I've got an OLD Oce 9400 (actually it's a K+E 5800 but same thing).  I'd like to hook it up to my home PC for plotting check sets and making copies.  I can get it to successfully make copies but I have no idea how to go about hooking it up to my pc.  There's ports on the back of the printer for Centronics, SCSI and Serial connections.  My pc doesn't have these (the serial port is round and on my pc it's not?).

Do I need to get a SCSI card for my pc?  As you can tell I'm pretty computerly naive so I'd appreciate some help.

Thanks