Noob - CD ROM ISSUE

It says SCSI Not Ready!
I only have .wav and .pgm files on the cdrom. Is there a special format I need to use for the CD?

Is the cd rom drive terminated? The big centronics scsi drives usually require an external terminator if its the last device in a chain. Newer drives with scsi 2 like whats on the mpc 2000xl usually have a switch that terminates from inside the case. Course if you have the 2000 classic, it can't read wav.