MICRONICS MOTHERBOARD

80386-25 and 33 Cache (Baby size)

09-00035-xx is 25MHZ 09-00066 is 33MHZ

This document is for the baby-sized (13.3" x 8.5") 80386-25 and 80386-33 caching motherboard.

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

eight 16-bit expansion slots; four sockets for SIMMs (one bank of 4); a socket for

an 80387 coprocessor.

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

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

+ +

+ MOTHERBOARD SWITCH SETTINGS +

+ +

+ * = Default setting +

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

1 Reserved *On

2 80387 Coprocessor installed On

80387 Coprocessor not installed *Off

3 Bus speed selection (see below)

4 Bios relocation enabled *On

Bios relocation disabled Off

5 Reserved *Off

6 Color video adapter *On

Monochrome video adapter Off

7 Cache enabled *On

Cache disabled Off

8 Bus speed selection (see below)

Bus speed selection

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

Switch settings -- * = default

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

Board SW1.3=OFF SW1.3=ON SW1.3=ON SW1.3=OFF

Speed SW1.8=OFF SW1.8=OFF SW1.8=ON SW1.8=ON

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

25MHz 6.25 Mhz 8.33 Mhz* 12.5 Mhz Undefined

33MHz 8.33 Mhz* 11.33 Mhz 16.66 Mhz Undefined

WARNING! Many cards are not able to run at a faster bus speed.

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

+ +

+ MOTHERBOARD JUMPER SETTINGS +

+ +

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

J5 Keylock / Power LED

Pin 1 - Power LED signal

Pin 2 - no connector

Pin 3 - Ground

Pin 4 - Keyboard lock signal

Pin 5 - Ground

J6 External keyboard connector

Pin 1 - Keyboard clock

Pin 2 - Keyboard data

Pin 3 - no connector

Pin 4 - Ground

Pin 5 - +5 volts DC

J8 External speaker

Pin 1 - Speaker

Pin 2 - no connector

Pin 3 - Ground

Pin 4 - +5 volts DC

J9 External 6-volt battery connector

Pin 1 - Battery Positive

Pin 2 - no connector

Pin 3 - Ground

Pin 4 - Ground

W1 Reset switch

Pin 1 - Signal

Pin 2 - Ground

W4 Turbo LED

Pin 1 - Signal

Pin 2 - Ground

W5 Turbo switch

Pin 1 - Signal

Pin 2 - Ground

W9 Non-cacheable region

Pin 1-2 D00000-DFFFFF

No connection E00000-EFFFFF

W14 Cache configuration

Pin 1-2 Direct map (32KB)

No connection Two-way set associative (64KB)

W15 Cache configuration

Pin 1-2 Direct map (32KB)

Pin 2-3 Two-way set associative (64KB)

W98 Memory configuration

Pin 1-2 Four 1Mx9 SIMMs installed

Pin 2-3 Four 256Kx9 SIMMs installed

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

+ +

+ MEMORY CARDS +

+ +

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

M710 memory card:

=================

This memory card may be used on this motherboard to allow up to 12MB to be added to

the memory already installed on the motherboard. There are sixteen (16) SIMM sockets

on the memory card (four banks of 4 sockets). The first two banks of memory can

accept 256Kx9 SIMMs, or 1Mx9 SIMMs. The second two banks of memory can only accept

1Mx9 SIMMs. The four banks of memory are numbered zero, one, two, and three. Bank

zero on the M710 uses the same addresses as bank zero on the motherboard (the four

sockets on the motherboard). Therefore, if the motherboard memory sockets are

populated, bank zero on the M710 must be left empty (or that memory will not be

recognized).

There are four jumpers on the M710, which configures the type of memory installed in

each of the four banks of memory. They are set as follows:

W1 Pin 1-2 Four 1Mx9 SIMMs in bank 0 (or when empty)

Pin 2-3 Four 256Kx9 SIMMs in bank 0

W2 Pin 1-2 Four 1Mx9 SIMMs in bank 1 (or when empty)

Pin 2-3 Four 256Kx9 SIMMs in bank 1

W3 Pin 1-2 Four 1Mx9 SIMMs in bank 2 (or when empty)

W4 Pin 2-3 Four 1Mx9 SIMMs in bank 3 (or when empty)