Atari 400 User Manual

220 User's Handbook to the Atari 400/ 800 Comp uters
As shown in Illustr a tion s 7-7 and 7-8, a number of different disk
operations are available on the DOS Menu. To choose an
operation from the DOS Menu , enter the l etter corresponding
to that operation and press Return.
Once the disk operation has been c ho se n, a prompt message for
that operation will appear on the screen. Generally, this prompt
message specifies some additional information required by the
disk operation.
Once the disk operation has been chosen, the prompt ,
SELECT ITEM (DOS 1.0)
or
SELECT ITEM OR [RETURN] FOR MENU
will once again appear on the bottom of the video display.
If
another item is specifi ed, that disk operation's prompt will be
displayed . If Return is pressed, th e DOS Menu will be
redisplayed.
DOS MENU OPERA liONS
In the following sec tions , we will discuss the various DOS Menu
Operations.
A. Disk Directory
The Disk Directory operation lists the files present on a diskette.
When the Disk Dir ecto ry operation h as been specified by
entering A and pressing Return, the following prompt will
appear on the video display:
DIRECTORY-SEARCH SPEC, LIST FILE
If the Return key is pressed in response to this prompt, the names

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)