Atari 800 User Manual

Atari BASIC Reference Guide 115
example, if the program in memory contained line numbers 10 ,
20,30
... , and the program being loaded (using ENTER) contained
line numbers 5, 15, 25 , 35, ... , the resulting program in RAM
would include the line numbers from each of the two programs.
ENTER does not alter the pro gram in memory unless the
program being e ntered has the same line numbers as the
program being loaded. For example, if the program in memory
contains line numb e rs 10 , 20, 30,40, 50 , and 60 and the program
being entered contains 10 , 20, 30 ,4 5, 55,70, 80, and 100, the new
program in memory will contain all of the ne wly entered
program , but only lines 40 , 50 , and 60 of the original program .
The
original lin es 10 , 20, and 30 in RAM will be replaced with
lines 10, 20, and 30 being loaded from cassette or disk. Lines 40,
50, and 60 of the original program remain unchanged.
ENTER is the only Atari BASIC state ment that ca n recover a
program without clearing the me mor y first.
When ENTER is u se d with the program record er, the tape must
be in the correct position prior to exec ution . Wh en the ENTER
statement is executed, the tone will so und once to re mind the
operator to pr ess PLAY on the record e r. The reco rder will be
activated aft er the RETURN key on the keyboard has been
pre sse d.
Wh en ENTER is us ed with a disk, the DOS must have been
boot ed first. If more than one disk is being us e d, the number of
the disk mu st be spec ified .
EXP
EXAMPLES
ENTER "C'
ENTER " D2:jONES"
The EXP function returns the expo nential of the argument. The
exponential is the value of e(2.71828179 ... ) raised to the power of
the argument.

Atari 800 Specifications

General

Processor	MOS Technology 6502
Processor Speed	1.79 MHz
ROM	10 KB
Graphics	ANTIC and GTIA chips
Release Year	1979
Display Resolution	up to 320 x 192
Colors	128 colors
Sound	4 channels
Storage	Cartridge, cassette, floppy disk
Ports	Cartridge, serial, monitor
Operating System	Atari OS