Atari 400 Field Service Manual

Keyboard
Connection
Chart
PIN
CONNECTOR
NUMBERS
NUMBERS
400/2102
iOO/JlOS
300/2103
a00/J106
U
15
13
12
-15
!_
—
8
-23
-22
-30
-44
-7
-50
=56
10
—24
-21
-37
-36
-37
h-9
_L
-10
—
6
-5 —
4
-23
-26
-20 -19
•
38
I
-39
-3S
-51
•49
r
-34
-52
-48
11
16
AlOl
X2
13
IS
-11
-18
-40
-33
-53
-47
14
hi 2
I
-3
-27
-17
-41
-32
-54
I
-46
-13
-14
-2
-28
L
-16
-42
-31
-3S
-45
15
14
16
13
-29
-43
CONNECTOR
NUMBERS
17
12
600/J105
800/J106
600/2101
800/Z104
PIN
NUMBERS
Legend
1. KSC
15.
BRMr
29.
RTTUSN
43.
CAPS
LOWR
2.
1
1
16.
CLR
SET
TAB
30. CRTL
44.
SHIFT
3.
2
17,
Q
31.
A 45.
2
4.
3
18. w
32. S 46.
X
5.
4
19.
E
33. 47.
c
6.
5
20. S
34.
F 48.
V
7.
6
21. T
35.
49. B
a.
1
7
22.
Y
36.
H 50.
N
9.
3
23.
U
37,
J
51. M
10.
(
9
24,
I
33. K 52-
[
1
u.
)
25.
39. L
53.
3
12.
Cl-LAK
<
26. p
40.
1
54.
—7
—
-
/
13.
INSERT
27.
f
_
*l.
55.
/l\
14.
DELi-Ii:
3ACX
S
28.
_
1
42.
-
A
56. SHIFT
57
. SPACE BAS
ATARI
Home
Computer
7-3A

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)