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

   MICROFRAME 486M

                                                                  
   Processor             80486DX                                  
   Processor Speed       25MHz                                    
   Chip Set              C & T                                    
   Max. Onboard DRAM     8MB                                      
   Cache                 None                                     
   BIOS                  Quadtel                                  
   Dimensions            330.2mm x 221mm                          
   I/O Options           32-bit external memory card slot         
   NPU Options           4167                                     

<gopher://bitreich.org/I/th99/m/M-O/30006-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose            | Location | Purpose         | Location |
   |--------------------+----------+-----------------+----------|
   | External battery   |    J1    | Turbo LED       |   J10    |
   |--------------------+----------+-----------------+----------|
   | Drive active LED   |    J3    | CPU ready LED   |   J11    |
   |--------------------+----------+-----------------+----------|
   | Front panel ribbon |    J6    | Speaker         |   J19    |
   | cable              |          |                 |          |
   |--------------------+----------+-----------------+----------|
   | Reset switch       |    J7    | Power LED &     |   J40    |
   |                    |          | keylock         |          |
   |--------------------+----------+-----------------+----------|
   | Auxiliary keyboard |    J8    | 32-bit external |    S1    |
   |                    |          | memory card     |          |
   |------------------------------------------------------------|
   | Note:If the front panel Drive LED is to be used, the drive |
   | active signal from the drive or drive controller           |
   |                                                            |
   | must be connected to J3/pins 1 & 2 or J3/pins 2 & 3.       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |   J2   |    Open    |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |   J2   |   Closed   |
   |---+----------------------------------+--------+------------|
   |>> | DMA active signal select high    |  J12   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | DMA active signal select low     |  J12   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | NPU parity check enabled         |  J13   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | NPU parity check disabled        |  J13   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | Internal CPU cache enabled       |  J16   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | Internal CPU cache disabled      |  J16   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | NPU zero wait state enabled      |  J17   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | NPU zero wait state disabled     |  J17   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | Internal CPU caching of BIOS     |  J18   | pins 1 & 2 |
   |   | disabled                         |        |    open    |
   |---+----------------------------------+--------+------------|
   |   | Internal CPU caching of BIOS     |  J18   | pins 1 & 2 |
   |   | enabled                          |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | I Factory test jumper- do not    |  J24   |   Closed   |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | POST enabled                     |  J25   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | POST disabled                    |  J25   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | Factory test jumper - do not     |  J26   |   Closed   |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | NPU disabled                     |  J33   |    Open    |
   |---+----------------------------------+--------+------------|
   |   | NPU enabled                      |  J33   |   Closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory test jumper - do not     |  J34   |   Closed   |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Factory test jumper - do not     |  J35   |   Closed   |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Factory test jumper - do not     |  J36   |   Closed   |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select color        |  J39   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  J39   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |------------------------------------------------------------|
   | Note:Locations of J18, J34, J35, & J36 are unknown.        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       1MB        |    (4) 256K x 9    |        NONE        |
   |------------------+--------------------+--------------------|
   |       2MB        |    (4) 256K x 9    |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       4MB        |     (4) 1M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                J6 - RIBBON CABLE CONNECTOR                 |
   |                                                            |
   |                      PIN ASSIGNMENTS                       |
   |------------------------------------------------------------|
<gopher://bitreich.org/I/th99/m/M-O/30006-2.png>
   |                                                    |
   +------------------------------------------------------------+