Atari DOS 2.5: XF551 Owner's Manual page 18

4. Tum on your computer. The disk drive's BUSY light goes
on again as OOS loads into your computer.
If
you tum up
the volume on your TV, you can hear it beep as DOS loads.
5. When the READY prompt (from ATARI BASIC) appears on
your screen, type DOS and press
1
Reti.m
I.
DOS With and Without BASIC
Naturally, you won 't always be using DOS 2.5 with ATARI BASIC .
To load DOS without BASIC if you have an ATARI 400 , 800 , or
1200XL Computer, simply follow the steps explained above
with-
out
inserting your BASIC cartridge and omit step 5.
1f
you have an ATARI XE Game System, 130XE, 65XE, or 8OOXL,
your computer is equipped with built·in BASIC. BASIC is loaded
into your computer whenever you turn
it
on, including when you
load DOS - unless you first insert a program cartridge in the
computer's cartridge slot or you hold down the
~
key on
your computer console as you turn it on.
As you've seen, going from BASIC to DOS is easy - justlype
DOS and press 1
Retl.rn J.
Going from DOS back to BASIC is just as
easy; see " Running a Cartridge From DOS.
I I
Boot Errors
Loading a program into a computer when you first turn it on is
called
booting up.
If a problem occurs when booting up your sys-
tem , the following appears on your screen :
8