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LITTLE BOARD/386SX

AMPRO COMPUTERS, INC.

LITTLE BOARD/386SX

Processor

80386SX

Processor Speed

25MHz

Chip Set

Ampro

Max. onboard DRAM

16MB

Cache

None

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interface, parallel port, SCSI connector, serial ports (2)

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Power connector

J1

SCSI interface

J7

Serial port (COM2)

J2

Floppy drive interface

J8

Serial port (COM1)

J3

IDE interface

J11

Keyboard

J5

Power J1-1 to +12V BUS

W7

Parallel port

J6

   

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

SCSI controller enabled

W1

Closed

 

SCSI controller disabled

W1

Open

SCSI controller select IRQ3

W2 & W3

Closed

 

SCSI controller select none

W2 & W3

Open

Factory configured - do not alter

W4

Open

Factory configured - do not alter

W5

Open

SCSI termination power enabled

W6

Closed

 

SCSI termination power none

W6

Open

Floppy clock select 16MHz

W10

Closed

 

Floppy clock select none

W10

Open

Flash EPROM programming power +12V to Byte-wide

W16

Open

 

Flash EPROm programming power disabled

W16

Closed

Watchdog timer output selection

W17

Open

 

Watchdog timer output none

W17

Closed

Factory configured - do not alter

W18

Open

Floppy PCVAL selection

W19

Open

 

Floppy PCVAL none

W19

Closed

Factory configured - do not alter

W21

N/A

Factory configured - do not alter

W22

N/A

Power fail NMI enabled

W23

Open

 

Power fail NMI none

W23

Closed

Parallel port interrrupt option select via setup

W24

Open

 

Parallel port interrrupt option none

W24

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

512KB

(2) 256K x 9

NONE

1MB

(2) 256K x 9

(2) 256K x 9

2MB

(2) 1M x 9

(2) 256K x 9

4MB

(2) 1M x 9

(2) 1M x 9

8MB

(2) 4M x 9

NONE

10MB

(2) 1M x 9

(2) 4M x 9

16MB

(2) 4M x 9

(2) 4M x 9

EPROM CONFIGURATION (S0)

EPROM

W8

W9

W25

27C256

Open

pins 7 & 8, 10 & 11

pins 1 & 2

27C512

Open

pins 1 & 4, 7 & 8, 10 & 11

pins 1 & 2

27C010

Open

pins 1 & 4, 2 & 5, 6 & 9, 7 & 8

pins 1 & 2

27C020

Open

pins 1 & 4, 2 & 5, 6 & 9, 7 & 8, 11 & 12

pins 1 & 2

27C040

Open

pins 1 & 4, 2 & 3, 6 & 9, 7 & 8, 11 & 12

pins 1 & 2

27C080

Closed

pins 1 & 4, 2 & 3, 7 & 8, 11 & 12

pins 1 & 2

62256

Open

pins 4 & 7, 5 & 8, 10 & 11

pins 1 & 2 or 2 & 3

628128

Open

pins 1 & 2, 4 & 7, 5 & 8, 10 & 11

pins 1 & 2 or 2 & 3

uPD434000

Open

pins 1 & 2, 3 & 6, 4 & 7, 5 & 8, 11 & 12

pins 1 & 2 or 2 & 3

28F256

Open

pins 2 & 5, 6 & 9, 7 & 8

pins 1 & 2

28F512

Open

pins 1 & 4, 2 & 5, 6 & 9, 7 & 8

pins 1 & 2

28F010

Open

pins 1 & 4, 2 & 5, 6 & 9, 7 & 8

pins 1 & 2

28F020

Open

pins 1 & 4, 2 & 5, 6 & 9, 7 & 8, 11 & 12

pins 1 & 2

Note:Pins designated should be in the closed position.

EPROM/FLASH EPROM CONFIGURATION (S1 & S2)

EPROM

W12

W13

W14

W15

128KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

256KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed