell * ben@codepuppies.com * >* 3D Programmer * ben@left.com * >* Left Field Productions * http://www.codepuppies.com/~ben * >\****************************************************************/ >