(TXT) View Source
       
       # EVEREX SYSTEMS, INC.
       
          EV-391
       
          +------------------------------------------------------------+
          +------------------------------------------------------------+
       
          Data bus: 8-bit, ISA
       
          Size: Full-length, full-height card
       
          Hard drives supported:  Two MFM ST506/412 drives
       
          Floppy drives supported: None
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |                   Function                   |  Location   |
          |----------------------------------------------+-------------|
          | 34-pin control cable connector-hard drive    |     J1      |
          |----------------------------------------------+-------------|
          | 20-pin data cable connector-drive 0          |     J2      |
          |----------------------------------------------+-------------|
          | 20-pin data cable connector-drive 1          |     J3      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |             Function              | Location  |  Setting   |
          |-----------------------------------+-----------+------------|
          | » | Normal operation              |    W1     | pins 1 & 2 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          |   | Factory test                  |    W1     | pins 2 & 3 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          | » | Normal operation              |    W2     | pins 1 & 2 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          |   | Factory test                  |    W2     | pins 2 & 3 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          | » | BIOS enabled                  |    W3     |   closed   |
          |---+-------------------------------+-----------+------------|
          |   | BIOS disabled                 |    W3     |    open    |
          |---+-------------------------------+-----------+------------|
          | » | I/O port address 320h         |    W4     | pins 2 & 3 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          |   | I/O port address 324h         |    W4     | pins 1 & 2 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          | » | BIOS size 32K or 64K          |    W5     | pins 1 & 2 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          |   | BIOS size 16K                 |    W5     | pins 2 & 3 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          | » | 8 Head hard drive with RWC    |    W6     | pins 2 & 3 |
          |   | (Head Select 3 invalid)       |           |   closed   |
          |---+-------------------------------+-----------+------------|
          |   | 16 head hard drive supported  |    W6     | pins 1 & 2 |
          |   | (Head Select 3 valid)         |           |   closed   |
          |---+-------------------------------+-----------+------------|
          | » | Hard drive interrupt is IRQ5  |    W7     | pins 1 & 2 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          |   | Hard drive interrupt is IRQ2  |    W7     | pins 2 & 3 |
          |   |                               |           |   closed   |
          |------------------------------------------------------------|
          | Note:SW1/switches 5, 6, 7, and 8 are reserved for BIOS     |
          | functions and should not be altered.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                BIOS DRIVE TYPE TABLE - SW1                 |
          |                                                            |
          |                   (FOR EPROM REV. 3.92A)                   |
          |------------------------------------------------------------|
          |# |Jumper 1 |Jumper 2 |Jumper 3 |Jumper 4 |Cap. |Hds. |Cyls.|
          |  |         |         |         |         |     |     |     |
          |  | Drv. 1  | Drv. 1  | Drv. 0  | Drv. 0  |     |     |     |
          |--+---------+---------+---------+---------+-----+-----+-----|
          |0 | closed  | closed  | closed  | closed  |42MB |  5  | 977 |
          |--+---------+---------+---------+---------+-----+-----+-----|
          |1 |  open   | closed  |  open   | closed  |21MB |  4  | 615 |
          |--+---------+---------+---------+---------+-----+-----+-----|
          |2 | closed  |  open   | closed  |  open   |10MB |  2  | 615 |
          |--+---------+---------+---------+---------+-----+-----+-----|
          |3 |  open   |  open   |  open   |  open   |10MB |  4  | 306 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               MISCELLANEOUS TECHNICAL NOTES                |
          |------------------------------------------------------------|
          |  This controller has a built-in low-level format program.  |
          |  To enter the program run the DEBUG utility supplied with  |
          |           DOS and at the prompt enter: G=C800:5.           |
          +------------------------------------------------------------+