Atari 400 Field Service Manual

400
RAM
Press R
and
RETURN
Enter the amount
at
RAM
to be
tested
(Refer Page 3-12
)
PASS
YES
NO
Press SYSTEM
RE5ET
The SALT II MENU
is
returned to the
screen
-
it tells
you how
much RAM
is resident.
YES Did
you select
nwre RAM to test
than is resident
in
the console
c
NO
K
UFJ
Ga
to RAM START
Press
and RETURN
Press
E
and
RETURN
Press C and RETURN
Press
R and RETURN
RAM TEST MATRIX
is returned to the
screen ( See Figure
5-2
and use
the
LEGEND provided
in
Table 5-t to decode
failure
)
Repair
components
and retest
Go to next
page
Go to
PORT Test,
Page
5-33
ATARI
Home
Computer
5-31

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)