Above: This is the inside of an IBM PC AT, with all of its ports in place.

Port 2 Above: This is a Combo card, extended memory card. It is AST made.

Port 3 Above: This Extended Graphical Array Card is a Video board, hand done.

Port 5 Above: This is an Intelligent Printer interface, XRC (centronics).

Port 6 Above: This is a Case Interface, both parallel and serial.

Port 8 Above: This is a Western Digital Disk Drive Interface Card.

This is the motherboard of the IBM PC AT.

Above: This is the hard disk drive top board (motor regulation drive).

Above: This is the hard disk drive bottom board (power for drive, connections, interface card).

Above: This is the back of port 6, the case interface, but displays buses (the connections).

Above: Floppy Disk Drive (5.25 in) 360 KKB

Above: 5.25 Floppy Disk Drive top view.

Above: 5.25 Floppy Disk Drive bottom view.