I got my hands on an old Compaq DeskPro 4000 Pentium II. The motherboard has 1 IDE for the hard drive, and 1 for the floppy. Instead of having a 2nd IDE for the CD ROM it has a 39 pin connector between the floppy and hard drive. The machine doesn't have a CD ROM and I want to add one. I assume the 39 pin slot is SCSI, but I don't know for sure. Is there, or was there such a thing as a 39 pin SCSI?