IRWIN
=====

   SC499-2

   Card Type               Tape drive controller                  
   Hard Drives supported   None                                   
   Floppy drives supported None                                   
   Data Bus                8-bit ISA                              
   Card Size               Half-length, full-height               

<gopher://bitreich.org/I/th99/i/I-L/53125-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |           Function            |           Label            |
   |-------------------------------+----------------------------|
   | Tape drive interface          |             J3             |
   |------------------------------------------------------------|
   |      Note:Number of pins is unidentified.                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               |  Label  | Position  |
   |--------------------------------------+---------+-----------|
   |>>   | Factory configured - do not    |   A/8   |  Closed   |
   |     | alter                          |         |           |
   |-----+--------------------------------+---------+-----------|
   |>>   | PC's <386-20 mode enabled      |   B/1   |   Open    |
   |-----+--------------------------------+---------+-----------|
   |     | PC's >386-20 mode enabled      |   B/1   |  Closed   |
   |-----+--------------------------------+---------+-----------|
   |>>   | POST enabled                   |   C/1   |  Closed   |
   |-----+--------------------------------+---------+-----------|
   |     | POST disabled                  |   C/1   |   Open    |
   |-----+--------------------------------+---------+-----------|
   |>>   | Factory configured - do not    |   C/2   |   Open    |
   |     | alter                          |         |           |
   |-----+--------------------------------+---------+-----------|
   |>>   | Factory configured - do not    |   C/3   |   Open    |
   |     | alter                          |         |           |
   |-----+--------------------------------+---------+-----------|
   |>>   | Factory configured - do not    |   C/4   |   Open    |
   |     | alter                          |         |           |
   |-----+--------------------------------+---------+-----------|
   |>>   | Factory configured - do not    |   C/5   |  Closed   |
   |     | alter                          |         |           |
   |-----+--------------------------------+---------+-----------|
   |>>   | Factory configured - do not    |   C/6   |  Closed   |
   |     | alter                          |         |           |
   |-----+--------------------------------+---------+-----------|
   |>>   | Factory configured - do not    |   C/7   |   Open    |
   |     | alter                          |         |           |
   |------------------------------------------------------------|
   |      Note: When installing the controller in a PC >386-20  |
   |      disable POST.                                         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   DMA CHANNEL SELECTION                    |
   |------------------------------------------------------------|
   | Channel |  B1/1  |  B1/2  |  B1/3  | B2/1  | B2/2  | B2/3  |
   |---------+--------+--------+--------+-------+-------+-------|
   |>>  |  1  | Closed |  Open  |  Open  |Closed | Open  | Open  |
   |---+-----+--------+--------+--------+-------+-------+-------|
   |   |  2  |  Open  | Closed |  Open  | Open  |Closed | Open  |
   |---+-----+--------+--------+--------+-------+-------+-------|
   |   |  3  |  Open  |  Open  | Closed | Open  | Open  |Closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 BASE I/O ADDRESS SELECTION                 |
   |------------------------------------------------------------|
   |Address |  A/1  |  A/2  |  A/3  | A/4  | A/5  | A/6  | A/7  |
   |--------+-------+-------+-------+------+------+------+------|
   |  |100h |Closed |Closed |Closed |Closed|Closed| Open |Closed|
   |--+-----+-------+-------+-------+------+------+------+------|
   |>> |200h |Closed |Closed |Closed |Closed|Closed|Closed| Open |
   |--+-----+-------+-------+-------+------+------+------+------|
   |  |220h |Closed |Closed | Open  |Closed|Closed|Closed| Open |
   |--+-----+-------+-------+-------+------+------+------+------|
   |  |280h |Closed |Closed |Closed |Closed| Open |Closed| Open |
   |--+-----+-------+-------+-------+------+------+------+------|
   |  |300h |Closed |Closed |Closed |Closed|Closed| Open | Open |
   |--+-----+-------+-------+-------+------+------+------+------|
   |  |338h | Open  | Open  | Open  |Closed|Closed| Open | Open |
   |--+-----+-------+-------+-------+------+------+------+------|
   |  |350h |Closed | Open  |Closed | Open |Closed| Open | Open |
   |--+-----+-------+-------+-------+------+------+------+------|
   |  |360h |Closed |Closed | Open  | Open |Closed| Open | Open |
   |--+-----+-------+-------+-------+------+------+------+------|
   |  |370h |Closed | Open  | Open  | Open |Closed| Open | Open |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    INTERRUPT SELECTION                     |
   |------------------------------------------------------------|
   | Setting |  B/2   |  B/3   |  B/4   |  B/5  |  B/6  |  B/7  |
   |---------+--------+--------+--------+-------+-------+-------|
   |  | IRQ2 | Closed |  Open  |  Open  | Open  | Open  | Open  |
   |--+------+--------+--------+--------+-------+-------+-------|
   |>> | IRQ3 |  Open  | Closed |  Open  | Open  | Open  | Open  |
   |--+------+--------+--------+--------+-------+-------+-------|
   |  | IRQ4 |  Open  |  Open  | Closed | Open  | Open  | Open  |
   |--+------+--------+--------+--------+-------+-------+-------|
   |  | IRQ5 |  Open  |  Open  |  Open  |Closed | Open  | Open  |
   |--+------+--------+--------+--------+-------+-------+-------|
   |  | IRQ6 |  Open  |  Open  |  Open  | Open  |Closed | Open  |
   |--+------+--------+--------+--------+-------+-------+-------|
   |  | IRQ7 |  Open  |  Open  |  Open  | Open  | Open  |Closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   | The SC499-2 is used with FasTape tape drive. The tape      |
   | drive cannot be used in EISA systems , 486 or 386 faster   |
   | than 25MHz.                                                |
   +------------------------------------------------------------+