Atari 800 User Manual

Atari 810 Disk Drive 247
channel number to be assigned elsewhere.
Also,
if a file that was open for output is not properly closed, data
may be lost. Closing
an output file causes any remaining data in
the disk
drive buffer to be output followed by an end-of-file
record. If the open file is not properly closed, the data in the disk
drive buffer may be lost.
The
following CLOSE statement,
CLOSE #4
will close channel 4.
All open files are closed automatically when an END or RUN
statement is executed, or when a program's last statement is
executed (only in the program mode). However , it is good
programming practice to close any open files with the CLOSE
statement.
Writing to a Data
File
Once a file has been opened , data can be written to that file
using the PRINT# or PUT statements.
The
PRINT# statement uses the following configuration when
used to output data to a disk file.
PRINT #channe/; expression
channel indicates the channel to be used to send the output.
Use the channel assigned to the file in the OPEN statement.
expression consist of one or more string or numeric values to be
output. These values are output as ASCII values.
Data
is output to the disk drive via the disk drive buffer. The disk
drive buffer stores data output from PRINT# statements until the
buffer fills or an end-of-line character is encountered.
The disk drive buffer has a capacity of 125 characters. Therefore,
data will be output from the buffer to the diskette in 125

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