ATC/UNITRON COMPUTERS & COMPUTER PARTS
======================================

   MB532

   Processor    Pentium                                           
   Processor    75/90/100/120/133MHz                              
   Speed        
   Chip Set     Intel                                             
   Max. Onboard 128MB                                             
   DRAM         
   Cache        256/512KB                                         
   BIOS         Award                                             
   Dimensions   330mm x 218mm                                     
   I/O Options  32-bit PCI slots (4), floppy drive interface,     
                green PC connector, IDE interfaces (2), parallel  
                port, serial ports (2), cache slot                
   NPU Options  None                                              

<gopher://bitreich.org/I/th99/m/A-B/33076-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | Serial port 1     |   CN1    | VRM module       |   JP20   |
   |                   |          | connector        |          |
   |-------------------+----------+------------------+----------|
   | Serial port 2     |   CN2    | Speaker          |   JP21   |
   |-------------------+----------+------------------+----------|
   | Parallel port     |   CN3    | Power LED &      |   JP22   |
   |                   |          | keylock          |          |
   |-------------------+----------+------------------+----------|
   | Floppy drive      |   CN4    | Reset switch     |   JP23   |
   | interface         |          |                  |          |
   |-------------------+----------+------------------+----------|
   | IDE interface 2   |   CN5    | Green PC         |   JP24   |
   |                   |          | connector        |          |
   |-------------------+----------+------------------+----------|
   | IDE interface 1   |   CN6    | 32-bit PCI slots |  PC1 -   |
   |                   |          |                  |   PC4    |
   |-------------------+----------+------------------+----------|
   | IDE interface LED |   JP7    | Cache slot       |   SL1    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  JP2   |    Open    |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP2   |   Closed   |
   |---+----------------------------------+--------+------------|
   |>> | BIOS type select EPROM/5v flash  |  JP3   |    Open    |
   |---+----------------------------------+--------+------------|
   |   | BIOS type select 12v flash       |  JP3   |   Closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  JP6   |    N/A     |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |   | AT bus clock select CPU speed/8  |  JP12  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | AT bus clock select CPU speed/6  |  JP12  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       8MB        |    (2) 1M x 36     |        NONE        |
   |------------------+--------------------+--------------------|
   |       8MB        |        NONE        |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       16MB       |    (2) 2M x 36     |        NONE        |
   |------------------+--------------------+--------------------|
   |       16MB       |        NONE        |    (2) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       16MB       |    (2) 1M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       24MB       |    (2) 1M x 36     |    (2) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       24MB       |    (2) 2M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       32MB       |    (2) 4M x 36     |        NONE        |
   |------------------+--------------------+--------------------|
   |       32MB       |        NONE        |    (2) 4M x 36     |
   |------------------+--------------------+--------------------|
   |       32MB       |    (2) 2M x 36     |    (2) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       40MB       |    (2) 1M x 36     |    (2) 4M x 36     |
   |------------------+--------------------+--------------------|
   |       40MB       |    (2) 4M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       48MB       |    (2) 2M x 36     |    (2) 4M x 36     |
   |------------------+--------------------+--------------------|
   |       48MB       |    (2) 4M x 36     |    (2) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (2) 8M x 36     |        NONE        |
   |------------------+--------------------+--------------------|
   |       64MB       |        NONE        |    (2) 8M x 36     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (2) 4M x 36     |    (2) 4M x 36     |
   |------------------+--------------------+--------------------|
   |       72MB       |    (2) 1M x 36     |    (2) 8M x 36     |
   |------------------+--------------------+--------------------|
   |       72MB       |    (2) 8M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       80MB       |    (2) 2M x 36     |    (2) 8M x 36     |
   |------------------+--------------------+--------------------|
   |       80MB       |    (2) 8M x 36     |    (2) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       96MB       |    (2) 4M x 36     |    (2) 8M x 36     |
   |------------------+--------------------+--------------------|
   |       96MB       |    (2) 8M x 36     |    (2) 4M x 36     |
   |------------------+--------------------+--------------------|
   |      128MB       |    (2) 8M x 36     |    (2) 8M x 36     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size     |    Bank 0    |     TAG     |       SL1       |
   |-------------+--------------+-------------+-----------------|
   |  256KB (A)  | (8) 32K x 8  | (1) 8K x 8  |  Not installed  |
   |-------------+--------------+-------------+-----------------|
   |  256KB (B)  |     NONE     | (1) 8K x 8  |    Installed    |
   |-------------+--------------+-------------+-----------------|
   |  512KB (A)  | (8) 64K x 8  | (1) 16K x 8 |  Not installed  |
   |-------------+--------------+-------------+-----------------|
   |  512KB (B)  |     NONE     | (1) 16K x 8 |    Installed    |
   |------------------------------------------------------------|
   | Note: The location of Bank 0 and TAG is not exact. It is   |
   | shown for approximate location purposes only.              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               CPU CLOCK SPEED CONFIGURATION                |
   |------------------------------------------------------------|
   |       Speed       |        JP8         |        JP9        |
   |-------------------+--------------------+-------------------|
   |       50MHz       |       Closed       |      Closed       |
   |-------------------+--------------------+-------------------|
   |       60MHz       |        Open        |      Closed       |
   |-------------------+--------------------+-------------------|
   |       66MHz       |       Closed       |       Open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |           CPU INTERNAL CLOCK SPEED CONFIGURATION           |
   |------------------------------------------------------------|
   |       Speed       |        JP16        |       JP17        |
   |-------------------+--------------------+-------------------|
   |       1.5x        |        Open        |       Open        |
   |-------------------+--------------------+-------------------|
   |        2x         |       Closed       |       Open        |
   |-------------------+--------------------+-------------------|
   |       2.5x        |       Closed       |      Closed       |
   |-------------------+--------------------+-------------------|
   |        3x         |        Open        |      Closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CPU VOLTAGE CONFIGURATION                  |
   |------------------------------------------------------------|
   |          Voltage           |             JP11              |
   |----------------------------+-------------------------------|
   |            3.3v            |       pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |            3.5v            |       pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DMA CONFIGURATION                      |
   |------------------------------------------------------------|
   |       DMA        |        JP4         |        JP5         |
   |------------------+--------------------+--------------------|
   |      DMA 1       | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |      DMA 3       | pins 2 & 3 closed  | pins 2 & 3 closed  |
   +------------------------------------------------------------+