o Disk controller
o Keyboard
o Parallel
I/O
interface
o RS-232-C compatible serial interface (for external modems or serial devices)
o RAM cartridge slot (for expansion
to
512K bytes)
o Expansion bus interface
o Audio
output
jacks
o Video
output
connectors (RGB, NTSC, RF modulator)
Controller
Port
Interface
On the side of the computer, there are two nine-pin connectors
that
can be used for
many different kinds of controllers. Figure
8-1
shows one of the two computer connec-
tors and the corresponding face-on view of the typical controller plug.
Face
View-
Controller
Plug
Face
View-
Computer Connector
Figure
8-1:
Controller Plug and Computer Connector
216
Interface Hardware