4.11 PC/104 Bus Connectors

The PC/104 bus is essentially identical to the ISA Bus except for the physical design. It specifies two pin and socket connectors for the bus signals. A 64-pin header J1 incorporates the 62-pin 8- bit bus connector signals, and a 40-pin header J2 incorporates the 36-pin 16-bit bus connector signals. The additional pins on the PC/104 connectors are used as ground or key pins. The female sockets on the top of the board enable stacking another PC/104 board on top of the board, while the male pins on the bottom enable the board to plug into another board below it.

In the pinout figures below, the tops correspond to the left edge of the connector when the board is viewed from the primary side (side with the CPU chip and the female end of the PC/104 connector) and the board is oriented so that the PC/104 connectors are along the bottom edge of the board.

View from Top of Board

J2: PC/104 16-bit bus connector

J1: PC/104 8-bit bus connector

Ground

 

 

Ground

IOCHCHK-

 

 

Ground

D0

C0

A1

B1

MEMCS16-

D1

C1

SBHE-

SD7

A2

B2

RESET

IOCS16-

D2

C2

LA23

SD6

A3

B3

+5V

IRQ10

D3

C3

LA22

SD5

A4

B4

IRQ9

IRQ11

D4

C4

LA21

SD4

A5

B5

-5V

IRQ12

D5

C5

LA20

SD3

A6

B6

DRQ2

IRQ15

D6

C6

LA19

SD2

A7

B7

-12V

IRQ14

D7

C7

LA18

SD1

A8

B8

0WS-

DACK0-

D8

C8

LA17

SD0

A9

B9

+12V

DRQ0

D9

C9

MEMR-

IOCHRDY

A10

B10

Key (pin cut)

DACK5-

D10

C10

MEMW-

AEN

A11

B11

SMEMW-

DRQ5

D11

C11

SD8

SA19

A12

B12

SMEMR-

DACK6-

D12

C12

SD9

SA18

A13

B13

IOW-

DRQ6

D13

C13

SD10

SA17

A14

B14

IOR-

DACK7-

D14

C14

SD11

SA16

A15

B15

DACK3-

DRQ7

D15

C15

SD12

SA15

A16

B16

DRQ3

+5V

D16

C16

SD13

SA14

A17

B17

DACK1-

MASTER-

D17

C17

SD14

SA13

A18

B18

DRQ1

Ground

D18

C18

SD15

SA12

A19

B19

Refresh-

Ground

D19

C19

Key (pin cut)

SA11

A20

B20

SYSCLK

 

 

 

 

SA10

A21

B21

IRQ7

 

 

 

 

SA9

A22

B22

IRQ6

 

 

 

 

SA8

A23

B23

IRQ5

 

 

 

 

SA7

A24

B24

IRQ4

 

 

 

 

SA6

A25

B25

IRQ3

 

 

 

 

SA5

A26

B26

DACK2-

 

 

 

 

SA4

A27

B27

TC

 

 

 

 

SA3

A28

B28

BALE

 

 

 

 

SA2

A29

B29

+5V

 

 

 

 

SA1

A30

B30

OSC

 

 

 

 

SA0

A31

B31

Ground

 

 

 

 

Ground

A32

B32

Ground

Prometheus CPU User Manual V1.44

Page 15

Page 15
Image 15
Diamond Systems PR-Z32-E-ST 11 PC/104 Bus Connectors, J2 PC/104 16-bit bus connector J1 PC/104 8-bit bus connector

PR-Z32-E-ST, PR-Z32-EA-ST specifications

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