Atari 800XL

1 2 3 4 5 6
1 2 3 4 5 6
A
B
C
D
A
B
C
D
Date: 2020-01-15
KiCad E.D.A. kicad (5.1.4-0-10_14)
Rev: 2Size: A4
Id: 9/11
Title: Atari 800XL Schematics
File: per_interface.sch
Sheet: /PER_INTERFACE/
ezContents
Schematics based on Atari 800 XL Service Manual
Includes fixes
Schematics tested on real hardware
PB4
14
VSS
1
PB0
10
PB1
11
PB2
12
PB3
13
PB5
15
PB6
16
PB7
17
CB1
18
CB2
19
PA0
2
VCC
20
R/W
21
CS0
22
CS2
23
CS1
24
2
25
D7
26
D6
27
D5
28
D4
29
PA1
3
D3
30
D2
31
D1
32
D0
33
RST
34
A0
35
A1
36
IRQB
37
IRQA
38
CA2
39
PA2
4
CA1
40
PA3
5
PA4
6
PA5
7
PA6
8
PA7
9
U23
6520A_PIA
R94
4.7K
R118 220
1
2
3
Q7
MPSA55
GND
GND
R85
3K
C79
22µF
R87
3K
R91
2.7K
L10
10µH
L11
BEAD
C68
100nF
C80
1nF
C81
1nF
GND
R88
3K
R95
220
GND
C93
100nF
GND
C95
10nF
C94
10nF
C90 1nF C89 1nF C88 1nF C84 1nF C87 1nF C86 1nF C85 1nF
89
U19D
74LS14
1011
U19E
74LS14
C83 1nF C82 1nF C91 1nF
R39
56K
R40
100
CR1
1N4148
C49
47µF
C92 1nF
GND
L19 10µH
L20 10µH
L21 10µH
L22 10µH
L26 10µH
L27 10µH
L28 10µH
L29 10µH
R127 220
R126 220
R125 220
R124 220
R123 220
R122 220
R121 220
R120 220
R119 100
L14
22µH
R117 100
R93
4.7K
R92
4.7K
GND
R86
3K
A[0..15]
D[0..7]
J1:INTERRU
J1:COMMAND
J6:FWD
J6:BACK
J6:LEFT
J6:RIGHT
J5:FWD
J5:BACK
+5V_A
+5V_A
J1:+5V
J1:MOT_CTRL
+5V_A
J8:_RST_SW
J8:18
+5V_A
PIA_PB0
+5V_A
J1:PROCEED
J5:LEFT
PIA_PB1
J5:RIGHT
J8:19
+5V_A
PIA_PB7
+5V_A
RW
J8:24
PHI2
RST
IRQ
+5V_A
PIA_CS
A1
D7
D6
D5
D4
D3
D2
D1
D0
A0
Reset circuitry
Keyboard connector (part)