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