TYAN COMPUTER CORPORATION
=========================

   VL IDE & I/O CONTROLLER

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

<gopher://bitreich.org/I/th99/c/S-T/20375-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                   Function                    |  Location  |
   |-----------------------------------------------+------------|
   | 10-pin serial port (COM1/3/4) - external      |    CN1     |
   |-----------------------------------------------+------------|
   | 25-pin parallel port (LPT1/2/3) - external    |    CN2     |
   |-----------------------------------------------+------------|
   | 40-pin IDE(AT) Interface connector            |    JP4     |
   |-----------------------------------------------+------------|
   | 34-pin control cable connector - floppy drive |    JP6     |
   |-----------------------------------------------+------------|
   | 10-pin serial port (COM2/3/4) - internal      |    JP8     |
   |-----------------------------------------------+------------|
   | 15-pin game port - internal                   |    JP9     |
   |-----------------------------------------------+------------|
   | 4-pin connector - Drive active LED            |    JP20    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Floppy drive enabled           |    J1    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive disabled          |    J1    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Hard drive port address is     |    J2    | pins 2 & 3 |
   |   | 1F0-1F7h                       |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Hard drive port address is     |    J2    | pins 1 & 2 |
   |   | 170-177h                       |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy drive booting sequence  |    J3    | pins 2 & 3 |
   |   | is A:/B:                       |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive booting sequence  |    J3    | pins 1 & 2 |
   |   | is B:/A:                       |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Hard drive enabled             |    J4    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Hard drive disabled            |    J4    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Hard drive port address is     |    J5    | pins 2 & 3 |
   |   | 1F0-1F7, 3F0-3F7h              |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Hard drive port address is     |    J5    | pins 1 & 2 |
   |   | 170-177, 370-377h              |          |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Game Port (CN6) enabled        |   J12    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Game Port (CN6) disabled       |   J12    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Local bus clock speed 33 MHz   |   J16    | pins 2 & 3 |
   |   | or 50 MHz                      |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Local bus clock speed 25 MHz   |   J16    | pins 1 & 2 |
   |   | or 40 MHz                      |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Single hard drive supported    |   JP5    |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Two hard drives supported      |   JP5    |    open    |
   |---+--------------------------------+----------+------------|
   |>> | Parallel port is               |   JP7    |   closed   |
   |   | bi-directional                 |          |            |
   |---+--------------------------------+----------+------------|
   |   | Parallel port is               |   JP7    |    open    |
   |   | uni-directional                |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Hard drive Interrupt IRQ14     |   JP10   |   closed   |
   |   | enabled                        |          |            |
   |---+--------------------------------+----------+------------|
   |   | Hard drive Interrupt IRQ14     |   JP10   |    open    |
   |   | disabled                       |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Serial Port 2 (JP8) Interrupt  |   JP11   |   closed   |
   |   | IRQ3 enabled                   |          |            |
   |---+--------------------------------+----------+------------|
   |   | Serial Port 2 (JP8) Interrupt  |   JP11   |    open    |
   |   | IRQ3 disabled                  |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Serial Port 1 (CN1) Interrupt  |   JP12   |   closed   |
   |   | IRQ4 enabled                   |          |            |
   |---+--------------------------------+----------+------------|
   |   | Serial Port 1 (CN1) Interrupt  |   JP12   |    open    |
   |   | IRQ4 disabled                  |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Floppy drive Interrupt IRQ6    |   JP13   |   closed   |
   |   | enabled                        |          |            |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive Interrupt IRQ6    |   JP13   |    open    |
   |   | disabled                       |          |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             PARALLEL PORT (CN2) CONFIGURATION              |
   |------------------------------------------------------------|
   |         LPT         |        J6         |        J7        |
   |---------------------+-------------------+------------------|
   |>> | LPT1 (378-37Fh) | pins 2 & 3 closed |    pins 2 & 3    |
   |   |                 |                   |      closed      |
   |---+-----------------+-------------------+------------------|
   |   | LPT2 (278-27Fh) | pins 1 & 2 closed |    pins 1 & 2    |
   |   |                 |                   |      closed      |
   |---+-----------------+-------------------+------------------|
   |   | LPT3 (3BC-3BEh) | pins 2 & 3 closed |    pins 1 & 2    |
   |   |                 |                   |      closed      |
   |---+-----------------+-------------------+------------------|
   |   |    Disabled     | pins 1 & 2 closed |    pins 2 & 3    |
   |   |                 |                   |      closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 1 (CN1) CONFIGURATION              |
   |------------------------------------------------------------|
   |         COM         |        J8         |        J9        |
   |---------------------+-------------------+------------------|
   |>> | COM1 (3F8-3FFh) | pins 2 & 3 closed |    pins 2 & 3    |
   |   |                 |                   |      closed      |
   |---+-----------------+-------------------+------------------|
   |   | COM3 (3E8-3EFh) | pins 1 & 2 closed |    pins 1 & 2    |
   |   |                 |                   |      closed      |
   |---+-----------------+-------------------+------------------|
   |   | COM4 (2E8-2EFh) | pins 2 & 3 closed |    pins 1 & 2    |
   |   |                 |                   |      closed      |
   |---+-----------------+-------------------+------------------|
   |   |    Disabled     | pins 1 & 2 closed |    pins 2 & 3    |
   |   |                 |                   |      closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 2 (JP8) CONFIGURATION              |
   |------------------------------------------------------------|
   |         COM         |        J10        |       J11        |
   |---------------------+-------------------+------------------|
   |>> | COM2 (2F8-2FFh) | pins 2 & 3 closed |    pins 2 & 3    |
   |   |                 |                   |      closed      |
   |---+-----------------+-------------------+------------------|
   |   | COM3 (3E8-3EFh) | pins 2 & 3 closed |    pins 1 & 2    |
   |   |                 |                   |      closed      |
   |---+-----------------+-------------------+------------------|
   |   | COM4 (2E8-2EFh) | pins 1 & 2 closed |    pins 1 & 2    |
   |   |                 |                   |      closed      |
   |---+-----------------+-------------------+------------------|
   |   |    Disabled     | pins 1 & 2 closed |    pins 2 & 3    |
   |   |                 |                   |      closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  HARD DRIVE TIMING OPTION                  |
   |------------------------------------------------------------|
   |        Function        |        J15         |     JP17     |
   |------------------------+--------------------+--------------|
   |>> | VESA mode enabled  | pins 2 & 3 closed  |     open     |
   |---+--------------------+--------------------+--------------|
   |   | ISA mode enabled   | pins 1 & 2 closed  |    closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |           PARALLEL PORT (CN2) INTERRUPT REQUEST            |
   |------------------------------------------------------------|
   |           IRQ           |      JP14       |      JP15      |
   |-------------------------+-----------------+----------------|
   |     |         5         |     closed      |      open      |
   |-----+-------------------+-----------------+----------------|
   |     |         7         |      open       |     closed     |
   |-----+-------------------+-----------------+----------------|
   |>>   |     Disabled      |      open       |      open      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |             Jumpers JP16 & JP18 are not used.              |
   +------------------------------------------------------------+