Atari 400 User Manual

38 User 's Handbo ok to the Atari 400/ 80 0 Comp ute rs
Illustration 3-1 contains an exa mple of the ent ry of a program in
the program mode and it s exec ution .
Illustration 3-1. Program Mode Entry & Execution
READY
NEW
READY
10 PRINT "Jim Smith"
20 PRINT "1220 Euclid Ave"
30 PRINT "Cleveland, OH 44122"
40 END
RUN
Jim Smith
1220 Euclid Ave
Cleveland,
OH 44122
READY
•
Line Numbers
In the pro gram mod e, progr am lin es mu st begin with a line
number. A line number is a one thr ough five digit number
entered at the beginning of a program lin e. The line number at
the beg
innin g of a pro gram line is the on ly difference between it
a nd an imm ediate mod e lin e.

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)