Atari 800 Basic Reference Manual

POINT (P.)
PRINT (PR or?)
PUT(PU.)/
GET(GE.)
READ (REA.)
DATA (D.)
28 I/0 Commands and Devi ce s
Format:
Example:
POINT #aexp, avar, avar
100 POINT 112, A,B
This command is used when reading a file into RAM. The first avar specifies the
sector number and the second avar specifies the byte within that sector where
the next byte will be read or written. Essentially, it moves a software-controlled
pointer to the specified location in the file. This gives the user "random" access
to the data stored on a disk file. The POINT and NOTE commands are discussed
in more detail in the DOS Manual.
Format: PRINT [#aexp] { :} [exp] [ ,exp .. .]
Examples: PRINT X, Y, Z, A$
100 PRINT "THE VALUE OF X IS ";X
100 PRINT "COMMAS", "CAUSE", "COLUMN", "SPACING"
100 PRINT #3, A$
A PRINT command can be used in either Direct or Deferred mode. In Direct
mode, this command prints whatever information is contained between the
quotation marks exactly as it appears. In the first example, PRINT X, Y ,Z,A$, the
screen will display the current values of X,Y,Z, and A$ as they appear in the
RAM-resident program. In the last example, PRINT #3,A$, the #3 is the file
specifier (may be any number between 1 and 7) that controls to which device
the value of A$ will be printed. (See Input/Output Devices.)
A comma causes tabbing to the next tab location. Several commas in a row cause
several tab jumps. A semicolon causes the next aexp or sexp to be placed im-
mediately after the preceding expression with no spacing. Therefore, in the
second example a space is placed before the ending quotation mark so the value
of X will not be placed immediately after the word "IS". If no comma or
semicolon is used at the end of a PRINT statement, then a £lmD is output and
the next PRINT will start on the following line.
Format: PUT #aexp, aexp
GET #aexp,
Examples: 100 PUT 116, ASC(" A")
200 GET 111,X
The PUT and GET are opposites. The PUT command,outputs a single byte from
0-255 to the file specified by #aexp. (II is a mandator y character in both these
commands). The GET command reads one byte from 0-255 (using #aexp to
designate the file, etc. on diskette or elsewhere) and then stores the byte in the
variable avar.
Formats: READ var [ , var ... ]
DATA adata [ , adata .. .]
Examples: 100 READ A,B,C,D,E
110
DATA 12,13,14,15,16
100 READ A$,B$,C$,D$,E$
110
DATA EMBEE, EVELYN, CARLA, CORINNE, BARBARA
These two commands are always used together and the DATA statement is
always used in Deferred mode
1
•
The DATA statement can be located anywhere
1
A Direct mode READ will only re ad data if a DATA s tatement was executed in th e pr o gram.

Atari 800 Specifications

General

Brand	Atari
Model	800
Category	Desktop
Language	English