Atari 800 Basic Reference Manual

ARITHMETIC
OPERATORS
LOGICAL
OPERATORS
6 General Information
l{if31;5f.J:I
Break key: Pressing this key during program execution causes
execution to stop. Execution may be resumed by typing CONT
followed by pressing tw!lltl .
System Reset key: Similar to l!mEI in that pressing this key
stops program execution. Also returns the screen display to
Graphics mode 0, clears the screen, and returns margins and
other variables to their default values.
Tab key: Press Emm and theki!i13!;§i·i:ikeys simultaneously to
set a tab. To clear a tab, press the Gi3 and 4iiiid!;U!:I keys
simultaneously. Used alone, thekiU3!;§t.j;iadvances the cursor to
the next tab position. In Deferred mode, set and clear tabs by
preceding the above with a line number, the command PRINT, a
quotation mark, and press the Iakey.
Examples:
100 PRINT " Ia E!llil! k1U3!;$f.i:i "
200 PRINT " .. BD Ki#@d!;lt.i;i "
Default tab settings are placed at columns 7, 15, 23, 31, and 39 .
EmiiJ Insert key: Press the 1@1$4 and EmiiJ keys simultaneously to
insert a line. To insert a single character, press the Bi3 and
mm keys simultaneously.
l@§ij:f.\3¥1 Delete key: Press the «i:U:iM and ED keys simultaneously
to delete a line. To delete a single character, press Gi3 and
llE!DJ simultaneously.
Mh!J:H3¥i Back Space key: Pressing this key replaces the character to the
left of the cursor with a space and moves cursor back one space.
Emil Clear key: Pressing this key while holding down the 41:11$4 or
mill key blanks the screen and puts the cursor in the upper left
corner.
Return key: Terminator to indicate and end of a line of BASIC.
Pressing this key causes a numbered line to be interpreted and
added to a BASIC program RAM. An unnumbered line (in Direct
mode) is interpreted and executed immediately. Any variables
are placed in a variable table.
The Atari Personal Computer System uses five arithmetic operators:
+ addition (also unary plus; e.g., + 5)
subtraction (also unary minus; e.g., - 5)
* multiplication
I division
A exponentiation
The logical operators consists of two types: unary and binary. The unary
operator is NOT. The binary operators are:

Atari 800 Specifications

General

Brand	Atari
Model	800
Category	Desktop
Language	English