Atari 400 User Manual

Atari 810 Disk Drive 207
Floppy Diskettes
The most widely used type of disk storage with mi croco mputers
is floppy disk storage. A floppy diskette consists of a round vinyl
disk which is enclosed within a plastic cover. The diskette is
generally stored in a diskette enve lope .
This cover protects the diskette
from damage while it is being
handled by the operator. Th e diskette s hould never be removed
from its cover. A 5 114 inch diskette with it s protective envelope is
shown in Illustration 7-2.
The diskette
is allowed to rotate within the protective envelope.
The round hole in the middle of the diskette allows the disk drive
to hold the diskette and spin it. The oblong shaped opening on
the protective envelope provides an area where the head can
read
from or write to the diskette surface.
Illustration 7-2. Mini-Floppy Diskette
T empo rary Label
Permanent
Label
Diskette in
Protective
Cover
Exposed Read / Write
Head Slot
Diskette
Envelope
Write Protect Notch
(Some diskettes do
not have this notch)
Ind ex Hole

Atari 400 Specifications

General

Manufacturer	Atari
Model	400
Type	Home Computer
Release Year	1979
CPU	MOS Technology 6502
CPU Speed	1.79 MHz
ROM	10 KB
Operating System	Atari OS
Keyboard	Membrane keyboard
RAM	8 KB (expandable to 48 KB)
Graphics	ANTIC and GTIA chips
Sound	4 channels
Display	RF output for connection to TV
Storage	Optional cassette tape drive or floppy disk drive
Ports	Cartridge
Display Resolution	320x192 (16 colors)