Atari 400 Basic Reference Manual

Keyboard Controller Program, H-14
Keys
Special
Function
ATARI, 5
BACK SPACE, 6
BREAK, 6
CAPS!LOWR, 5
CLEAR, 6
DELETE,6
ESCAPE, 5
INSERT, 6
RETURN, 6
SYSTEM RESET, 6
TAB, 6
Editing
CTRL (Control) Key, 13
SHIFT
key, 13
Cursor Control, 14
Down arrow, 14
Left arrow, 14
Right arrow, 14
Up arrow, 14
Keywords
BASIC, A-1 through A-5
L LEN, 38
LET,2, 3,10
Letters
Capital (upper case), 3
Lower case, 3, 47
lexp, 4
Light Show Program, H-8
Line
Format, 3
Logical, 2
Numbers, 3
Physical, 2
lineno,5
LIST, 10
LOAD, 26
Load
program from cassette tape, 24
LOCATE, 48
LOG, 34
Loops
Endless,
17
Nested, 15
lop, 4
LPRINT,
26
before CSA VE, 24
Luminance, 50
M Mandatory# symbol, 26, 27
Margins
Changing, 36, 46
Default in mode 0, 46
Matrix, 41-42
Variable, 4
Memory Map, D-1 through D-2
Modes,
graphics , 46, 47
Modes, operating
Deferred, 5
Direct, 5
Execute, 5
Memo Pad, 5, 25
Modes,
text, 46
Override split-screen, 47
Multiple commands (see
Command Strings)
mvar, 4
N NEW, 10
Notations
floating point, 39
in manual, 3
0 ON/GOSUB, 20
ON/GOTO, 20
OPEN, 26-28
Operators, 2
Arithmetic, 4, 6
Binary, 6, 7
Logical,
4, 6
Relational, 7
Unary, 6
Output devices, 23
Oversized programs (see Chaining Programs)
P Paddle Controller, 59
Parentheses,
Usage , 7, 63
PEEK, 35
Peripheral devices (see Input / Output Devices)
Pitch
Definition, 57
Values, 58
Pixel, 48
Size in modes, 47
PLA, 63
PLOT, 49
POINT,
28
POKE, 35
POP, 20-21
POSITION,
49
Precedence, operator, 7
PRINT, 3, 5, 14,
26
Printer listing, 10
Program continuation, 11
Programs,
Machine language, 67
User, Appendix H
with Hexcode Loader, 65, 66
PUT, 49
Q Question mark as prompt, 25
Quotation marks, 2
R RAD, 35
RAM
(Random Access Memory), 23
Random Access to disk file, 28
READ, 28
Direct mode, 28
REM, 10
RESTORE,
21
RETURN Key, 6
Return, Abnormal (see POP)
Rollover,
Keyboard, 8
RND, 34
Index 119

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)