heres a pic
http://www.tomshardware.com/storage/...es/jumpers.jpg
hes talking about the circuit board of the drive, not the PC. the EDIT2: are the ones you want,
its technically ok to have cd and hdd on same IDE cable, but it'll slow down your hard drive to the speed of your CD when using it, if you can use one cable fro HD drives and the other for CD, jaz, zips etc