Atari 800 Basic Reference Manual

LOAD (LO.)
LPRINT (LP .)
NOTE (NO.)
OPEN (0.)
CLOSE (CL.)
26 J/0 Commands and Devices
Format:
LOAD filespec
Example:
LOAD "D1:JANINE.BRY"
This command is similar to CLOAD except the full file name system can be used.
LOAD uses long inter-record gaps on the tape (see CLOAD) and uses the token-
ized version ofthe program. When using only one disk drive, it is not necessary
to specify a number after the "D" because the default is disk drive #1.
Format:
Example:
LPRINT [exp][ { : } exp ... ]
LPRINT "PROGRAM TO CALCULATE
X"
100 LPRINT X; " ";Y;" ";Z
This statement causes the computer to print data on the line printer rather than
on the screen. It can be used in either Direct or Deferred modes. It requires no
device specifier and no OPEN or CLOSE statement. (BASIC uses IOCB #7.)
The above program listing illustrates a program that will add 5 numbers
entered by the user. To print a program listing on the line printer, see LIST.
Format:
Example:
NOTE #aexp, avar, avar
100 NOTE #1, X, Y
This command is used to store the current disk sector number in the first avar
and the current byte number within the sector in the second avar. This is the
current read or write position in the specified file where the next byte to be
read or written is located. This NOTE command is used when writing data to a
disk file (see POINT). The information in the NOTE command is written into a
second file which is then used as an index into the first file.
Formats: OPEN #aexp,aexp1,aexp2, filespec
CLOSE #aexp
Examples: 100 OPEN #2,8,0, "D1:A T ARI800.BAS"
100 A$
= "D1:A TARI800.BAS"
110 OPEN #2,8,0,A$
150 CLOSE #2
Before a
device can be accessed, it must be opened. This " opening" process links
a specific IOCB to the appropriate device handler, initializes any CIO-related con-
trol variables, and passes any device-specific options to the device handler. The
parameters for the OPEN command are defined as follows:
#
Mandatory character that must be entered by the
user.
aexp Reference IOCB or file number to same parameters
for future use (as in CLOSE command). Number
may be 1 through 7.

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