DISTRIBUTED PROCESSING TECHNOLOGY
=================================

   PM1554U2, PM2554U2, PM2654U2

   Card Type       Hard drive controller                          
   Chip Set        Unidentified                                   
   Maximum Onboard 256MB DRAM with memory module                  
   Memory          
   I/O Options     SCSI connectors (2), expansion module          
                   connectors (2)                                 
   Hard Drives     Up to 15 Ultra2/LVD Wide SCSI devices          
   supported                                                      
                   Up to 45 Wide SCSI-2 or Ultra-wide SCSI        
                   devices with expansion board upgrades          
   Floppy drives   None                                           
   supported       
   Data Bus        32-bit PCI                                     
   Card Size       Full-length                                    

<gopher://bitreich.org/I/th99/c/C-D/21611-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |        Function        | Label |     Function      | Label |
   |------------------------+-------+-------------------+-------|
   | End connector to       |  J6   | 68-pin SCSI       |  J11  |
   | memory accelerator     |       | connector Ch. 0 - |       |
   | expansion module       |       | external          |       |
   |------------------------+-------+-------------------+-------|
   | Header connector to    |  J7   | 4-pin connector - |  P6   |
   | bus expansion module   |       | drive active LED  |       |
   |------------------------+-------+-------------------+-------|
   | 68-pin SCSI connector  |  J10  |                   |       |
   | C.h 0 - internal       |       |                   |       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function             | Label |     Position     |
   |---------------------------------+-------+------------------|
   | NVRAM reset to default settings |  P4   |    Pins 1 & 2    |
   |                                 |       |      closed      |
   |---------------------------------+-------+------------------|
   | NVRAM setup parameters retained |  P4   |    Pins 3 & 4    |
   |                                 |       |      closed      |
   |---------------------------------+-------+------------------|
   | Load enabled                    |  P9   |    Pins 1 & 2    |
   |                                 |       |      closed      |
   |---------------------------------+-------+------------------|
   | Run enabled                     |  P9   |    Pins 3 & 4    |
   |                                 |       |      closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   | LED  |    Color     |  Status  |         Condition         |
   |------+--------------+----------+---------------------------|
   | LED1 | Unidentified |    On    |   Controller is ready;    |
   |      |              |          |  interrupts are enabled   |
   |------+--------------+----------+---------------------------|
   | LED1 | Unidentified |   Off    |  Controller is inactive   |
   |------+--------------+----------+---------------------------|
   | LED1 | Unidentified | Blinking |   Controller is active    |
   |------+--------------+----------+---------------------------|
   | LED2 | Unidentified |    On    |  Non-maskable interrupt   |
   |      |              |          |      (NMI) detected       |
   |------+--------------+----------+---------------------------|
   | LED2 | Unidentified |   Off    |     NMI not detected      |
   |------+--------------+----------+---------------------------|
   | LED3 | Unidentified |    On    |  Controller in idle loop  |
   |      |              |          |           mode            |
   |------+--------------+----------+---------------------------|
   | LED3 | Unidentified |   Off    |  Controller not in idle   |
   |      |              |          |         loop mode         |
   |------+--------------+----------+---------------------------|
   | LED4 | Unidentified |    On    |    Interrupt is being     |
   |      |              |          |         processed         |
   |------+--------------+----------+---------------------------|
   | LED4 | Unidentified |   Off    |  Interrupt is not being   |
   |      |              |          |         processed         |
   |------+--------------+----------+---------------------------|
   | LED5 | Unidentified |   Off    |         Not used          |
   |------+--------------+----------+---------------------------|
   | LED6 | Unidentified |    On    | Cache controller is using |
   |      |              |          |   DMA to perform a data   |
   |      |              |          |         transfer          |
   |------+--------------+----------+---------------------------|
   | LED6 | Unidentified |   Off    |  Cache controller is not  |
   |      |              |          |  using DMA to perform a   |
   |      |              |          |       data transfer       |
   |------+--------------+----------+---------------------------|
   | LED7 | Unidentified |    On    | Parity is being generated |
   |------+--------------+----------+---------------------------|
   | LED7 | Unidentified |   Off    |    Parity is not being    |
   |      |              |          |         generated         |
   |------+--------------+----------+---------------------------|
   | LED8 | Unidentified |    On    | Command detected on SCSI  |
   |------+--------------+----------+---------------------------|
   | LED8 | Unidentified |   Off    |  Command not detected on  |
   |      |              |          |           SCSI            |
   |------+--------------+----------+---------------------------|
   | IRQ  | Unidentified |    On    |    Interrupt has been     |
   |      |              |          | activated on host PCI bus |
   |------+--------------+----------+---------------------------|
   | IRQ  | Unidentified |   Off    |  Interrupt has not been   |
   |      |              |          | activated on host PCI bus |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/C-D/21611-2.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |               Function               |        Label        |
   |--------------------------------------+---------------------|
   | Docking connector to Controller card |         J1          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   |  LED  | Color | Status |             Condition             |
   |-------+-------+--------+-----------------------------------|
   | ECCEN | Green |   On   |      Cache is ECC protected       |
   |-------+-------+--------+-----------------------------------|
   | ECCEN | Green |  Off   |    Cache is not ECC protected     |
   |-------+-------+--------+-----------------------------------|
   | ECCER |  Red  |   On   |   Error detected. Cache failure   |
   |       |       |        |       information reported        |
   |-------+-------+--------+-----------------------------------|
   | ECCER |  Red  |  Off   |        Error not detected         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SIMM MEMORY CONFIGURATION                  |
   |------------------------------------------------------------|
   | Size  |   Bank 0    |   Bank 1   |   Bank 2   |   Bank 3   |
   |-------+-------------+------------+------------+------------|
   | 16MB  | (1)4MB x 32 |    None    |    None    |    None    |
   |-------+-------------+------------+------------+------------|
   | 32MB  | (1)4MB x 32 |  (1)4MB x  |    None    |    None    |
   |       |             |     32     |            |            |
   |-------+-------------+------------+------------+------------|
   | 48MB  | (1)4MB x 32 |  (1)4MB x  |  (1)4MB x  |    None    |
   |       |             |     32     |     32     |            |
   |-------+-------------+------------+------------+------------|
   | 64MB  | (1)4MB x 32 |  (1)4MB x  |  (1)4MB x  |  (1)4MB x  |
   |       |             |     32     |     32     |     32     |
   |-------+-------------+------------+------------+------------|
   | 64MB  |  (1)16MB x  |    None    |    None    |    None    |
   |       |     32      |            |            |            |
   |-------+-------------+------------+------------+------------|
   | 80MB  |  (1)16MB x  |  (1)4MB x  |    None    |    None    |
   |       |     32      |     32     |            |            |
   |-------+-------------+------------+------------+------------|
   | 128MB |  (1)16MB x  | (1)16MB x  |    None    |    None    |
   |       |     32      |     32     |            |            |
   |-------+-------------+------------+------------+------------|
   | 144MB |  (1)16MB x  | (1)16MB x  |  (1)4MB x  |    None    |
   |       |     32      |     32     |     32     |            |
   |-------+-------------+------------+------------+------------|
   | 160MB |  (1)16MB x  | (1)16MB x  |  (1)4MB x  |    None    |
   |       |     32      |     32     |     32     |            |
   |-------+-------------+------------+------------+------------|
   | 192MB |  (1)16MB x  | (1)16MB x  | (1)16MB x  |    None    |
   |       |     32      |     32     |     32     |            |
   |-------+-------------+------------+------------+------------|
   | 208MB |  (1)16MB x  | (1)16MB x  | (1)16MB x  |  (1)4MB x  |
   |       |     32      |     32     |     32     |     32     |
   |-------+-------------+------------+------------+------------|
   | 256MB |  (1)16MB x  | (1)16MB x  | (1)16MB x  | (1)16MB x  |
   |       |     32      |     32     |     32     |     32     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   | For information on bus expansion modules, see DISTRIBUTED  |
   | PROCESSING TECHNOLOGY PM3754U2                             |
   +------------------------------------------------------------+