TMC RESEARCH CORPORATION
========================

   PAT48PX (LOCAL BUS)

   Processor       80486SX/80487SX/80486DX/ODP486SX/80486DX2      
   Processor Speed 20/25/33/40(internal)/50/66(internal)MHz       
   Chip Set        OPTI                                           
   Max. Onboard    32MB                                           
   DRAM            
   Cache           64/128/256KB                                   
   BIOS            AMI                                            
   Dimensions      330mm x 218mm                                  
   I/O Options     32-bit external memory card slot, 32-bit local 
                   bus card slots (2)                             
   NPU Options     4167                                           

<gopher://bitreich.org/I/th99/m/S-T/30824-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose        | Location  | Purpose          |  Location  |
   |----------------+-----------+------------------+------------|
   | External       |    J10    | IDE LED in       |  J23 pins  |
   | battery        |           |                  |  10 & 20   |
   |----------------+-----------+------------------+------------|
   | Speaker        | J23 pins  | Power LED &      |  J23 pins  |
   |                |   1 - 4   | keylock          |  11 - 15   |
   |----------------+-----------+------------------+------------|
   | Turbo switch   | J23 pins  | IDE LED out      |    JP12    |
   |                |  7 & 17   |                  |            |
   |----------------+-----------+------------------+------------|
   | Turbo LED      | J23 pins  | 32-bit local bus | LB1 & LB2  |
   |                |  8 & 18   | card             |            |
   |----------------+-----------+------------------+------------|
   | Reset switch   | J23 pins  | 32-bit external  |     S1     |
   |                |  9 & 19   | memory card      |            |
   |------------------------------------------------------------|
   | Note:Local bus slots may also be used as normal ISA slots. |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Monitor type select color        |  JP1   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  JP1   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  JP2   | pins 2 & 3 |
   |   | (internal battery)               |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory normal operation     |  JP2   |    Open    |
   |   | (external battery at J4)         |        |            |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP2   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Bus speed select CLKIN/4         |  JP3   |    Open    |
   |---+----------------------------------+--------+------------|
   |   | Bus speed select CLKIN/6         |  JP3   |   Closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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        |
   |------------------+--------------------+--------------------|
   |       5MB        |    (4) 256K x 9    |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  | Bank 0  | Bank 1 |   TAG   |   TAG   |  Resistor   |
   |       |         |        |  (U33)  |  (U34)  |  Installed  |
   |-------+---------+--------+---------+---------+-------------|
   | 64KB  | (4) 8K  | (4) 8K | (1) 4K  | (1) 8K  |     RND     |
   |       |   x 8   |  x 8   |   x 1   |   x 8   |             |
   |-------+---------+--------+---------+---------+-------------|
   | 64KB  | (4) 8K  | (4) 8K | (1) 16K | (1) 8K  |     RND     |
   |       |   x 8   |  x 8   |   x 1   |   x 8   |             |
   |-------+---------+--------+---------+---------+-------------|
   | 64KB  | (4) 8K  | (4) 8K | (1) 64K | (1) 8K  |     RND     |
   |       |   x 8   |  x 8   |   x 1   |   x 8   |             |
   |-------+---------+--------+---------+---------+-------------|
   | 128KB | (4) 32K |  NONE  | (1) 16K | (1) 8K  |     RNF     |
   |       |   x 8   |        |   x 1   |   x 8   |             |
   |-------+---------+--------+---------+---------+-------------|
   | 128KB | (4) 32K |  NONE  | (1) 64K | (1) 8K  |     RNF     |
   |       |   x 8   |        |   x 1   |   x 8   |             |
   |-------+---------+--------+---------+---------+-------------|
   | 256KB | (4) 32K |  (4)   | (1) 16K | (1) 32K |     RNE     |
   |       |   x 8   | 32K x  |   x 1   |   x 8   |             |
   |       |         |   8    |         |         |             |
   |-------+---------+--------+---------+---------+-------------|
   | 256KB | (4) 32K |  (4)   | (1) 64K | (1) 32K |     RNE     |
   |       |   x 8   | 32K x  |   x 1   |   x 8   |             |
   |       |         |   8    |         |         |             |
   |------------------------------------------------------------|
   | Notes: If DRAM is GBP 16MB, all cache sizes may be           |
   | installed, if DRAM is > 16MB and GBP 32MB,                   |
   |                                                            |
   | 128 or 256KB cache must be installed, if DRAM > 32MB,      |
   | 256KB cache must be installed.                             |
   |                                                            |
   | (Memory over 32MB would be installed on the proprietary    |
   | external memory card.)                                     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |   Type    |      RNA       |      RNB      |      RNC      |
   |-----------+----------------+---------------+---------------|
   |  80486SX  | Not installed  | Not installed |   Installed   |
   |-----------+----------------+---------------+---------------|
   |  80487SX  | Not installed  |   Installed   | Not installed |
   |-----------+----------------+---------------+---------------|
   | ODP486SX  | Not installed  |   Installed   | Not installed |
   |-----------+----------------+---------------+---------------|
   |  80486DX  |   Installed    | Not installed | Not installed |
   |-----------+----------------+---------------+---------------|
   | 80486DX2  |   Installed    | Not installed | Not installed |
   +------------------------------------------------------------+