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# MODULAR CIRCUIT TECHNOLOGY
MCT-VIO+
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 32-bit VL-bus |
|---------------+--------------------------------------------|
| Size: | Three-quarter length, half-height card |
|---------------+--------------------------------------------|
| Hard drive | Four IDE(AT) drives |
| supported: | |
|---------------+--------------------------------------------|
| Floppy drives | Four 360KB, 720KB, 1.2MB, 1.44MB, or |
| supported: | 2.88MB drives |
+------------------------------------------------------------+
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|-------------------------------------------------+----------|
| 34-pin control cable connector - primary floppy | CN1 |
| drive | |
|-------------------------------------------------+----------|
| 25-pin parallel port - external | CN2 |
|-------------------------------------------------+----------|
| 40-pin IDE(AT) Interface connector - primary | CN3 |
| drive | |
|-------------------------------------------------+----------|
| 4-pin connector - primary IDE drive active LED | CN4 |
|-------------------------------------------------+----------|
| 10-pin serial port 2 - internal | CN5 |
|-------------------------------------------------+----------|
| 9-pin serial port 1 - external/10-pin serial | CN6 |
| port 1 internal | |
|-------------------------------------------------+----------|
| 40-pin IDE (AT) Interface connector - secondary | CN7 |
| drive | |
|-------------------------------------------------+----------|
| 4-pin connector - secondary drive active LED | CN8 |
|-------------------------------------------------+----------|
| 34-pin control cable connector - secondary | CN9 |
| floppy drive | |
|-------------------------------------------------+----------|
| 16-pin game port - internal | CN10 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|------------------------------------+----------+------------|
| » | IOCHRDY signal disabled | J7 | Open |
|---+--------------------------------+----------+------------|
| | IOCHRDY signal enabled | J7 | Closed |
|---+--------------------------------+----------+------------|
| » | Floppy drive enable | J8 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | Floppy drive disable | J8 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| » | Floppy drive normal compatible | J16 | Pins 2 & 3 |
| | mode enabled | | closed |
|---+--------------------------------+----------+------------|
| | Floppy drive enhanced mode | J16 | Pins 1 & 2 |
| | enabled | | closed |
|---+--------------------------------+----------+------------|
| » | IDE(AT) interface enabled | J17 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | IDE(AT) interface disabled | J17 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| » | Floppy drive I/O address is | J26 | Pins 2 & 3 |
| | 3F0h | | closed |
|---+--------------------------------+----------+------------|
| | Floppy drive I/O address is | J26 | pins 1 & 2 |
| | 370h | | closed |
|---+--------------------------------+----------+------------|
| » | Game port enable | J37 | Closed |
|---+--------------------------------+----------+------------|
| | Game port disable | J37 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IDE CHANNEL AND ADDRESS CONFIGURATION |
|------------------------------------------------------------|
| Setting | J18 | J19 |
|----------------------------------+------------+------------|
| | Primary and secondary | Pins 1 & 2 | Pins 2 & 3 |
| | channels enabled | closed | closed |
|---+------------------------------+------------+------------|
| | Primary channel only enabled | Pins 2 & 3 | Pins 1 & 2 |
| | (170h) | closed | closed |
|---+------------------------------+------------+------------|
| » | Primary channel only enabled | Pins 2 & 3 | Pins 2 & 3 |
| | (1F0h) | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IDE WAIT STATE FOR VL-BUS CLOCK |
|------------------------------------------------------------|
| Setting | J20 | J21 | J22 |
|---------------------+------------+------------+------------|
| » | General setting | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 |
| | for all VL bus | closed | closed | closed |
| | clocks | | | |
|---+-----------------+------------+------------+------------|
| | <= 33 MHz VL | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 |
| | bus clock | closed | closed | closed |
|---+-----------------+------------+------------+------------|
| | > 33 MHz VL bus | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 |
| | clock | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY CHANNEL CONFIGURATION |
|------------------------------------------------------------|
| Setting | J4 | J5 | J6 |
|---------------------------------+--------+--------+--------|
| | Primary and secondary | Closed | Closed | Closed |
| | channels enabled | | | |
|----+----------------------------+--------+--------+--------|
| » | Primary channel enabled | Open | Open | Open |
|------------------------------------------------------------|
| Note: The primary and secondary option is invalid with ECP |
| mode. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT CONFIGURATION |
|------------------------------------------------------------|
| LPT | J9 | J27 |
|--------------------+-------------------+-------------------|
| » | LPT1 (378h) | Pins 2 & 3 closed | Pins 2 & 3 closed |
|---+----------------+-------------------+-------------------|
| | LPT2 (278h) | Pins 2 & 3 closed | Pins 1 & 2 closed |
|---+----------------+-------------------+-------------------|
| | LPT3 (3BCh) | Pins 1 & 2 closed | Pins 1 & 2 closed |
|---+----------------+-------------------+-------------------|
| | Disabled | Pins 1 & 2 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 CONFIGURATION |
|------------------------------------------------------------|
| COM | J10 | J11 |
|--------------------+-------------------+-------------------|
| » | COM1 (3F8h) | Pins 2 & 3 closed | Pins 2 & 3 closed |
|---+----------------+-------------------+-------------------|
| | COM2 (2F8h) | Pins 2 & 3 closed | Pins 1 & 2 closed |
|---+----------------+-------------------+-------------------|
| | COM3 (3E8h) | Pins 1 & 2 closed | Pins 2 & 3 closed |
|---+----------------+-------------------+-------------------|
| | Disabled | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 CONFIGURATION |
|------------------------------------------------------------|
| COM | J12 | J13 |
|--------------------+-------------------+-------------------|
| » | COM2 (2F8h) | Pins 2 & 3 closed | Pins 2 & 3 closed |
|---+----------------+-------------------+-------------------|
| | COM1 (3F8h) | Pins 1 & 2 closed | Pins 2 & 3 closed |
|---+----------------+-------------------+-------------------|
| | COM4 (2E8h) | Pins 2 & 3 closed | Pins 1 & 2 closed |
|---+----------------+-------------------+-------------------|
| | Disable | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT MODE CONFIGURATION |
|------------------------------------------------------------|
| Mode | J28 | J29 |
|--------------------+-------------------+-------------------|
| » | Printer | Pins 2 & 3 closed | Pins 2 & 3 closed |
|---+----------------+-------------------+-------------------|
| | EPP & Printer | Pins 1 & 2 closed | Pins 2 & 3 closed |
|---+----------------+-------------------+-------------------|
| | ECP | Pins 2 & 3 closed | Pins 1 & 2 closed |
|---+----------------+-------------------+-------------------|
| | EPP & ECP | Pins 1 & 2 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ECP DMA SELECTION |
|------------------------------------------------------------|
| Channel | J38 | J39 | J40 | J41 | J42 |
|-----------+---------+---------+---------+---------+--------|
| DMA 1 | Closed | Open | Open | Closed | Closed |
|-----------+---------+---------+---------+---------+--------|
| DMA 3 | Closed | Closed | Closed | Open | Open |
|-----------+---------+---------+---------+---------+--------|
| Disabled | Open | Open | Open | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT INTERRUPT SELECTION |
|------------------------------------------------------------|
|Serial Port 1|Serial Port| J32 | J33 | J34 |J35 |
| | 2 | | | | |
|-------------+-----------+---------+---------+---------+----|
| | No | No | Open | Open | Open |Open|
| |Interrupt | Interrupt | | | | |
|--+----------+-----------+---------+---------+---------+----|
| | No | IRQ 3 | Open | Closed | Open |Open|
| |Interrupt | | | | | |
|--+----------+-----------+---------+---------+---------+----|
| | No | IRQ 4 | Open |J33/pin 1| Open | |
| |Interrupt | | | to | | |
| | | | |J34/pin 1| | |
|--+----------+-----------+---------+---------+---------| |
| | No | IRQ 5 |J32/pin 1| Open | Open | |
| |Interrupt | | to | | | |
| | | |J33/pin 1| | | |
|--+----------+-----------+---------+---------+---------| |
| | IRQ 3 | No | Open |J33/pin 2| Open | |
| | | Interrupt | | to | | |
| | | | |J34/pin 2| | |
|--+----------+-----------+---------+---------+---------| |
|» | IRQ3 | IRQ 4 | Open |J33/pin 1| Open | |
| | | | | to | | |
| | | | |J34/pin 1| | |
| | | | | | | |
| | | | |J33/pin 2| | |
| | | | | to | | |
| | | | |J34/pin 2| | |
|--+----------+-----------+---------+---------+---------+ |
| | IRQ3 | IRQ5 |J32/pin 1| Open | |
| | | | to | | |
| | | |J33/pin1 | | |
| | | | | | |
| | | |J33/pin 2| | |
| | | | to | | |
| | | |J34/pin 2| | |
|--+----------+-----------+---------+---------+--------------|
| | IRQ4 | No | Open | Open | Closed |Open|
| | | Interrupt | | | | |
|--+----------+-----------+---------+---------+---------+----|
| | IRQ4 | IRQ3 | Open | Closed | Closed |Open|
|--+----------+-----------+---------+---------+---------+----|
| | IRQ4 | IRQ5 |J32/pin 1| Closed | Open | |
| | | | to | | | |
| | | |J33/pin 1| | | |
|--+----------+-----------+---------+---------+---------| |
| | IRQ5 | No | Open | Open |J34/pin 2| |
| | | Interrupt | | | to | |
| | | | | |J35/pin 2| |
|--+----------+-----------+---------+---------+---------| |
| | IRQ5 | IRQ3 | Open | Closed |J34/pin 2| |
| | | | | | to | |
| | | | | |J35/pin 2| |
|--+----------+-----------+---------+---------+---------+ |
| | IRQ5 | IRQ4 | Open |J33/pin 1| |
| | | | | to | |
| | | | |J34/pin 1| |
| | | | | | |
| | | | |J34/pin 2| |
| | | | | to | |
| | | | |P35/pin 2| |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | J35 | J36 |
|-------------------------+-----------------+----------------|
| | IRQ5 | Closed | Open |
|---+---------------------+-----------------+----------------|
| » | IRQ7 | Open | Closed |
|---+---------------------+-----------------+----------------|
| | No Interrupt | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| Jumper J35 serves multiple functions so it appears in both |
| serial port and parallel port interrupt selection tables. |
+------------------------------------------------------------+