CHAINTECH COMPUTER COMPANY, LTD.
================================

   ML-757

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

<gopher://bitreich.org/I/th99/c/C-D/20857-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                    Function                     | Location |
   |-------------------------------------------------+----------|
   | 40-pin primary IDE(AT) connector                |    J1    |
   |-------------------------------------------------+----------|
   | 40-pin secondary IDE(AT) connector              |    J2    |
   |-------------------------------------------------+----------|
   | 34-pin cable connector - floppy drive           |    J3    |
   |-------------------------------------------------+----------|
   | 10-pin serial port 1 internal, 9-pin serial     |    J4    |
   | port 1 - external                               |          |
   |-------------------------------------------------+----------|
   | 10-pin serial port 2 - internal                 |    J5    |
   |-------------------------------------------------+----------|
   | 16-pin game port                                |    J6    |
   |-------------------------------------------------+----------|
   | 25-pin parallel port - external                 |    J7    |
   |-------------------------------------------------+----------|
   | 4-pin connector - drive active LED              |    J8    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              PARALLEL PORT ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |       LPT        |        JP13        |        JP14        |
   |------------------+--------------------+--------------------|
   |>> | LPT1 (378h)  | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   | LPT2 (278h)  | pins 2 & 3 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   | LPT3 (3BCh)  | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   Disabled   | pins 1 & 2 closed  | pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function              |   Location   | Setting |
   |-----------------------------------+--------------+---------|
   |>> | IDE(AT) interface enabled     | JP1/pins 1 & | closed  |
   |   |                               |      2       |         |
   |---+-------------------------------+--------------+---------|
   |   | IDE(AT) interface disabled    | JP1/pins 2 & | closed  |
   |   |                               |      3       |         |
   |---+-------------------------------+--------------+---------|
   |>> | Primary & secondary IDE       | JP2/pins 1 & | closed  |
   |   | enabled                       |      2       |         |
   |---+-------------------------------+--------------+---------|
   |   | Primary IDE enabled,          | JP2/pins 2 & | closed  |
   |   | secondary disabled            |      3       |         |
   |---+-------------------------------+--------------+---------|
   |>> | CPU clock is 40 or 50MHz      | JP3/pins 1 & | closed  |
   |   |                               |      2       |         |
   |---+-------------------------------+--------------+---------|
   |   | CPU clock <=33MHz             | JP3/pins 2 & | closed  |
   |   |                               |      3       |         |
   |---+-------------------------------+--------------+---------|
   |>> | Factory configured - do not   |     JP4      |   N/A   |
   |   | alter                         |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Factory configured - do not   |     JP5      |   N/A   |
   |   | alter                         |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Floppy drive order is normal  | JP6/pins 1 & | closed  |
   |   | (A:, B:)                      |      2       |         |
   |---+-------------------------------+--------------+---------|
   |   | Floppy drive order is         | JP6/pins 2 & | closed  |
   |   | reversed (B:, A:)             |      3       |         |
   |---+-------------------------------+--------------+---------|
   |>> | Floppy controller primary     | JP7/pins 1 & | closed  |
   |   | address is 3F0h               |      2       |         |
   |---+-------------------------------+--------------+---------|
   |   | Floppy controller secondary   | JP7/pins 2 & | closed  |
   |   | address is 370h               |      3       |         |
   |---+-------------------------------+--------------+---------|
   |>> | Floppy drive interface        | JP8/pins 1 & | closed  |
   |   | enabled                       |      2       |         |
   |---+-------------------------------+--------------+---------|
   |   | Floppy drive interface        | JP8/pins 2 & | closed  |
   |   | disabled                      |      3       |         |
   |---+-------------------------------+--------------+---------|
   |>> | Parallel port is              |     JP15     | closed  |
   |   | unidirectional                |              |         |
   |---+-------------------------------+--------------+---------|
   |   | Parallel port is              |     JP15     |  open   |
   |   | bi-directional                |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Parallel port IRQ 7 select    |   JP16/ 1    | closed  |
   |---+-------------------------------+--------------+---------|
   |   | Parallel port IRQ 5 select    |   JP16/ 2    | closed  |
   |---+-------------------------------+--------------+---------|
   |>> | Game port enabled             |     JP17     | closed  |
   |---+-------------------------------+--------------+---------|
   |   | Game port disabled            |     JP17     |  open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 1 ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |       COM        |        JP9         |        JP10        |
   |------------------+--------------------+--------------------|
   |>> | COM1 (3F8h)  | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   | COM3 (3E8h)  | pins 2 & 3 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   Disabled   | pins 2 & 3 closed  | pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 2 ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |       COM        |        JP11        |        JP12        |
   |------------------+--------------------+--------------------|
   |>> | COM2 (2F8h)  | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   | COM4 (2E8h)  | pins 2 & 3 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   Disabled   | pins 2 & 3 closed  | pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |          Pin 1 in jumper blocks is unidentified.           |
   +------------------------------------------------------------+