MICRONICS MOTHERBOARD

80386SX-25 Cache 09-00140-xx(Baby size)

This document is for the baby-sized (13.3" x 8.5") 80386SX-25 caching motherboard.

It's identifying features are: an LED between expansion slots #5 and #6;

six 16-bit expansion slots; eight sockets for SIMMs (four banks of 2); a socket for

an 80387SX coprocessor.

The bus speed for this motherboard is fixed at 8MHz.

+=============================+

+ +

+ MOTHERBOARD JUMPER SETTINGS +

+ +

+=============================+

J6 COM2

J8 COM1

J9 Parallel port

J19 IDE interface

J20 Floppy interface

J21 Hard disk LED

W1 Monitor type

Not connected Monochrome video card

Pins 1-2 Color video card

W2 Reserved

Not connected

W3 Reserved

Not connected

W4 CMOS memory

Pins 1-2 Battery backed-up CMOS (default)

Pins 2-3 Clear CMOS memory

W5 Memory type

Pins 2-3 4Mx9 SIMMs installed

Pins 1-2 and 3-4 4Mx9 SIMMs not installed

W6 Reserved

Not connected

P2 Reset switch

Pin 1 - Signal

Pin 2 - Ground

P3 External speaker

Pin 1 - Speaker

Pin 2 - no connector

Pin 3 - Ground

Pin 4 - +5 volts DC

P4 Keylock / Power LED

Pin 1 - Power LED signal

Pin 2 - no connector

Pin 3 - Ground

Pin 4 - Keyboard lock signal

Pin 5 - Ground

+========================+

+ +

+ MEMORY CONFIGURATION +

+ +

+========================+

Listed below are the possible memory configurations

Size

in Bank Bank Bank Bank

MB 0 1 2 3

-----------------------------------

1.0 256K 256K

1.5 256K 256K 256K

2.0 256K 256K 256K 256K

3.0 256K 256K 1MB

4.0 1MB 1MB

6.0 1MB 1MB 1MB

8.0 1MB 1MB 1MB 1MB

9.0 256K 256K 4MB

10.0 1MB 4MB

16.0 4MB 4MB

256K = Two 256Kx9 SIMMs in the bank

1MB = Two 1Mx9 SIMMs in the bank

4MB = Two 4Mx9 SIMMs in the bank

This document is for the mini-sized (23.0cm x 21.5cm) 386SX-25 non-cached motherboard.

The part number for this board is 09-00140-xx.

It's identifying features are: an LED between expansion slots #5 and #6; six 16-bit

expansion slots, and two 8-bit expansion slots; eight sockets for SIMMs (four banks of 2);

a socket for a 80387SX coprocessor.

The bus speed for this motherboard is fixed at 8MHz.

+=============================+

+ +

+ MOTHERBOARD JUMPER SETTINGS +

+ +

+=============================+

Jumper J2 is used to configure the battery backup method. To use the on-board battery,

place a jumper block connecting pins 2-3. If you wish to connect an external battery,

pin 1 is the battery positive lead, and pin 4 is for battery negative.

You can clear the contents of the CMOS memory by placing a jumper block connecting

pins 3-4, then turning on the power. Turn off the power, configure the jumper for

either the on-board or external battery, and turn the power back on. The system

will act as if it has never been turned on before.

JP2 Video type

Pins 1-2 Color video card installed

Not connected Monochrome video card installed

+========================+

+ +

+ MEMORY CONFIGURATION +

+ +

+========================+

Listed below are the possible memory configurations

Size

in Bank Bank Bank Bank

MB 0 1 2 3

-----------------------------------

0.5 256K

1.0 256K 256K

1.5 256K 256K 256K

2.0 256K 256K 256K 256K

2.0 1MB

2.5 256K 1MB

3.0 256K 256K 1MB

4.0 1MB 1MB

4.5 256K 1MB

5.0 256K 1MB

6.0 1MB 1MB 1MB

8.0 1MB 1MB 1MB 1MB

8.0 4MB

8.5 256K 4MB

9.0 256K 256K 4MB

10.0 1MB 4MB

12.0 1MB 1MB 4MB

16.0 4MB 4MB

256K = Two 256Kx9 SIMMs in the bank

1MB = Two 1Mx9 SIMMs in the bank

4MB = Two 4Mx9 SIMMs in the bank