Atari 800 Service Manual

Figure 3-2. Special Graphics Using the CTRL Key
• RETURN - The RETURN key has three functions. First, if moves the
cursor to the left margin and down one line on the screen. Second,
RETURN marks the end of a logical line for the computer. Third,
RETURN activates the computer. The specific action taken depends on
the software.
• CLR-SET-TAB - This key operates much like the TAB key on a regular
typewriter. SHIFT and CLR-SET-TAB set a TAB stop at the cursor
position. CTRL and CLR-SET-TAB clear the TAB stop u nder the
cursor. CLR-SET-TAB by itself spaces the cursor over to the next
TAB stop. This key operates on logical lines so you can tab at any
position up to the 116 th character.
3-4 System Service Manual

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