Atari 400

26 User's Handbook to the Atari 400/ 800 Computers
Illustration 2-4. Installing a ROM Cartridge
Turning on the Power
Once your Atari system has been properly installed, you may
turn on its power. Use the following procedure in turning on the
various components of your Atari system.
1. Turn
on the television or monitor. If you are using a
television set, be certain both the set and the Atari are both
turned to the same channel. The switch connected to the
television set should be placed on computer.
2. If you are using the Atari 810 disk drive, turn on drive 1 and
insert a diskette
with the Atari disk operating system (DOS)
on it. Close the drive door once the diskette has been
inserted.
3. If a serial device that has been connected to the 850
I nterface Module is to be used, turn on the 850. Otherwise,
leave it turned off.