6.5. Disk Controller
Disk controller contains the circuitry to control the floppy disk
drive.
In XT type computers the floppy disk controller is built in a
separate card called ‘floppy disk controller card’ which is
inserted in the expansion slot of the motherboard.
In AT type computers, the floppy and the hard disk controllers
are built in a single card called ‘disk controller card’. It is also
inserted in the expansion slot of the motherboard.
In the PS/2 type computers and nowadays in the clones the
disk controller circuitry is built in the motherboard.
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6.6. Cable
The cable connects the floppy disk drive(s) with the controller. It has normally 3 edge connectors to connect the following devices:
The floppy drive ‘A:’
The floppy drive ‘B:’
The floppy-drive controller (i.e., today the motherboard).
It is a 34-wire flat cable. One of the wires is marked with dark (red or black) color. It is the wire number-1. The cable has a twist in one end. This end is connected with the floppy drive, which we want to use as drive ‘A:’
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