MONOLITHIC SYSTEMS, INC. (COLORADO MSI)
=======================================

   SBC486PE PEISA SINGLE BOARD

   Processor        80486SX/80386DX/80486DX2                      
   Processor Speed  25/33/40/50(internal)/50/66(internal)MHz      
   Chip Set         Intel                                         
   Max. Onboard     128MB                                         
   DRAM             
   Cache            128/256KB (on 32-bit external cache module)   
   BIOS             AMI                                           
   Dimensions       339mm x 127mm                                 
   I/O Options      32-bit external cache module slot, PS/2 mouse 
                    port, PS/2 keyboard connector                 
   NPU Options      None                                          

<gopher://bitreich.org/I/th99/m/M-O/31147-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | IDE interface LED |    J1    | Power LED &      |    J7    |
   |                   |          | keylock          |          |
   |-------------------+----------+------------------+----------|
   | Reset switch      |    J2    | Auxiliary        |    J8    |
   |                   |          | keyboard         |          |
   |-------------------+----------+------------------+----------|
   | Power LED         |    J3    | PS/2 keyboard    |    J9    |
   |-------------------+----------+------------------+----------|
   | External battery  |    J4    | PS/2 mouse       |   J11    |
   |-------------------+----------+------------------+----------|
   | Front panel       |    J5    | 32-bit external  |    S1    |
   | switches & LEDs   |          | cache module     |          |
   |-------------------+----------+------------------+----------|
   | Speaker           |    J6    |                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  J10   |    Open    |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  J10   |   Closed   |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select color        |  J12   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  J12   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | Watchdog timer disabled          |  J13   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Watchdog timer enabled           |  J13   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  J14   |   Closed   |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  J14   |   Closed   |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | DMA signal select active high    |  J16   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | DMA signal select active low     |  J16   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size   |    Bank 0     |  Bank 1   |  Bank 2   |  Bank 3  |
   |---------+---------------+-----------+-----------+----------|
   |   1MB   | (1) 256K x 36 |   NONE    |   NONE    |   NONE   |
   |---------+---------------+-----------+-----------+----------|
   |   2MB   | (1) 512K x 36 |   NONE    |   NONE    |   NONE   |
   |---------+---------------+-----------+-----------+----------|
   |   4MB   | (1) 256K x 36 | (1) 256K  | (1) 256K  | (1) 256K |
   |         |               |   x 36    |   x 36    |   x 36   |
   |---------+---------------+-----------+-----------+----------|
   |   4MB   | (1) 512K x 36 | (1) 512K  |   NONE    |   NONE   |
   |         |               |   x 36    |           |          |
   |---------+---------------+-----------+-----------+----------|
   |   6MB   | (1) 512K x 36 | (1) 512K  | (1) 512K  |   NONE   |
   |         |               |   x 36    |   x 36    |          |
   |---------+---------------+-----------+-----------+----------|
   |   8MB   |  (1) 1M x 36  | (1) 1M x  |   NONE    |   NONE   |
   |         |               |    36     |           |          |
   |---------+---------------+-----------+-----------+----------|
   |   8MB   |  (1) 2M x 36  |   NONE    |   NONE    |   NONE   |
   |---------+---------------+-----------+-----------+----------|
   |  12MB   |  (1) 1M x 36  | (1) 1M x  | (1) 1M x  |   NONE   |
   |         |               |    36     |    36     |          |
   |---------+---------------+-----------+-----------+----------|
   |  16MB   |  (1) 2M x 36  | (1) 2M x  |   NONE    |   NONE   |
   |         |               |    36     |           |          |
   |---------+---------------+-----------+-----------+----------|
   |  16MB   |  (1) 4M x 36  |   NONE    |   NONE    |   NONE   |
   |---------+---------------+-----------+-----------+----------|
   |  32MB   |  (1) 2M x 36  | (1) 2M x  | (1) 2M x  | (1) 2M x |
   |         |               |    36     |    36     |    36    |
   |---------+---------------+-----------+-----------+----------|
   |  32MB   |  (1) 4M x 36  | (1) 4M x  |   NONE    |   NONE   |
   |         |               |    36     |           |          |
   |---------+---------------+-----------+-----------+----------|
   |  32MB   |  (1) 8M x 36  |   NONE    |   NONE    |   NONE   |
   |---------+---------------+-----------+-----------+----------|
   |  48MB   |  (1) 4M x 36  | (1) 4M x  | (1) 4M x  |   NONE   |
   |         |               |    36     |    36     |          |
   |---------+---------------+-----------+-----------+----------|
   |  64MB   |  (1) 4M x 36  | (1) 4M x  | (1) 4M x  | (1) 4M x |
   |         |               |    36     |    36     |    36    |
   |---------+---------------+-----------+-----------+----------|
   |  64MB   |  (1) 8M x 36  | (1) 8M x  |   NONE    |   NONE   |
   |         |               |    36     |           |          |
   |---------+---------------+-----------+-----------+----------|
   |  96MB   |  (1) 8M x 36  | (1) 8M x  | (1) 8M x  |   NONE   |
   |         |               |    36     |    36     |          |
   |---------+---------------+-----------+-----------+----------|
   |  128MB  |  (1) 8M x 36  | (1) 8M x  | (1) 8M x  | (1) 8M x |
   |         |               |    36     |    36     |    36    |
   |------------------------------------------------------------|
   | Note:These are only some of the possible configurations.   |
   | All modules must be of like capacity.                      |
   +------------------------------------------------------------+