Atari 800 XL ROSE Quick start guide

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: 1/11
Title: Atari 800XL Schematics
File: Atari800XL.sch
Sheet: /
ezContents
Schematics implemented and tested on real hardware
Includes fixes
Schematics based on Atari 800 XL Service Manual
Sheet: POWER
File: power.sch
+5V
Sheet: AUDIO
File: audio.sch
RF_MOD_AUDIO
Sheet: VIDEO_PROCESSING
File: video_processing.sch
RF_MOD_VDO
Sheet: CPU-GPU
File: cpu_gpu.sch
D[0..7]
A[0..15]
Sheet: MMU_ROMS
File: mmu_roms.sch
A[0..15]
D[0..7]
Sheet: CONTROL
File: control.sch
A[0..15]
MA[0..7]
Sheet: RF_MODULATOR
File: rf_modulator.sch
AUDIO_IN
VIDEO_IN
Sheet: POKEY
File: pokey.sch
A[0..15]
D[0..7]
Sheet: PER_INTERFACE
File: per_interface.sch
D[0..7]
A[0..15]
Sheet: MEMORY
File: memory.sch
D[0..7]
MA[0..7]
+5V_1 1
SHIELD 2
GND_1 3
+5V_2 4
GND_2 5
+5V_3 6
GND_3 7
J7
DIN-7_POWER
GND
GND
C18
100nF
S4 1
D0 10
D6 11
S5 12
+5V 13
RD5 14
CCTL 15
A3 2
A2 3
A1 4
A0 5
D4 6
D5 7
D2 8
D1 9
RD4 A
GND B
A4 C
A5 D
A6 E
A7 F
A8 H
A9 J
A12 K
D3 L
D7 M
A11 N
A10 P
R/W R
B-PHI2 S
J4
CART_CON
GND 1 GND 10
A7 11 A8 12 A9 13
A10 14 A11 15 A12 16 A13 17 A14 18
GND 19
EXTSEL 2
A15 20
D0 21 D1 22 D2 23 D3 24 D4 25 D5 26 D6 27 D7 28
GND 29
A0 3
GND 30 PHI2 31 GND 32
RESERVED 33
RST 34
IRQ 35
RDY 36
RESERVED 37
EXTERN_B 38
RESERVED 39
A1 4
REF 40
CAS 41
GND 42 MPD 43
RAS 44
GND 45
LR/W 46
RESERVED 47 RESERVED 48
AUDIO_IN 49
A2 5
GND 50
A3 6 A4 7 A5 8 A6 9
J9
PARALLEL_BUS
1
1
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18 19 19
2
2
S0
20
S1
21
S2
22
RST_SW
23
24
24
3
3
4
4
5
5
6
6
7
7
8
8
KR2
9
J8
KEYBOARD_CON
FWD
1
BACK
2
LEFT
3
RIGHT
4
B_POT
5
TRIGGER
6
+5V
7
GND
8
A_POT
9
J6
CONTROL_CON
FWD
1
BACK
2
LEFT
3
RIGHT
4
B_POT
5
TRIGGER
6
+5V
7
GND
8
A_POT
9
J5
CONTROL_CON
CLOCK_IN
1
+5V
10
SIO_AUDIO_IN
11
NC
12
INTERRUPT
13
CLOCK_OUT
2
DATA_IN
3
GND
4
DATA_OUT
5
GND
6
COMMAND
7
MOT_CTRL
8
PROCEED
9
J1
SIO_CON
LUMINANCE
1
GND
2
AUDIO
3
VIDEO
4
NC
5
J2
MONITOR_CON
J8:12
J5:TRIGGER
J6:TRIGGER
J5:GND
J5:+5V
J5:A_POT
J5:B_POT
J6:A_POT
J6:B_POT
J6:GND
J6:+5V
J1:DATA_IN
J1:CLOCK_IN
J1:DATA_OUT
J1:CLOCK_OUT
J1:SIO_AUDIO_IN
J1:MOT_CTRL
J1:+5V
J5:RIGHT
J5:LEFT
J5:BACK
J5:FWD
J6:RIGHT
J6:LEFT
J4:_CCTL
J6:BACK
J6:FWD
J1:COMMAND
J1:INTERRU
J1:PROCEED
AUDIO_OUT
J2:VIDEO
J2:LUMIN
J8:24 J8:18
RW
PHI2
PHI2
+5V_A
J8:19
GND
J8:S2 J8:S1 J8:S0
+5V_A
J8:_RST_SW
J8:_KR2
J8:5
GND
J4:_S4
J4:_S5
J4:RD5
J4:RD4
J8:3 J8:8 J8:2 J8:7 J8:4 J8:1
PB_EXTSEL CAS WRT RAS PB_RDY PB_EXTEN_B REF PB_MPD PB_AUDIO_IN RST IRQ
J8:6
J8:13 J8:11 J8:14 J8:10 J8:16 J8:15 J8:17
A0
A[0..15]
D7 D6
D0
D5 A15 D4 A14 A13 A12 A11 D3 A10 A9 A8
D[0..7]
D2 A7 A6 A5 D0 D1
A1
A4
A2
A3
A3
A4
A5
A6
A0 A1
A7
A2
D7
D6
D5
A8
A9
A10
A11
A12
D4
D3
D2
D1
Notes for domestic units only (NTSC)
1. Change modulator UM1662 (C061658) to modulator UM1652 (CA061619).
2. Change Y1 crystal, C015510, 3.546894MHz to C061090, 3.579545 MHz.
3. Delete all these components.
4. Add jumper W2 for domestic.

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: 2/11
Title: Atari 800XL Schematics
File: power.sch
Sheet: /POWER/
ezContents
Schematics based on Atari 800 XL Service Manual
Includes fixes
Schematics tested on real hardware
C6
1nF
C5
1nF C8 1nF C11 10nF
PWR_FLAG
PWR_FLAG
PWR_FLAG
PWR_FLAG
1 2
S1
POWER SWITCH
L3
L2
L1 GNDGND
GND
C51
100nF
C50
10µF
C3
22µF C7 10nF
C4
100nF
L5
820µH
GNDGNDGND
C15
1nF
C13
100nF
C10
22µF
L4
820µH
GNDGND
C2
22F
C1
470F
C9
1nF C12 1nF C14 1nF
GND
+5V +5V_A
+5V_B
+5V_C
+5V_D
+5V_A +5V_B
+5V_COMB +5V_COMB
Note: On the PCB Nets A and B are connected

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: 3/11
Title: Atari 800XL Schematics
File: audio.sch
Sheet: /AUDIO/
ezContents
Schematics based on Atari 800 XL Service Manual
Includes fixes
Schematics tested on real hardware
R1
2.2K R2
2K
GND
C16
100nF
GND
C20
4.7µF R7
2K
C110
1nF
GND
R4
56K
+
5
-
67
U1B
LM358
4 8
C21
1nF
C19
4.7µF
GND
C24
10µF
GND
GND
R80
1K
C22
4.7µF
R3
6.2K
GND
R10
1K
R8
5.1K
GND
C17
47nF
1
-
2
+
3
U1A
LM358
R5
470K
R6
68K
C112
1nF
C23
47nF
GND
R9
3.3K
R11
2.2K
RF_MOD_AUDIO
+5V_D
+5V_D
PB_AUDIO_IN
AUDIO_OUT
J1:SIO_AUDIO_IN
POKEY_AUD
GTIA_S3
+5V_A

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: 4/11
Title: Atari 800XL Schematics
File: video_processing.sch
Sheet: /VIDEO_PROCESSING/
ezContents
Schematics based on Atari 800 XL Service Manual
Includes fixes
Schematics tested on real hardware
67
U20C
4050
W2
GND
11 12
U20E
4050
GND
45
U20B
4050 Y1
3.546894MHz
23
U20A
4050
14 15
U20F
4050
C109
100nF
R114
1.5K
R112
100
VCC
1VSS 8
U20G
4050
R110
220
R111
27
GND
R113
470
R47
36K
R48
18K
R49
9.1K
R50
4.7K
CR4
1N4148
R109
100
R51
750
1
2
3
Q9
2N3906
1
2
3
Q8
2N3906
GND
L8
1.5µH
C61
100nF
C111
820pF
R73
4.7K
C60
56pF
C59
22pF
Y2 4.433618MHz
GND
R70
10K
R71
470
R69
6.8K
R72
1K
1
2
3
Q6
2N3904
GND
R46
1.6K
R67
75
C58
100nF
R116
51
1
2
3
Q3
2N3904
R52
2K
VCC 14
GND
7U21C
74LS74
S10
C
11 D
12
R
13
Q8
Q9
U21B 74LS74
R
1
D
2
C
3
S4
Q5
Q6
U21A 74LS74
L7
BEAD
L9
BEAD
R55
75
L6
100µH
C55
100pF
C54
1nF
1
2
3
Q5
2N3904
R97
1K
R64
10K
GND
1
2
3
Q4
2N3904
R68
3K
R66
100
R65
240
R53
100
R56
75
R54
1.2K
R63
4.7K
R62
3.3K
C53
3.9pF
R59
2.2K
GND
R61
1K
1
2
3
Q2
2N3904
R60
1K
R58
6.2K
C52
100pF
RF_MOD_VDO
+5V_D
COLOR
LUM[0..3]
CSYNC
+5V_A
OSC
PAL
+5V_A
J2:LUMIN
+5V_A
J2:VIDEO
+5V_D
+5V_A
LUM3
LUM2
LUM1
LUM0
Note 4
Note 3
Note 2
Notes for domestic units only (NTSC)
1. Change modulator UM1662 (C061658) to modulator UM1652 (CA061619).
2. Change Y1 crystal, C015510, 3.546894MHz to C061090, 3.579545 MHz.
3. Delete all these components.
4. Add jumper W2 for domestic.
MONITOR_CON MONITOR_CON

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: 5/11
Title: Atari 800XL Schematics
File: cpu_gpu.sch
Sheet: /CPU-GPU/
ezContents
Schematics based on Atari 800 XL Service Manual
Includes fixes
Schematics tested on real hardware
R31
3K
R19
3K
C30
100nF
GND
C42
100nF
S2 14
A1
1
T2 10
T3 11
S0 12
S1 13
S3 15
PAL 16
CAD3 17
AN0
18
AN1
19
A0
2
AN2
20
COLOR 21
LUM1 22
LUM2 23
LUM3 24
CSYNC 25
HALT
26
VCC 27
OSC 28
F0
29
VSS 3
2
30
LUM0 31
CS
32
R/W 33
D7
34
D6
35
D5
36
D4
37
A4
38
A3
39
D3
4
A2
40
D2
5
D1
6
D0
7
T0 8
T1 9
U17
GTIA
R/W 14
VSS 1
A3
10
A2
11
A1
12
A0
13
RDY 15
A10
16
A12
17 A13
18 A14
19
AN0 2
A15
20
VCC 21
A11
22
A9
23
A8
24
A7
25
A6
26
A5
27
A4
28
2
29
AN1 3
D0 30
D1 31
D2 32
D3 33
034
F0 35
RST 36
D7 37
D6 38
D5 39
LP 4
D4 40
AN2 5
RNMI
6
NMI
7
REF
8
HALT 9
U7
ANTIC
C48
100nF
1
2
3
R38
500K
GND
C97
1nF
1
23
U18A
74LS08
GND
VCC 14 GND
7
U18E
74LS08
GND
11
12
13
U18D
74LS08
C43
100nF
GND
R34 3K
L30 10µH
L23 10µH
C96
1nF
R133 220
R132 220
R136 470
R135 470
R134 470
R45
1K
R44
1K
R43
1K
R42
1K
R41
1K
GND
C47
1nF
R37
1K
C46
1nF
CR3
1N4148
CR2
1N4148
C45
220pF
R36
680
R35
33K
1
2
3
Q1
2N3904
C44
68pF
4
56
U18B
74LS08
GND
C31
100nF
R22
3K
R20
3K R21 3K VSS 1
A1
10 A2
11 A3
12 A4
13 A5
14 A6
15 A7
16 A8
17 A9
18 A10
19
RDY 2
A11
20
VSS 21
A12
22 A13
23 A14
24 A15
25
D7 26
D6 27
D5 28
D4 29
13
D3 30
D2 31
D1 32
D0 33
HALT 35
R/W 36
037
SO 38
2
39 IRQ
4
RES 40
NMI
6
SYNC 7
VCC
8
A0
9
U8
6502C_SALLY
R33
3K
D[0..7]
A[0..15]
PHI2
+5V_A
+5V_A
+5V_B
+5V_A
+5V_A
+5V_A
GTIA_S3
COLOR
CSYNC
LUM[0..3]
+5V_A
PAL
OSC
+5V_A
GTIA_CS
IRQ
RST
REF
PB_RDY
T3_GTIA
PHI2_SALLY
RW
+5V_B
J5:TRIGGER
J6:TRIGGER
J8:S2
J8:S1
J8:S0
+5V_A
+5V_A
A12
D3A2
A1
A0
A5
A15
D7
A0
A1
A2
A3
A4
A5
D6
A6
D5
A7
A8
D4
A9
A10
A11
A12
D3
A13
D2
A14
D1
A15
D0
A14
A6
LUM[0..3]
A4
A7
D0
D1
D7
D6
D5
D4
D3
A13
D2
A11
A10
D1
A9
A8
A4
A3
A2
A1
A0
D7
D6
D5
D0
D4A3
LUM0
D2
LUM3
LUM2
LUM1

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: 6/11
Title: Atari 800XL Schematics
File: mmu_roms.sch
Sheet: /MMU_ROMS/
ezContents
Schematics based on Atari 800 XL Service Manual
Includes fixes
Schematics tested on real hardware
R15
3K
R23
10K
R24
10K
R30
10K
R29
10K
R28
10K
GND
R27
10K
R26
10K
R25
10K
C27
100nF
C28
100nF
R12
3K
C26 100nF
R14
1K
R13
1K
C25
100nF
D4 14
D7 17
A11
18 A10
19
CS
20
A12
21
A9
22 A8
23
VCC 24
A7
1D1 10
D2 11
VSS 12
D3 13
D5 15
D6 16
A6
2A5
3A4
4A3
5A2
6A1
7A0
8
D0 9
U4
BASIC_ROM
VPP
1
A12
2
A7
3A6
4A5
5A4
6A3
7A2
8A1
9A0
10
CE
20
D0 11
A10
21
D1 12
OE
22
D2 13
A11
23
GND
14
A9
24
D3 15
A8
25
D4 16
A13
26
D5 17
PGM
27
D6 18
VCC 28
D7 19
U5
27128
MPD 14
I/O 17
BE 18
S4
19
VCC
20
A11 1
VSS
10
REF
11
S5
12 BASIC 13
OS 15
CI 16
A12 2
A13 3
A14 4
A15 5
MAP
6
RD4
7RD5
8
REN
9
U3
MMU
A0
1
O5 10
O4 11
O3 12
O2 13
O1 14
O0 15
VCC 16
A1
2
A2
3
E1
4E2
5E3
6
O7 7
GND
8
O6 9
U2
74LS138
GND
GND
GND
GND
A[0..15]
D[0..7]
+5V_B
+5V_A
J4:_S4
J4:_S5
J4:RD5
J4:RD4
+5V_A
+5V_A
+5V_A
PB_EXTEN_B
+5V_B
PIA_PB7
PIA_PB1
PIA_PB0
GTIA_CS
POKEY_CS
PIA_CS
PB_MPD
REF
MMU_CI
T3_GTIA
+5V_A
+5V_A
J4:_CCTL
D3
D2
D1
D0
D2
D1
D0
A8
D7A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
D6
A1
A8
A0
A9
A13
A10
A12
D5
A11
A15
A10
A9 D4
A14
D5
A7
A6
A5
D6
A4
A13
D7
D3
D4
D5
D6
D7
D0
D1
D2
D3
A12
A11
D4
A0
A1
A3
A2

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: 7/11
Title: Atari 800XL Schematics
File: control.sch
Sheet: /CONTROL/
ezContents
Schematics based on Atari 800 XL Service Manual
Includes fixes
Schematics tested on real hardware
R16
3K
C108
100nF
C106
100nF
VCC 14 GND
7
U19G
74LS14
C105
100nF
R106
3K
1 2
U19A
74LS14
3 4
U19B
74LS14
1213 U19F
74LS14
VCC 14 GND
7
U30C
74LS51
2
3
4
5
6
U30B
74LS51
1
10
11
12
13 8
9
U30A
74LS51
10 8
9
U18C
74LS08
R105
33
R104
33
R103
33
R102
33
R101
33
R100
33
R99
33
R98
33
VCC
14
IN
1
260 10
25 12
190 4
315 6
VSS
7440 8
U29
DELAY_LINE
C107
100nF
C29
100nF
C32
100nF
D0
1
Q2 10
Q2 11
E23
12
Q3 13
Q3 14
D3
15
VCC 16
Q0 2
Q0 3
E01
4
Q1 5
Q1 6
D1
7
GND
8
D2
9
U28
74LS375
S
1
I1d
10 I0d
11
Zc 12
I1c
13 I0c
14
E
15
VCC 16
I0a
2
I1a
3Za 4
I0b
5
I1b
6Zb 7
GND
8
Zd 9
U27
74LS158
S
1
I1d
10 I0d
11
Zc 12
I1c
13 I0c
14
E
15
VCC 16
I0a
2
I1a
3Za 4
I0b
5
I1b
6Zb 7
GND
8
Zd 9
U26
74LS158
GND
GND
GNDGND
GND
GND
GND
GND
MA[0..7]
A[0..15]
+5V_B
+5V_B
+5V_B
+5V_B
+5V_B
+5V_B
MMU_CI
RAS
WRT
+5V_B
CAS
PB_EXTSEL
PHI2_SALLY
+5V_B
RW
MA3
MA5
MA4
A8
MA2
A1
MA6
A9
MA7
MA1
A2
MA0
A12
A10
A3
A11
A14
A6
A4
A13
A5
A7
A0
A15

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: 8/11
Title: Atari 800XL Schematics
File: memory.sch
Sheet: /MEMORY/
ezContents
Schematics based on Atari 800 XL Service Manual
Includes fixes
Schematics tested on real hardware
DO 14
RFSH
1
A5
10 A4
11 A3
12
A6
13
CAS
15
VSS 16
DI 2
WRT
3RAS
4
A0
5
A2
6A1
7
VCC 8
A7
9
U9
4264_DRAM
C34 100nF
R143 100 R142 100
GND
R141 100 R140 100
DO 14
RFSH
1
A5
10 A4
11 A3
12
A6
13
CAS
15
VSS 16
DI 2
WRT
3RAS
4
A0
5
A2
6A1
7
VCC 8
A7
9
U10
4264_DRAM
C35 100nF
R147 100 R146 100
GND
R145 100 R144 100
DO 14
RFSH
1
A5
10 A4
11 A3
12
A6
13
CAS
15
VSS 16
DI 2
WRT
3RAS
4
A0
5
A2
6A1
7
VCC 8
A7
9
U11
4264_DRAM
C36 100nF
R107 33
R32
3K
GND
R108 33
GND
DO 14
RFSH
1
A5
10 A4
11 A3
12
A6
13
CAS
15
VSS 16
DI 2
WRT
3RAS
4
A0
5
A2
6A1
7
VCC 8
A7
9
U12
4264_DRAM
C37 100nFC38 100nF
DO 14
RFSH
1
A5
10 A4
11 A3
12
A6
13
CAS
15
VSS 16
DI 2
WRT
3RAS
4
A0
5
A2
6A1
7
VCC 8
A7
9
U13
4264_DRAM
GND
GND
C39 100nF
DO 14
RFSH
1
A5
10 A4
11 A3
12
A6
13
CAS
15
VSS 16
DI 2
WRT
3RAS
4
A0
5
A2
6A1
7
VCC 8
A7
9
U16
4264_DRAM
DO 14
RFSH
1
A5
10 A4
11 A3
12
A6
13
CAS
15
VSS 16
DI 2
WRT
3RAS
4
A0
5
A2
6A1
7
VCC 8
A7
9
U14
4264_DRAM
GND
C40 100nF
DO 14
RFSH
1
A5
10 A4
11 A3
12
A6
13
CAS
15
VSS 16
DI 2
WRT
3RAS
4
A0
5
A2
6A1
7
VCC 8
A7
9
U15
4264_DRAM
GND
C41 100nF
MA[0..7]
D[0..7]
+5V_A
+5V_B
CAS
RAS
WRT
MA4
MA5
MA6
MA7
MA3
MA4
MA5
MA3
MA2
D7 D6 D5
MA1
MA0
MA6
MA7
MA2
MA1
MA0MA0
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
D3D2D1D0
MA0
MA1
MA2
D4
MA1
MA3
MA6
MA4
MA7
MA6
MA5
MA4
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA5 MA5
MA3
MA6
MA2
MA7
MA1
MA0
MA2
MA3
MA4
MA7
MA6
MA5
MA4
MA7
MA3
MA0
MA1
MA2

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)

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: 10/11
Title: Atari 800XL Schematics
File: pokey.sch
Sheet: /POKEY/
ezContents
Schematics based on Atari 800 XL Service Manual
Includes fixes
Schematics tested on real hardware
R131 100
GND
GND
1 2 3 4 5 6 7 8
RN4
1 2 3 4 5 6 7 8
RN2
1 2 3 4 5 6 7 8
RN1
1 2 3 4 5 6 7 8
RN3
PWR_FLAG L12
GND
C102
1nF
C78 1nF C77 1nF C76 1nF C75 1nF
R84 4.7K
R83 4.7K
R82 4.7K
R81 4.7K
R130 100R129 100
R128 100
C74 1nF C73 1nF C72 1nF C71 1nF
C63
47nF C66 47nF
R79 1.8K
L16 10µH
L15 10µH
X4 1
B
10 A
11
X3 12
X0 13
X1 14
X2 15
VDD 16
X6 2
X
3
X7 4
X5 5
INH
6
VEE
7
VSS
8
C
9
U24
CD4051B
X4 1
B
10 A
11
X3 12
X0 13
X1 14
X2 15
VDD 16
X6 2
X
3
X7 4
X5 5
INH
6
VEE
7
VSS
8
C
9
U25
CD4051B
R78 1.8K
C65
47nF
C62
100nF
L25 10µH
C98
10µF
R77 1.8K L18 10µH
GND
L17 10µH
R76 1.8K
P0 14
VSS 1
P4 10
P5 11
P2 12
P3 13
P1 15
KR2 16
VCC 17
K5 18
K4 19 D3
2K3 20
K2 21
K1 22
K0 23
SID 24
KR1 25
BCLK 26
ACLK 27
SOD 28
IRQ
29
D4
3
CS0
30
CS1 31
R/W
32
A3
33 A2
34 A1
35 A0
36
AUD
37
D0
38
D1
39
D5
4
D2
40
D6
5
D7
6
2
7P6 8
P7 9
U22
POKEY
L24 10µH
R137
470
R96 47K
CR5 1N4148
GND
C70 100nF
C64
47nF
GND
R90 100
W1 R75 3K
R89
47K
C69
100nF GND
R74 3K
D[0..7]
A[0..15]
U25_15
J5:+5V
J5:GND
U25_14 U25_13
U24_4
J8:11 J8:14
J8:3 J8:8
U24_2 U24_5 U24_1
U24_12
+5V_A
U25_5
J5:A_POT
J5:B_POT
U24_15
J1:CLOCK_OUT
J1:DATA_OUT
J1:CLOCK_IN
J1:DATA_IN
U25_2
+5V_A
J6:A_POT
J6:B_POT
U24_14 U24_13
J6:GND
J8:16 J8:15 J8:12 J8:17 J8:10
U25_1
RW
U25_4
PHI2
J8:2
+5V_A
J8:7 J8:5 J8:4
J8:_KR2
J8:1 J8:6
U25_13
IRQ
J6:+5V
POKEY_CS
POKEY_AUD
U25_14
+5V_A
U25_15
U25_12
U25_1
U25_5
U25_2
+5V_A
U25_4
+5V_A
U25_12
U24_4
U24_2
U24_5
U24_1
U24_12
U24_15
U24_14
U24_13
J8:13
GND
D7
D6
D5
D4
D2
D1
D0
A3
A2
A1
A0
D3

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: 11/11
Title: Atari 800XL Schematics
File: rf_modulator.sch
Sheet: /RF_MODULATOR/
ezContents
Schematics based on Atari 800 XL Service Manual
Includes fixes
Schematics tested on real hardware
GND
1
23
S2
CH3CH4
GND
R.F.
TO
TV
VIDEO_IN 1
POWER 2
AUDIO_IN 3
CH_SEL 4
GND
5
RF_MODULATOR AUDIO_IN
VIDEO_IN
+5V_C
Note 1