(TXT) View Source
       
       # MONOLITHIC SYSTEMS, INC. (COLORADO MSI)
       
          MICROPAQ 451
       
          +------------------------------------------------------------+
          |------------------------------------------------------------|
          | Data bus:         | 16-bit, ISA                            |
          |-------------------+----------------------------------------|
          | Size:             | Full-length, full-height card          |
          |-------------------+----------------------------------------|
          | Hard drive        | Two IDE (AT) Interface drives          |
          | supported:        |                                        |
          |-------------------+----------------------------------------|
          | Floppy drives     | Two 360KB, 720KB, 1.2MB, or 1.44MB     |
          | supported:        | drives                                 |
          +------------------------------------------------------------+
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |                   Function                    |  Location  |
          |-----------------------------------------------+------------|
          | 40-pin IDE(AT) Interface connector            |     J1     |
          |-----------------------------------------------+------------|
          | 34-pin control cable connector - floppy drive |     J2     |
          |-----------------------------------------------+------------|
          | 10-pin serial port (COM1/3) - internal        |     J3     |
          |-----------------------------------------------+------------|
          | 10-pin serial port (COM2/4) - internal        |     J4     |
          |-----------------------------------------------+------------|
          | 4-pin connector - Drive active LED            |     J5     |
          |-----------------------------------------------+------------|
          | 15-pin VGA port - external                    |     J6     |
          |-----------------------------------------------+------------|
          | 25-pin parallel port (LPT1/2/3) - external    |     J8     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Function              |  Location   | Setting |
          |------------------------------------+-------------+---------|
          | » | Floppy drive enabled           | S1/switch 1 |   on    |
          |---+--------------------------------+-------------+---------|
          |   | Floppy drive disabled          | S1/switch 1 |   off   |
          |---+--------------------------------+-------------+---------|
          | » | Floppy drive change signal     | S1/switch 2 |   on    |
          |   | sense enabled                  |             |         |
          |---+--------------------------------+-------------+---------|
          |   | Floppy drive change signal     | S1/switch 2 |   off   |
          |   | sense disabled                 |             |         |
          |---+--------------------------------+-------------+---------|
          | » | Single speed floppy drives     | S1/switch 3 |   off   |
          |   | supported                      |             |         |
          |---+--------------------------------+-------------+---------|
          |   | Dual speed floppy drives       | S1/switch 3 |   on    |
          |   | supported                      |             |         |
          |---+--------------------------------+-------------+---------|
          | » | Floppy drive precompensation   | S1/switch 4 |   off   |
          |   | is 125ns                       |             |         |
          |---+--------------------------------+-------------+---------|
          |   | Floppy drive precompensation   | S1/switch 4 |   on    |
          |   | is 187ns                       |             |         |
          |---+--------------------------------+-------------+---------|
          | » | VGA port enabled               | S2/switch 1 |   on    |
          |---+--------------------------------+-------------+---------|
          |   | VGA port disabled              | S2/switch 1 |   off   |
          |---+--------------------------------+-------------+---------|
          | » | 16-bit video bus enabled       | S2/switch 2 |   off   |
          |---+--------------------------------+-------------+---------|
          |   | 8-bit video bus enabled        | S2/switch 2 |   on    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Function              |  Location   | Setting |
          |------------------------------------+-------------+---------|
          | » | Hard drive enabled             | S2/switch 4 |   on    |
          |---+--------------------------------+-------------+---------|
          |   | Hard drive disabled            | S2/switch 4 |   off   |
          |---+--------------------------------+-------------+---------|
          | » | Pin 34 on IDE interface not    | S2/switch 7 |   on    |
          |   | grounded                       |             |         |
          |---+--------------------------------+-------------+---------|
          |   | Pin 34 on IDE interface        | S2/switch 7 |   off   |
          |   | grounded                       |             |         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           SERIAL PORT 1 (J3) CONFIGURATION - S3            |
          |------------------------------------------------------------|
          |  Function  | Switch 1  | Switch 2  | Switch 3  | Switch 4  |
          |------------+-----------+-----------+-----------+-----------|
          | COM1, IRQ4 |    on     |    off    |    off    |    on     |
          |------------+-----------+-----------+-----------+-----------|
          | COM1, IRQ3 |    on     |    off    |    on     |    off    |
          |------------+-----------+-----------+-----------+-----------|
          | COM3, IRQ4 |    off    |    on     |    off    |    on     |
          |------------+-----------+-----------+-----------+-----------|
          | COM3, IRQ3 |    off    |    on     |    on     |    off    |
          |------------+-----------+-----------+-----------+-----------|
          |  Disabled  |    off    |    off    |    off    |    off    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           SERIAL PORT 2 (J4) CONFIGURATION - S3            |
          |------------------------------------------------------------|
          |  Function  | Switch 5  | Switch 6  | Switch 7  | Switch 8  |
          |------------+-----------+-----------+-----------+-----------|
          | COM2, IRQ4 |    on     |    off    |    off    |    on     |
          |------------+-----------+-----------+-----------+-----------|
          | COM2, IRQ3 |    on     |    off    |    on     |    off    |
          |------------+-----------+-----------+-----------+-----------|
          | COM4, IRQ4 |    off    |    on     |    off    |    on     |
          |------------+-----------+-----------+-----------+-----------|
          | COM4, IRQ3 |    off    |    on     |    on     |    off    |
          |------------+-----------+-----------+-----------+-----------|
          |  Disabled  |    off    |    off    |    off    |    off    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           PARALLEL PORT (J8) CONFIGURATION - S4            |
          |------------------------------------------------------------|
          |       LPT        |  Switch 1   |  Switch 2   |  Switch 3   |
          |------------------+-------------+-------------+-------------|
          | » |     LPT1     |     off     |     off     |     off     |
          |---+--------------+-------------+-------------+-------------|
          |   |     LPT2     |     off     |     off     |     on      |
          |---+--------------+-------------+-------------+-------------|
          |   |     LPT3     |     off     |     on      |     off     |
          |---+--------------+-------------+-------------+-------------|
          |   |   Disabled   |     off     |     on      |     on      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |         PARALLEL PORT (J8) INTERRUPT REQUEST - S4          |
          |------------------------------------------------------------|
          |          IRQ           |     Switch 5     |    Switch 6    |
          |------------------------+------------------+----------------|
          | »   |       IRQ7       |       off        |       on       |
          |-----+------------------+------------------+----------------|
          |     |       IRQ5       |        on        |      off       |
          |-----+------------------+------------------+----------------|
          |     |     Disabled     |       off        |      off       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 IDE IOCHRDY PIN SELECTION                 ||
          |-----------------------------------------------------------||
          |          Function          |  S2/switch 5  | S2/switch 6  ||
          |----------------------------+---------------+--------------||
          | » | IDE IOCHRDY from IDE   |      on       |     off      ||
          |   | pin 21 enabled         |               |              ||
          |---+------------------------+---------------+--------------||
          |   | IDE IOCHRDY from IDE   |      off      |      on      ||
          |   | pin 27 enabled         |               |              ||
          |---+--------------------------------------------------------|
          |   | Pin 21 setting is for Seagate, CDC, Imprimis, and      |
          |   | Miniscribe hard drives. Pin 27 setting is for Quantum  |
          |   | hard drives. Conner and WD hard drives ignore the      |
          |   | setting of these switches.                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               MISCELLANEOUS TECHNICAL NOTES                |
          |------------------------------------------------------------|
          | All other switches and jumpers are factory configured - do |
          |                         not alter.                         |
          +------------------------------------------------------------+