Date: May 1, 2014 Sheet 1 of 1

Size Document Number REVC C:\ORCAD\SHEET\Z80\ID4801.SCH A

TitleHeath ID-4801 EPROM Programmer

TMSI c/o Lee Hart

VCC

3

4 5

6

7

8 3

4

5

6

7

8

_BLK_ORG_RED

_BLK

GRN BLK

RS-232DRIVER

1

2

390RP13

3

41

2

390RP11

1

2390RP12

-15V

+15V

D11N4002

VCC

D

13

S0

1

S1

2

S2

3

G

14

CLR

15

Q0

4

Q1

5

Q2

6

Q3

7

Q4

9

Q5

10

Q6

11

Q7

12

U32

74LS259

16

8

C330.01

C350.01

C360.01

910

8U3C

74LS32

R22470

4

5 6U34B

1488

7 1

12

1311U34D

1488

9

10 8U34C

1488

2 3U34A1488

14

13

11

10

98721

314

V6MAN4640

12345678

P1RS-232

3

4

5

6

7

8 3

4

5

6

7

8 3

4

5

6

7

87

8

5

6

3

4 3

4

5

6

7

8 3

4

5

6

7

8 3

4

5

6

7

8 5

6

7

81

2390RP91

2

390RP8

1

2390RP71

2

390RP6

1

2390RP51

2

390RP4

1

2390RP3

VCC

D

13

S0

1

S1

2

S2

3

G

14

CLR

15

Q0

4

Q1

5

Q2

6

Q3

7

Q4

9

Q5

10

Q6

11

Q7

12

U27

74LS259

16

8

VCC VCC

D

13

S0

1

S1

2

S2

3

G

14

CLR

15

Q0

4

Q1

5

Q2

6

Q3

7

Q4

9

Q5

10

Q6

11

Q7

12

U28

74LS259

16

8D

13

S0

1

S1

2

S2

3

G

14

CLR

15

Q0

4

Q1

5

Q2

6

Q3

7

Q4

9

Q5

10

Q6

11

Q7

12

U29

74LS259

16

8

C290.01

C280.01

C310.01

VCC

D

13

S0

1

S1

2

S2

3

G

14

CLR

15

Q0

4

Q1

5

Q2

6

Q3

7

Q4

9

Q5

10

Q6

11

Q7

12

U31

74LS259

16

8

C320.01

13

11

10

98721

314

V5MAN4640

13

11

10

98721

314

V4MAN4640

13

11

10

98721

314

V3MAN4640

13

11

10

98721

314

V2MAN4640

3

4

5

6

7

87

8

5

6

3

4

DR0DR1DR2DR3DR4DR5DR6DR7

AR0AR1AR2AR3AR4AR5AR6AR7AR8AR9

AR10AR11AR12AR13AR14AR15

1

2390RP1 1

2

390RP2

AR0AR1AR2AR3AR4AR5AR6AR7AR8AR9AR10AR11

DR0DR1DR2DR3DR4DR5DR6DR7

/MRE

/TCE

DR0DR1DR2DR3DR4DR5 /TDE

/SDO/SIM/AOE/ALE

12

1311U3D74LS32

AR14

AR15

/MRE

VCC

C50.01uF

A0 8A1 7A2 6A3 5A4 4A5 3A6 2A7 1A8 23A9 22A10 19A11 21

CE 18OE/VPP 20

O0 9O1 10O2 11O3 13O4 14O5 15O6 16O7 17

U22732

24

12

VCC

D

13

S0

1

S1

2

S2

3

G

14

CLR

15

Q0

4

Q1

5

Q2

6

Q3

7

Q4

9

Q5

10

Q6

11

Q7

12

U26

74LS259

16

8

D0 3D1 4D2 7D3 8D4 13D5 14D6 17D7 18

OC 1CLK 11

Q0 2Q1 5Q2 6Q3 9Q4 12Q5 15Q6 16Q7 19

U2274LS374

2010

C270.01

13

11

10

98721

314

V1MAN4640

0000-3FFFh

/IORQR2470

R36800

VCC

R4680

VCC

VCC

1 2

U19A74LS04

VCC

C20.01uF

3 4

U19B74LS04

VCCVCC VCC

3 4

U21B74LS04

D 2CLK 3

Q 5

Q 6

PR 4

CL 1

U5A74LS74

R710K

/MWE

A0 30A1 31A2 32A3 33A4 34A5 35A6 36A7 37A8 38A9 39A10 40A11 1A12 2A13 3A14 4A15 5

D0 14D1 15D2 12D3 8D4 7D5 9D6 10D7 13

M1 27

MREQ 19IORQ 20

WR 22RD 21

RFSH 28

HALT 18

WAIT 24INT 16NMI 17

RESET 26

BUSRQ 25

BUSAK 23

CLK 6

GND 29

VCC 11

U1Z80 CPU

4

5 6U3B74LS32

R610K

C310uF

/MREQ

C10.01

S2LOAD

R810K

C40.01uF

C210.01

S1FUNCTION

R18200

VCC

13 12

U19F74LS04

14

7

C80.01

R5330

C5322uF

Y14MHz

HC6UH

D7D6D5D4D3D2D1D0

/MRE

/SIM 1

2 3U17A74LS32

A10

A0A1A2A3A4A5A6A7A8A9/MRE

DR7DR6DR5DR4DR3DR2DR1DR0

A0A1 /MRE/MWE

AR0AR1

AR0AR7 1

2 3U23A74LS32

/IORQ

11 10U21E

74LS04

/DOE

A0 8A1 7A2 6A3 5A4 4A5 3A6 2A7 1A8 23A9 22A10 19

CE 18OE 20WE 21

D0 9D1 10D2 11D3 13D4 14D5 15D6 16D7 17

U8HM6116

24

12

VCCC7

0.01uF

D0 3D1 4D2 7D3 8D4 13D5 14D6 17D7 18

OC 1G 11

Q0 2Q1 5Q2 6Q3 9Q4 12Q5 15Q6 16Q7 19

U674LS373

2010

VCC 4

5 6U17B74LS32

14

7

VCC

C60.01

1

2 3 U3A74LS32

14

7

A1 2A2 3A3 4A4 5A5 6A6 7A7 8A8 9

G 19DIR 1

B1 18B2 17B3 16B4 15B5 14B6 13B7 12B8 11

U474LS245

2010

A10A11A12

A0A1A2A3A4A5A6A7A8A9

D7D6D5D4D3D2D1D0

A10

A0A1A2A3A4A5A6A7A8A9

D7D6D5D4D3D2D1D0

/MRE/MWE

DR7 /DOEDR6 VPPE

4

5 6U23B74LS32

A0 10A1 9A2 8A3 7A4 6A5 5A6 4A7 3A8 25A9 24A10 21A11 23A12 2

CS1 20CS2 26WE 27OE 22

D0 11D1 12D2 13D3 15D4 16D5 17D6 18D7 19

U13HM6264

28

14

VCC VCC

C14.01

C12.01

VCC

1 2

U21A74LS04

C230.01

A0 8A1 7A2 6A3 5A4 4A5 3A6 2A7 1A8 23A9 22A10 19

CE 18OE 20WE 21

D0 9D1 10D2 11D3 13D4 14D5 15D6 16D7 17

U11HM6116

24

12