RELIALOGIC CORPORATION PRIVATE, LTD.
====================================

   XL505

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:         | 32-bit, VL-Bus                         |
   |-------------------+----------------------------------------|
   | Size:             | Three quarter-length, half-height card |
   |-------------------+----------------------------------------|
   | Hard drive        | Two IDE (AT) interface drives          |
   | supported:        |                                        |
   |-------------------+----------------------------------------|
   | Floppy drives     | 360KB, 720KB, 1.2MB, or 1.44MB drives  |
   | supported:        |                                        |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/P-R/20744-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                    Function                     | Location |
   |-------------------------------------------------+----------|
   | 25-pin parallel port                            |    J1    |
   |-------------------------------------------------+----------|
   | 9-pin serial port 1 (external)/10-pin serial    |    J2    |
   | port (internal)                                 |          |
   |-------------------------------------------------+----------|
   | 10-pin serial port 2 - internal                 |    J4    |
   |-------------------------------------------------+----------|
   | 34-pin connector - floppy drive                 |    J5    |
   |-------------------------------------------------+----------|
   | 40-pin IDE(AT) interface                        |    J6    |
   |-------------------------------------------------+----------|
   | 4-pin drive active LED                          |    J7    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Factory configured - do no     |   JP4    |    open    |
   |   | alter                          |          |            |
   |---+--------------------------------+----------+------------|
   |>> | IDE interface enabled          |   JP6    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | IDE interface disabled         |   JP6    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy drive interface enabled |   JP7    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive interface         |   JP7    | pins 2 & 3 |
   |   | disabled                       |          |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   BASE ADDRESS SELECTION                   |
   |------------------------------------------------------------|
   |      Address      |    JP3/1    |    JP3/2    |   JP3/3    |
   |-------------------+-------------+-------------+------------|
   |>> |  C800-CBFFh   |   closed    |   closed    |   closed   |
   |---+---------------+-------------+-------------+------------|
   |   |  CC00-CFFFh   |    open     |   closed    |   closed   |
   |---+---------------+-------------+-------------+------------|
   |   |  D000-D3FFh   |   closed    |    open     |   closed   |
   |---+---------------+-------------+-------------+------------|
   |   |  D400-D7FFh   |    open     |    open     |   closed   |
   |---+---------------+-------------+-------------+------------|
   |   |  D800-DBFFh   |   closed    |   closed    |    open    |
   |---+---------------+-------------+-------------+------------|
   |   |  DC00-DFFFh   |    open     |   closed    |    open    |
   |---+---------------+-------------+-------------+------------|
   |   |   Disabled    |    open     |    open     |   closed   |
   |---+---------------+-------------+-------------+------------|
   |   |   Disabled    |    open     |    open     |    open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                PARALLEL PORT CONFIGURATION                 |
   |------------------------------------------------------------|
   |       LPT        |        JP12        |        JP13        |
   |------------------+--------------------+--------------------|
   |>> |     LPT2     | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |     LPT1     | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |     LPT3     | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   Disabled   | pins 2 & 3 closed  | pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |            SERIAL PORT 1 &AMP; 2 CONFIGURATION             |
   |------------------------------------------------------------|
   |  COM (Serial  |   COM (Serial   |  JP9   |  JP10  |  JP11  |
   |    Port 1)    |     Port 2)     |        |        |        |
   |---------------+-----------------+--------+--------+--------|
   |>> |   COM1    |      COM2       | pins 1 | pins 1 | pins 2 |
   |   |           |                 |  & 2   |  & 2   |  & 3   |
   |---+-----------+-----------------+--------+--------+--------|
   |   |   COM2    |      COM1       | pins 1 | pins 1 | pins 1 |
   |   |           |                 |  & 2   |  & 2   |  & 2   |
   |---+-----------+-----------------+--------+--------+--------|
   |   |   COM3    |      COM4       | pins 2 | pins 2 | pins 1 |
   |   |           |                 |  & 3   |  & 3   |  & 2   |
   |---+-----------+-----------------+--------+--------+--------|
   |   |   COM1    |    Disabled     | pins 1 | pins 2 | pins 2 |
   |   |           |                 |  & 2   |  & 3   |  & 3   |
   |---+-----------+-----------------+--------+--------+--------|
   |   |   COM2    |    Disabled     | pins 2 | pins 1 | pins 1 |
   |   |           |                 |  & 3   |  & 2   |  & 2   |
   |---+-----------+-----------------+--------+--------+--------|
   |   | Disabled  |      COM1       | pins 1 | pins 2 | pins 1 |
   |   |           |                 |  & 2   |  & 3   |  & 2   |
   |---+-----------+-----------------+--------+--------+--------|
   |   | Disabled  |      COM2       | pins 2 | pins 1 | pins 2 |
   |   |           |                 |  & 3   |  & 2   |  & 3   |
   |---+-----------+-----------------+--------+--------+--------|
   |   | Disabled  |    Disabled     | pins 2 | pins 2 | pins 2 |
   |   |           |                 |  & 3   |  & 3   |  & 3   |
   |------------------------------------------------------------|
   | Note: Designated pins are in the closed position.          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |         SERIAL PORT 1 &AMP; 2 INTERRUPT SELECTION          |
   |------------------------------------------------------------|
   | IRQ (Serial |  IRQ (Serial Port  |    JP5     |    JP8     |
   |   Port 1)   |         2)         |            |            |
   |-------------+--------------------+------------+------------|
   |>>    |  4   |         3          | pins 1 & 2 | pins 2 & 3 |
   |------+------+--------------------+------------+------------|
   |      |  3   |         4          | pins 2 & 3 | pins 1 & 2 |
   |------------------------------------------------------------|
   | Note: Designated pins are in the closed position.          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |   IRQ 7 for the parallel port is factory configured and    |
   |                     cannot be altered.                     |
   +------------------------------------------------------------+