Atari 400 Field Service Manual

400 POWER-UP.
PART 11
<3tarO
Turn
power OFF,
Insart SALT
II
Cartridge,
and
turn
power ON
RAM:
Do«9
screen look
like
Figure 3-2
See
NOTE 2
YES
NO
la
there
^40
color or
are
the coiors
off
YES
Go
to COLOR
BAR
Teat, P»ge
5-9
NO
Is the screen
solid
green,
yeilow, or
red
YES
Reeat SALT
II
Cartridg*
and
reteat
NO
Does
screen
look
like
Figure 3-1
Repeat
POWER-UP^—
*"
PART
I, Page 5-2
YES
NOTE 2
could be 3K.
16K.
24K, 32K. oe
40K
TIA:
couid
be
NTSC or PAL
ROM:
could be
-
MATH:NTSA:NTSA
MATH:NTSa:NTSB
MATH:PALA:PALA
'
MATH:PALS:PALB
ERR: ia
displayed for any
bad
ROM, verify
error
condition
via
VERIFY
aCM Teat,
Page
5-
Go
to COLOR
BAR Teat.
Page5-9l
ATARI
Home
Computer
5-8

Atari 400 Specifications

General

Manufacturer	Atari
Model	400
Type	Home Computer
Release Year	1979
CPU	MOS Technology 6502
CPU Speed	1.79 MHz
ROM	10 KB
Operating System	Atari OS
Keyboard	Membrane keyboard
RAM	8 KB (expandable to 48 KB)
Graphics	ANTIC and GTIA chips
Sound	4 channels
Display	RF output for connection to TV
Storage	Optional cassette tape drive or floppy disk drive
Ports	Cartridge
Display Resolution	320x192 (16 colors)