Computer system with removable floppy disk drive and expansion slot assembly mounted flush in one corner

Claim 1

A computer system comprising: a computer mainframe having a rectangular recessed hole around one corner thereof, said rectangular recessed hole having a border, a flat bottom wall, a first vertical side wall and a second vertical side wall abutted at a respective inner end at right angles, two multi-pin connectors on said first vertical side wall, a mounting board raised above said flat bottom, two spring latches disposed in respective holes on said flat bottom wall along said border and driven by respective bolts into respective unlocking positions from respective normal locking positions, an elongated mounting groove disposed along said second vertical side wall; a floppy disk drive and expansion slot assembly fitted into said rectangular recessed hole in a flush manner, said floppy disk drive comprising two connectors electrically and respectively connected to the multi-pin connectors on said mainframe, a recessed hole disposed on a bottom surface thereof, into which said mounting board of said mainframe fits, two lock holes disposed on the bottom surface of said floppy disk drive and expansion slot assembly, into which said spring latches engage respectively, a slot on a front vertical side wall of said floppy disk drive and expansion slot assembly for inserting a disk or an expansion card, and a rail on a rear vertical side wall of said floppy disk drive and expansion slot assembly fitted into said mounting groove to hold said floppy disk drive and expansion slot assembly in place.