Atari 400

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