Atari 400 User Manual

214 Use r's Hand b oo k to the Ata ri 400/ 8 00 Com pu te rs
Fil ename match characters are not al lowe d in Ata ri DO S ve rsion
1.0, and ca n o nly be used w ith th e foll ow i ng DO S me nu op ti ons
in DOS version 2. 0.
A. Disk Dir ectory
B. Copy Fil e
D. Delete Fil e
E. Rename Fil e
F. L oc k Fil e
G. Unl ock Fil e
O .
Dupli ca te Fil e
Table 7-1. Filename Ext ensions & Type of File
Filename
Extension
File Type
ASM
Asse mbl y language so urc e fil e.
BAK
Bac kup Fil e.
BAS
Fil e co nt a inin g a Ba sic program
in tokenized forma t.
DAT
Data Fil e.
OB]
Asse mb ly language pr og ram
asse mbl ed int o mac hin e language.
Al
so kno wn as an ob ject fil e.
TXT Text Fil e.
SY S
Sys tem fil e. U sed wit h sys tem pr o-
grams such as DO S pr ograms or the
BAS IC language int e rpr eter.

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)