Atari 400 User Manual

Atari 810 Disk Drive 215
AT ARt DOS (Disk Operating System)
An operating system can be defined as a group of programs
which manage the computer's operation. A disk operating
system can be defined as a group of programs that manage the
transfer of data to and from a storage device such as disk or
magnetic tape.
Two d i
fferent versions of Atari DOS currently exist, DOS 1.0and
DOS 2.0. Th e version your system uses should be marked on your
system diskett e.
The major differences between DOS 1.0 and 2.0 are listed in
Table 7-2.
Table 7-2. DOS Version 1.0 & 2.0 Differences
DOS 1.0
DOS 2.0
11 second boot time 7 second boot time
No filename match char- Filename match characters
acters
allowed during certain DOS
operations
MEM.SA V not available MEM.SAV allows additional
memory space
No AUTORUN.SYS AUTORUN.SYS allows a file
to be
loaded and executed
upon boot
No appending of files
SAVE BINARY FILE "/A"
option allows appending of
two files
Bad diskette sectors
A diskette
with bad sectors
not indicated during
ca nnot be formatted
formatting

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)