Atari 400 User Manual

Atari 810 Disk Drive 243
If the program file specified by ENTER or LOAD is present on the
specified
drive, it will be loaded into memory . When the loading
process has been completed, the READY prompt will be
displayed.
If the program specified by ENTER or LOAD is not present on the
drive indicated, error 170 (File Not Found) will occur.
The
LOAD statement will erase any existing program in memory
when the new program is loaded. The ENTER statement merges
the
program being loaded with any existing program lines in
memory . If the program being loaded contains line numbers
which duplicate those of the program in memory, the incoming
program lines will replace the duplicate lines in memory. Any
existing program lines in memory can be erased by entering the
NEW statement
before executing an ENTER statement.
LOADing and Executing a Program
In the following series of statements, a BASIC program is loaded
with the LOAD statement, and then executed with the RUN
statement.
LOAD "D:PROGA.BAS"
READY
RUN
This process can be shortened
to a single step by including the
LOAD statement's parameter with the RUN statement. An
example of this usage of the RUN statement is given below .
RUN "D:PROGA.BAS"
In
the preceding example, PROGA. BAS will be executed as soon
as it is loaded.
Chaining Programs
The RUN statement can be included as a program line in one
program in order to load and execute another program. This
process is known as chaining.

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)