Atari 800XL Wiring Diagram

1 2 3 4 5 6

A

B

C

J7

DIN-7_POWER

+5V_1
+5V_2
+5V_3

GND_3
GND_1
GND_2

SHIELD

+5V_A

GND

J4

CART_CON

A0
A1
A2
A3
A4
A5
A6
A7
A8

A9
A10
A11
A12

15

CCTL

R/W

B-PHI2

13

+5V

GND

S4

12

S5

14

RD5
RD4

10

D0

D1

D2

D3

D4

D5

11

D6

M

D7

1
4
6

7
3
5

2

5

A0

4

A1

3

A2

2

A3

C

A4

D

A5

E

A6
F
H

A8
J

A9
P

A10
N

A11
K

A12

J4:_CCTL

R

RW

S

PHI2

+5V_A

B

GND

1

J4:_S4
J4:_S5
J4:RD5

A

J4:RD4

9
8
L
6
7

Sheet: POWER

J8:15

J8:16

17

J8:17

1

2

1

2

J8:2

J8:1

334455667788KR2

J8:5

J8:3

J8:4

J8:6

J8:7

9

J8:8

J8:_KR2

AUDIO_OUT

J1:SIO_AUDIO_IN

J1:MOT_CTRL

J1:PROCEED

J1:INTERRU

J1:COMMAND

J1:CLOCK_OUT

J1:CLOCK_IN

J1:DATA_IN

J1:DATA_OUT

J5:TRIGGER

J6:TRIGGER

181819

S020S121S222RST_SW

+5V

File: power.sch

Sheet: RF_MODULATOR

File: rf_modulator.sch

C18
100nF
GND

D1
D2
D3
D4
D5
D6
D7

Sheet: CPU-GPU

File: cpu_gpu.sch

Sheet: MMU_ROMS

File: mmu_roms.sch

Sheet: CONTROL

File: control.sch

AUDIO_IN

VIDEO_IN

D[0..7]

A[0..15]

D[0..7]

A[0..15]

A[0..15]

MA[0..7]

D[0..7]

A[0..15]

Sheet: AUDIO

RF_MOD_AUDIO

File: audio.sch

Sheet: VIDEO_PROCESSING

RF_MOD_VDO

File: video_processing.sch

Sheet: MEMORY

D[0..7]

MA[0..7]

File: memory.sch

J8

KEYBOARD_CON

24

19

24

J8:24

J8:18

J8:19

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.

J8:S0

J8:S1

101011111212131314141515161617

23

J8:11

J8:10

J8:S2

J8:_RST_SW

Sheet: PER_INTERFACE

D[0..7]

A[0..15]

File: per_interface.sch

Sheet: POKEY

D[0..7]

A[0..15]

File: pokey.sch

J8:12

J8:13

J8:14

MONITOR_CON

J2:LUMIN
J2:VIDEO

GND

J1:+5V

CONTROL_CON

J5:FWD

J5:BACK

J5:LEFT

J5:RIGHT

J5:B_POT

J5:+5V

J5:GND

J5:A_POT

CONTROL_CON

J6:FWD

J6:BACK

J6:LEFT

J6:RIGHT

J6:B_POT

J6:+5V

J6:GND

J6:A_POT

J2

1
4

3

5

2

J1

SIO_CON

11
12
10

8
4
6

9

13

7

2
1
3
5

J5

1
2
3
4
5
6
7
8
9

J6

1
2
3
4
5
6
7
8
9

LUMINANCE
VIDEO

AUDIO

NC

GND

SIO_AUDIO_IN
NC
+5V
MOT_CTRL
GND
GND

PROCEED
INTERRUPT
COMMAND

CLOCK_OUT
CLOCK_IN
DATA_IN
DATA_OUT

FWD
BACK
LEFT
RIGHT
B_POT
TRIGGER
+5V
GND
A_POT

FWD
BACK
LEFT
RIGHT
B_POT
TRIGGER
+5V
GND
A_POT

A

B

C

D

J9

PARALLEL_BUS

Schematics based on Atari 800 XL Service Manual
Includes fixes

D7

A5

A4

A3

A0

A1A7A2

3

4

5

9

13

A36A47A58A6

A711A812A9

A1014A1115A1216A1317A14

A0

A1

A2

D0

D1

18

20D021D122D223D324D425D526D627D728

A15

A15D4A14

A13

A12

A11D3A10

A9

A8

A7

A6

D6D0D5

D2

CAS

WRT

41

44

46

CAS

LR/W

RAS

36

RAS

PB_RDY

RDY

PHI2

PB_EXTEN_B

REF

31

38

40

43

REF

PHI2

EXTERN_B

PB_EXTSEL

PB_MPD

2

49

MPD

EXTSEL

PB_AUDIO_IN

RST

IRQ

33

34

35

IRQ

RST

AUDIO_IN

RESERVED

37

39

47

RESERVED

RESERVED

RESERVED

48

50

GND1GND

GND

RESERVED

10

19

29

30

32

GND

GND

GND

GND

42

GND

45

GND

1 2 3 4 5 6

Schematics implemented and tested on real hardware

ezContents

Sheet: /
File: Atari800XL.sch

Title: Atari 800XL Schematics

KiCad E.D.A. kicad (5.1.4-0-10_14)

Date: 2020-01-15

Rev: 2Size: A4
Id: 1/11

D

1 2 3 4 5 6

A

L5

820µH

S1

POWER SWITCH

+5V +5V_A

B

Note: On the PCB Nets A and B are connected

C

1 2

+5V_COMB +5V_COMB

+5V_A +5V_B

C3
22µF

C1

470F

C6
1nF

C2

22F

C4

100nF

GND

C7
10nF

820µH

L1

C5
1nF

L2

L4

L3

C8
1nF

C10

22µF

C9
1nF

GND

C11
10nF

C13
100nF

C12
1nF

GNDGND

GNDGNDGND

C14
1nF

C15
1nF

PWR_FLAG

C50

10µF

GNDGND

PWR_FLAG

PWR_FLAG

PWR_FLAG

C51
100nF

+5V_D

+5V_B

+5V_C

A

B

C

Schematics tested on real hardware
Includes fixes
Schematics based on Atari 800 XL Service Manual

ezContents

D

Sheet: /POWER/
File: power.sch

D

Title: Atari 800XL Schematics

1 2 3 4 5 6

KiCad E.D.A. kicad (5.1.4-0-10_14)

Date: 2020-01-15

Rev: 2Size: A4
Id: 2/11

1 2 3 4 5 6

A

J1:SIO_AUDIO_IN

PB_AUDIO_IN

+5V_D

C110

C112
1nF

GND

R7
2K

R9

3.3K

1nF

GND

C16
100nF

C22

4.7µF

GND

LM358

R4
56K

R80
1K

C17
47nF

U1B

6

-

5

+

+5V_A

4 8

GND

B

POKEY_AUD

C

R1

2.2K
R2

GND

R3

6.2K

2K

7

GND

C21
1nF

C19

4.7µF

C20

4.7µF

GND

+5V_D

R5

470K

R11

2.2K

C23

47nF

GND

GTIA_S3

R6

68K

U1A

LM358

2

-

3

+

C24
10µF

1

R8

5.1K

R10
1K

GND

RF_MOD_AUDIO

AUDIO_OUT

A

B

C

Schematics tested on real hardware
Includes fixes
Schematics based on Atari 800 XL Service Manual

ezContents

D

Sheet: /AUDIO/
File: audio.sch

D

Title: Atari 800XL Schematics

1 2 3 4 5 6

KiCad E.D.A. kicad (5.1.4-0-10_14)

Date: 2020-01-15

Rev: 2Size: A4
Id: 3/11

1 2 3 4 5 6

RF_MOD_VDO

A

B

C

LUM[0..3]

CSYNC

+5V_D

COLOR

PAL

OSC

LUM0
LUM1
LUM2
LUM3

U20G

VCC1VSS

4050

C52

100pF

U20C

4050

U20E

4050

11 12

U20B

4050

U20A

4050

U20F

4050

14 15

8

R58

6.2K

Q2

2N3904

2

R59

2.2K

67

45

23

GND

+5V_D

R60
1K

3

1

R61

1K

R47

36K

R48

18K

R49

9.1K

R50

4.7K

CR4

1N4148

C53

3.9pF

GND

R46

750

R62

3.3K

1.6K

R51

R64
10K

2N3904

2

R63

4.7K

2N3904

2K

Q4

R52

R111

27

J2:LUMIN

J2:VIDEO

R109

L6

R116

R53

3

1

R66

100

1nF

2N3904

100pF

1.2K

75

100µH

R54

R56

R67
75

R68

3K

C54

C55

R55

MONITOR_CON

MONITOR_CON

L9

Note 3

C58

BEAD

L7

BEAD

+5V_A

100nF

U21C

GND

14

7

VCC

GND

74LS74

U21A 74LS74

4

S

2

D

Q

3

C

Q

R

1

U21B 74LS74

10

S

12

D

Q

11

C

Q

R

13

5

6

9

8

75

W2

Note 4

51

Q3

3

2

1

100

GND

R97
1K

Q5

2

3

1

R65

240

100

3.546894MHz

Note 2

2N3904

GND

GND

Y1

Q6

2

R69

6.8K

2N3906

C60

56pF

Q8

1

2

3

R110
220

3

R70
10K

1

R71
470

Y2

C59

4.433618MHz

22pF

1.5µH

C111

820pF

R73

4.7K

R72

Q9

2N3906

1

2

3

R112
100

C109

100nF

1K

L8

+5V_A

C61

100nF

+5V_A

GND

GND

R113
470

R114

1.5K

+5V_A

A

B

C

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.

Schematics tested on real hardware
Includes fixes
Schematics based on Atari 800 XL Service Manual

ezContents

D

Sheet: /VIDEO_PROCESSING/
File: video_processing.sch

D

Title: Atari 800XL Schematics

KiCad E.D.A. kicad (5.1.4-0-10_14)

Date: 2020-01-15

1 2 3 4 5 6

Rev: 2Size: A4
Id: 4/11

1 2 3 4 5 6

GTIA_CS

U17

U7

6

A

REF

3K

R19

R20
3K

13

12

R22

3K

+5V_A

B

+5V_A

C

D

U18D

74LS08

R21
3K

IRQ

PHI2_SALLY

R31
3K

+5V_A

11

A[0..15]

A13
A12
A11
A10
A9
A8
A7
A6
A5
A4

A1
A0

A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0

A15
A14

20
19
18
17
22
16
23
24
25
26
27
28
10
11
12
13

8

29

7

+5V_A

8

6
4

39

25
24
23
22
20
19
18
17
16
15
14
13
12
11
10

9

U8

RNMI

A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0

REF
2
NMI

VCC

NMI
IRQ
2

A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0

ANTIC

C31

100nF

6502C_SALLY

VCC

VSS

R/W

RST

AN0
AN1
AN2

HALT

RDY

VSS

RDY

HALT

SYNC

R/W

RES

VSS

+5V_A

21

1

14
36
35

F0

2
3
5

37

D7

38

D6

39

D5

40

D4

33

D3

32

D2

31

D1

30

D0

9

34

0

4

LP

15

GND

1

2
35
37

0

7

36
40

3

1

26

D7

27

D6

28

D5

29

D4

30

D3

31

D2

32

D1

33

D0

21
38

SO

D7
D6
D5
D4
D3
D2
D1
D0

D7
D6
D5
D4
D3
D2
D1
D0

GND

C30
100nF

D[0..7]

GND

GND

RW

5

4

A4
A3
A2
A1
A0

D7
D6
D5
D4A3
D3A2
D2
D1
D0

7

U18B

74LS08

GND

32

38
39
40

1
2

29
18
19
20

34
35
36
37

4
5
6
7

26
30

CS

A4
A3
A2
A1
A0

F0
AN0
AN1
AN2

D7
D6
D5
D4
D3
D2
D1
D0

HALT
2

6

U18E

74LS08

C43

100nF

VCC

GTIA

14

VCC

VSS

LUM0
LUM1
LUM2
LUM3

CSYNC
COLOR

R/W

OSC

PAL

CAD3

C44

68pF

S3

S0
S1
S2
T0
T1
T2
T3

+5V_B

15

27

C42

3

31

LUM0

22

LUM1

23

LUM2

24

LUM3

25
21

12
13
14

8

9
10
11

33
28
16
17

R35
33K

2

+5V_A

R42

R41

1K

100nF

R36

680

3

Q1

2N3904

1

2

1

C45

220pF

GND

74LS08

U18A

1N4148

1K

R134 470

R135 470

R136 470

R132 220

R133 220

R33

3

3K

+5V_A

CR2

1N4148

CR3

R34 3K

C46
1nF

+5V_B

R37

1K

Schematics tested on real hardware
Includes fixes
Schematics based on Atari 800 XL Service Manual

ezContents

Sheet: /CPU-GPU/
File: cpu_gpu.sch

Title: Atari 800XL Schematics

KiCad E.D.A. kicad (5.1.4-0-10_14)

Date: 2020-01-15

R43

1K

+5V_A

R44
1K

C96
1nF

C47
1nF

GND

+5V_A

R45
1K

L30 10µH

L23 10µH

C97
1nF

1

R38
500K

3

GTIA_S3

A

LUM[0..3]

LUM[0..3]

CSYNC
COLOR

J8:S0

J8:S1

J8:S2

J6:TRIGGER

J5:TRIGGER

B

OSC

PAL

T3_GTIA

PB_RDY

RST

PHI2

C

2

C48
100nF

GND

D

Rev: 2Size: A4
Id: 5/11

1 2 3 4 5 6

1 2 3 4 5 6

D[0..7]

A

B

C

PIA_CS

POKEY_CS

GTIA_CS

A[0..15]

J4:_CCTL

PIA_PB1

T3_GTIA

PIA_PB0

REF
J4:_S4
J4:_S5

J4:RD5
J4:RD4

PIA_PB7

PB_MPD

MMU_CI

PB_EXTEN_B

R13

1K

R14

+5V_A

+5V_B

C26 100nF

1K

GND

GND

R12

U5

28

10

A0

+5V_B

U2

16

1

A8

A0

2

A9

A1

3

A10

A2

3K

6

E3

5

E2

4

E1

U3

9

REN

11

REF

19

S4

12

S5

8

RD5

7

RD4

20

VCC

10

VSS

6

MAP

VCC

74LS138

GND

8

BASIC

MMU

O0
O1
O2
O3
O4
O5
O6
O7

I/O
BE
OS

A11
A12
A13
A14
A15

MPD

CI

+5V_A

15
14
13
12
11
10

9
7

GND

17
18
15
13

1

A11

2

A12

3

A13

4

A14

5

A15

14
16

R15

3K

C25
100nF

+5V_A

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11

A0

9

A1

A1

8

A2

A2

7

A3

A3

6

A4

A4

5

A5

A5

4

A6

A6

3

A7

A7

25

A8

A8

24

A9 D4

A9

21

A10

A10

23

A11

A11

2

A12

A12

26

A13

A13

27

PGM

1

VPP

20

CE

22

OE

U4

8

A0

7

A1

6

A2

5

A3

4

A4

3

A5

2

A6

1

A7

23

A8

22

A9

19

A10

18

A11

21

A12

20

CS

D0

VCC

D1
D2
D3
D4
D5
D6
D7

27128

GND

14

VCC

VSS

D0
D1
D2
D3

BASIC_ROM

D4
D5
D6
D7

11

D0

12

D1

13

D2

15

D3

16

D4

17

D5

18

D6

19

D7

24

12

9

D0

10

D1

11

D2

13

D3

14

D4

15

D5

16

D6

17

D7A12

Schematics tested on real hardware
Includes fixes

GND

GND

+5V_A

C28
100nF

+5V_A

C27
100nF

+5V_A

R23
10K

D7

R24
10K

D6

R25
10K

D5

R26
10K

R27
10K

D3

R28
10K

D2

R29
10K

D1

R30
10K

D0

A

B

C

Schematics based on Atari 800 XL Service Manual

ezContents

D

Sheet: /MMU_ROMS/
File: mmu_roms.sch

D

Title: Atari 800XL Schematics

KiCad E.D.A. kicad (5.1.4-0-10_14)

Date: 2020-01-15

1 2 3 4 5 6

Rev: 2Size: A4
Id: 6/11

1 2 3 4 5 6

MMU_CI

PB_EXTSEL

C29

A0
A8

A1
A9

A2
A10

A3
A11

GND

A4
A12

A5
A13

A6
A14

A7
A15

GND

14
13

11
10

15

14
13

11
10

15

2
3

5
6

1

2
3

5
6

1

+5V_B

U26

I0a
I1a

I0b
I1b

I0c
I1c

I0d
I1d

S
E

+5V_B

U27

I0a
I1a

I0b
I1b

I0c
I1c

I0d
I1d

S
E

GND

16

8

16

8

GND

100nF

Za

VCC

Zb

Zc

74LS158

Zd

GND

C32

100nF

Za

VCC

Zb

Zc

74LS158

Zd

GND

4

7

12

9

4

7

12

9

R98

33

R99

33

R100

33

R101

33

R102

33

R103

33

R104

33

R105

33

MA0

MA1

MA2

MA3

MA4

MA5

MA6

MA7

A

B

A[0..15]

C

MA[0..7]

R16

3K

+5V_B

U18C

74LS08

10

9

U19F

74LS14

U19A

74LS14

1 2

U19G

74LS14

U19B

74LS14

7

C105

16

VCC

74LS375

GND

8

GND

DELAY_LINE

190

260

315

100nF

3

Q0

2

Q0

5

Q1

6

Q1

11

Q2

10

Q2

13

Q3

14

Q3

4

10

12

25

6

8

3 4

+5V_B

U28

1

D0

7

D1

8

1213

+5V_B

C107

100nF

GND

9

D2

15

D3

4

E01

12

E23

U29

1

IN

14

VCC

VSS7440

GND

+5V_B

C106

100nF

VCC

R106

3K

+5V_B

14

GNDGND

U30A

74LS51

1
12
13

9
10
11

U30B

74LS51

2

3

4

5

U30C

74LS51

7

GND

VCC

C108

100nF

8

6

+5V_B

A

14

WRT

B

CAS

RAS

C

RW

PHI2_SALLY

Schematics tested on real hardware
Includes fixes
Schematics based on Atari 800 XL Service Manual

ezContents

D

Sheet: /CONTROL/
File: control.sch

D

Title: Atari 800XL Schematics

KiCad E.D.A. kicad (5.1.4-0-10_14)

Date: 2020-01-15

1 2 3 4 5 6

Rev: 2Size: A4
Id: 7/11

1 2 3 4 5 6

D3D2D1D0

U10

A0
A1
A2
A3
A4
A5
A6
A7

RAS
WRT
CAS
RFSH

R141

DO

DI

VCC

4264_DRAM

VSS

100

14

2

8

C35 100nF

16

GND

MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7

5
7

6
12
11
10
13

9

4

3
15

1

R140

A

U9

5

MA0

A0

7

MA1

A1

6

MA2

A2

12

MA3

A3

11

MA4

A4

10

MA5

A5

13

MA6

A6

9

MA7

A7

4

RAS

3

WRT

15

CAS

1

RFSH

100

DO

DI

VCC

4264_DRAM

VSS

14

2

8

C34 100nF

16

GND

MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7

5
7

6
12
11
10
13

9

4

3
15

1

U11

A0
A1
A2
A3
A4
A5
A6
A7

RAS
WRT
CAS
RFSH

R142

100

DO

DI

VCC

4264_DRAM

VSS

14

2

8

C36 100nF

16

GND

MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7

5
7

6
12
11
10
13

9

4

3
15

1

U12

A0
A1
A2
A3
A4
A5
A6
A7

RAS
WRT
CAS
RFSH

R143

DO

DI

VCC

4264_DRAM

VSS

100

A

14

2

8

C37 100nFC38 100nF

16

GND

B

+5V_A

D[0..7]

MA[0..7]

5
7

MA1

6

MA2

12

MA3

11

MA4

10

MA5 MA5

13

MA6

9

MA7

C

+5V_B

3K

R32

CAS

R108 33

WRT

RAS

R107 33

4
3

15

1

D7 D6 D5

U16

A0
A1
A2
A3
A4
A5
A6
A7

RAS
WRT
CAS
RFSH

R147

100

DO

DI

VCC

4264_DRAM

VSS

14

2

8

C41 100nF

16

GND

MA0MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7

5
7

6
12
11
10
13

9

4

3
15

1

U15

A0
A1
A2
A3
A4
A5
A6
A7

RAS
WRT
CAS
RFSH

R146

DO

DI

VCC

4264_DRAM

VSS

100

14

2

8

C40 100nF

16

GND

MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7

U13

A0
A1
A2
A3
A4
A5
A6
A7

RAS
WRT
CAS
RFSH

D4

R144

DO

DI

VCC

4264_DRAM

VSS

100

14

2

8

16

GND

R145

100

U14

5

A0

7

A1

6

A2

12

A3

11

A4

10

A5

13

A6

9

A7

4

RAS

3

WRT

15

CAS

1

RFSH

DO

DI

VCC

4264_DRAM

VSS

14

2

8

C39 100nF

16

GND

MA0
MA1
MA2
MA3
MA4

MA6
MA7

5
7

6
12
11
10
13

9

4

3
15

1

B

C

Schematics tested on real hardware
Includes fixes
Schematics based on Atari 800 XL Service Manual

ezContents

D

Sheet: /MEMORY/
File: memory.sch

D

Title: Atari 800XL Schematics

KiCad E.D.A. kicad (5.1.4-0-10_14)

Date: 2020-01-15

1 2 3 4 5 6

Rev: 2Size: A4
Id: 8/11

1 2 3 4 5 6

L10

C82 1nF

10µH

L11

BEAD

R119 100

C83 1nF

C79

C80

22µF

1nF

GND

C84 1nF

C87 1nF

C86 1nF

C85 1nF

Keyboard connector (part)

Schematics tested on real hardware

C88 1nF

GND

C81
1nF

C89 1nF

+5V_A

L29 10µH
L28 10µH
L27 10µH
L26 10µH
L22 10µH
L21 10µH
L20 10µH
L19 10µH

C90 1nF

GND

+5V_A

R95
220

C94
10nF

GND

GND

C93
100nF

C95
10nF

J1:+5V

J1:MOT_CTRL

J1:PROCEED
J1:INTERRU
J1:COMMAND
J6:FWD
J6:BACK
J6:LEFT
J6:RIGHT
J5:FWD
J5:BACK
J5:LEFT
J5:RIGHT

D[0..7]

A[0..15]

J8:19

J8:18

J8:24

A

B

C

+5V_A

1

2

3

R94

4.7K

R118 220

R120 220

R122 220

R124 220

R126 220

Q7
MPSA55

R117 100

C91 1nF

A0
A1

R91

2.7K

R92

4.7K

R121 220

R123 220

R125 220

R127 220

D0
D1
D2
D3
D4
D5
D6
D7

R93

4.7K

C92 1nF

PIA_PB1

PIA_PB0

PIA_CS

PIA_PB7

Reset circuitry

+5V_A

+5V_A

+5V_A

RW

PHI2

IRQ

RST

C68

GND

R86

R88

R85

3K

U23

16

PB6

15

PB5

14

PB4

11

PB1

20

100nF

3K

3K

+5V_A

CR1

1N4148

C49

47µF

VCC

1

VSS

22

CS0

24

CS1

13

PB3

12

PB2

6520A_PIA

34

RST

10

PB0

23

CS2

21

R/W

25

2

37

IRQB

38

IRQA

17

PB7

R87

+5V_A

3K

R39
56K

R40
100

39

CA2

40

CA1

18

CB1

19

CB2

2

PA0

3

PA1

4

PA2

5

PA3

6

PA4

7

PA5

8

PA6

9

PA7

33

D0

32

D1

31

D2

30

D3

29

D4

28

D5

27

D6

26

D7

35

A0

36

A1

89

U19D

74LS14

1011

U19E

74LS14

A

B

C

Includes fixes

GND

D

J8:_RST_SW

L14
22µH

Schematics based on Atari 800 XL Service Manual

ezContents

Sheet: /PER_INTERFACE/
File: per_interface.sch

D

Title: Atari 800XL Schematics

KiCad E.D.A. kicad (5.1.4-0-10_14)

Date: 2020-01-15

1 2 3 4 5 6

Rev: 2Size: A4
Id: 9/11

1 2 3 4 5 6

+5V_A

L25 10µH

C76 1nF

C69

100nF

GND

RN3

1234567

J8:11

J8:13

U24_4

U24_2

RN1

1234567

J8:2

J8:4

U25_1

U25_15

L12

C78 1nF

C77 1nF

C102

J8:14

U25_13

GND

GND

U24_5

J8:6

1nF

1234567

8

J8:17

U24_12

J8:8

U25_5

J8:12

J8:10

U24_1

1234567

8

J8:3

J8:1

U25_2

+5V_A

J8:_KR2

J6:GND
J6:B_POT
J6:A_POT

J6:+5V

J5:B_POT
J5:A_POT

J5:+5V

J5:GND

J1:CLOCK_OUT

J1:CLOCK_IN
J1:DATA_IN

J1:DATA_OUT

U24_15

U25_14

J8:15

U25_4

U24_14

J8:5

RN4

U24_13

RN2

U25_12

8

J8:16

8

J8:7

A

B

C

R89

A[0..15]

A

D[0..7]

RW

PHI2

IRQ

POKEY_AUD

POKEY_CS

B

PWR_FLAG

C

+5V_A

A0
A1
A2
A3
D0
D1
D2
D3
D4
D5
D6
D7

U22

36

A0

35

A1

34

A2

33

A3

38

D0

39

D1

40

D2

2

D3

3

D4

4

D5

5

D6

6

D7

32

R/W

7

2

29

IRQ

37

AUD

30

CS0

R81 4.7K

R83 4.7K

K0
K1

K2
KR1
CS1

K3

K4

K5
KR2

P4

P5

P6

POKEY

P7

P1

P0

VCC

VSS

P3

P2

ACLK
BCLK

SID

SOD

R82 4.7K

R84 4.7K

23
22
21
25
31

20
19
18
16
10

11

8

9
15
14
17

1
13
12

27
26
24
28

W1 R75 3K

+5V_A

CR5 1N4148

R96 47K

C62
100nF

C63
47nF

R128 100

R130 100

R74 3K

R137
470

R76 1.8K

C64

47nF

R78 1.8K

C66

47nF

R129 100

R131 100

47K

+5V_A

R90 100

GND

R77 1.8K

C65
47nF

R79 1.8K

GND

GND

11

A

10

B

9

C

3

X

6

INH

+5V_A

GND

U25

11

A

10

B

9

C

3

X

6

INH

L24 10µH

L17 10µH

L18 10µH

C72 1nF

C71 1nF

16

VDD

13

X0

14

X1

15

X2

12

X3
X4
X5

CD4051B

X6
X7

VEE7VSS

8

U24

C70 100nF

16

VDD

13

X0

14

X1

15

X2

12

X3
X4
X5

CD4051B

X6
X7

VEE7VSS

8

10µF

C98

L15 10µH

L16 10µH

C74 1nF

C73 1nF

1
5
2
4

GND

1
5
2
4

U24_13
U24_14
U24_15
U24_12
U24_1
U24_5
U24_2
U24_4

U25_13
U25_14
U25_15
U25_12
U25_1
U25_5
U25_2
U25_4

C75 1nF

Schematics tested on real hardware
Includes fixes
Schematics based on Atari 800 XL Service Manual

ezContents

D

Sheet: /POKEY/
File: pokey.sch

D

Title: Atari 800XL Schematics

KiCad E.D.A. kicad (5.1.4-0-10_14)

Date: 2020-01-15

1 2 3 4 5 6

Rev: 2Size: A4
Id: 10/11

1 2 3 4 5 6

A

+5V_C

B

C

Note 1

R.F.

TO
TV

GND

2

POWER

GND

5

CH3CH4

123

S2

4

CH_SEL

RF_MODULATOR

GND

VIDEO_IN

AUDIO_IN

1

3

VIDEO_IN

AUDIO_IN

A

B

C

Schematics tested on real hardware
Includes fixes
Schematics based on Atari 800 XL Service Manual

ezContents

D

Sheet: /RF_MODULATOR/
File: rf_modulator.sch

D

Title: Atari 800XL Schematics

1 2 3 4 5 6

KiCad E.D.A. kicad (5.1.4-0-10_14)

Date: 2020-01-15

Rev: 2Size: A4
Id: 11/11