Atari 400 User Manual

42 User 's Handbook to the Atari 400/ 800 Computers
statement program line.
100 A = B * 7:PRINT A:PRINT B
Abbreviating Keywords
Many of the Atari BASIC keywords ca n be abbreviated. For
example, the keyword PRINT can be abbreviated with the
symbol "?". Generally however , keywords are abbreviated with a
single letter or several lette rs follow ed by a period. For exa mple ,
the
keyword GOTO can be abbreviated as follows .
G.
The various abbreviations for the k eywo rds are contained in
Appendix B.
Listing a Program
As mentioned earlier, the LIST co mmand can be used to display
program lines currently s tored in RAM . Re member , if the NEW
command is issued or if the Atari is turned off, the progr am in
RAM will have been erased, and can no longer be displayed by
LIST.
LIST is used with the following configuration,
LIST (line 7, line 2)*
where line 7 is the line number of the first line to be listed, and
line 2 is the line number of the last line to be listed.
LIST can be used without any parameters to list the e ntire
program. LIST can also be used with a single line number to list
just that program line.
* In this chapter, a standard format will be used to describe BASIC
keyword configurations. Th e keyword will be displayed in our
regular type style in upper case. Paramete rs will be displayed in
our italic type style in lower case . Optional paramete rs will be
enclosed in parentheses.

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)