Atari 800 Basic Reference Manual

DOS (DO.)
ENTER(E.)
INPUT (I.)
Format:
Example:
DOS
DOS
The DOS command is used to go from BASIC to the Disk Operating System
(DOS). If the Disk Operating System has not been booted into memory, the com-
puter will go into Memo Pad mode and the user must press IMMM';!i@!ll to return
to Direct mode. If the Disk Operating System has been booted, the DOS Menu is
displayed. To clear the DOS Menu from the screen, press *'itii#&l;li!Mi. Control
then passes to BASIC. Control can also be returned to BASIC by selecting B (Run
Cartridge) on the DOS Menu.
The DOS command is usually used in Direct mode; however, it may be used in a
program. For more details on this, see the Atari DOS Manual.
Format: ENTER filespec
Examples: ENTER "C
ENTER "D:DEMOPR.INS"
This statement causes a cassette tape to play back a program originally recorded
using LIST (see Section 2, LIST). The program is entered in unprocessed (un-
tokenized) form, and is interpreted as the data is received. When the loading is
complete, it may be run in the normal way. The ENTER command may also be
used with the disk drive. Note that both LOAD and CLOAD (see Section 2) clear
the old program from memory before loading the new one . ENTER merges the
old and new programs. This ENTER statement is usually used in Direct mode.
Format: INPUT [ #aexp { ; } ] { ~~;~ } [, { ~~~~ } .. . ]
Examples: 100 INPUT X
100 INPUT N$
100 PRINT "ENTER THE VALUE
Of X"
110 INPUT X
This statement requests keyboard data from the user. In execution, the com-
puter displays a? prompt when the program encounters an INPUT statement. It
is usually preceded by a PRINT statement thCJ.t prompts the user as to the type of
information being requested.
String variables are allowed only if they are not subscripted. Matrix variables
are not allowed.
The #aexp is optional and is used to specify the file or device number from
which the data is to be input (see Input / Output Devices). If no #aexp is specified,
then input is from the screen editor (E:).
If several strings are to be input from the screen editor, type one string, press
liiii!Jml, type the next string, l;i§iii;lll , etc. Arithmetic numbers can be typed on
the same line separated by c ommas.
10 PRWT
11
Et-iTER 5 NUt"18EPS TO BE SUt·1t·1ED
11
20 FOR t·~= 1 TO 5
30 I t · ~PUT ::-::
40 C=C+>::
50 NE>::T t·~
60 PR r HT II THE : ::ut ·1 oF '/OUP Nut·1E:ER::: If : II ; c
70 um
Figure 5-1 Input Program Listing
I/0 Comm a nds and De vices 25

Atari 800 Specifications

General

Brand	Atari
Model	800
Category	Desktop
Language	English