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# MONOLITHIC SYSTEMS, INC. (COLORADO MSI)
MICROPAQ 452 REV. B
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 16-bit, ISA |
|-------------------+----------------------------------------|
| Size: | Full-length, full-height card |
|-------------------+----------------------------------------|
| Hard drive | Two IDE (AT) Interface drives |
| supported: | |
|-------------------+----------------------------------------|
| Floppy drives | Two 360KB, 720KB, 1.2MB, or 1.44MB |
| supported: | drives |
+------------------------------------------------------------+
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|-----------------------------------------------+------------|
| 40-pin IDE(AT) Interface connector | J1 |
|-----------------------------------------------+------------|
| 34-pin control cable connector - floppy drive | J2 |
|-----------------------------------------------+------------|
| 26-pin parallel port (LPT1/2/3) - internal | J3 |
|-----------------------------------------------+------------|
| 10-pin serial port 1 (COM1/2/3/4) - internal | J4 |
|-----------------------------------------------+------------|
| 10-pin serial port 2 (COM1/2/3/4) - internal | J5 |
|-----------------------------------------------+------------|
| 4-pin connector - Drive active LED | J6 |
|-----------------------------------------------+------------|
| 28-pin VESA(VGA) feature connector - internal | J7 |
|-----------------------------------------------+------------|
| 26-pin VESA(EGA) feature connector - internal | J11 |
|-----------------------------------------------+------------|
| 15-pin analog VGA port - external | J13 |
|-----------------------------------------------+------------|
| 9-pin digital EGA port- external | J21 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|---------------------------------------+----------+---------|
| » | Pin 34 on IDE interface grounded | J10 | closed |
|---+-----------------------------------+----------+---------|
| | Pin 34 on IDE interface not | J10 | open |
| | grounded | | |
|---+-----------------------------------+----------+---------|
| » | Floppy drive precompensation is | J12 | open |
| | 125ns | | |
|---+-----------------------------------+----------+---------|
| | Floppy drive precompensation is | J12 | closed |
| | 187ns | | |
|---+-----------------------------------+----------+---------|
| » | Hard drive enabled | J14 | closed |
|---+-----------------------------------+----------+---------|
| | Hard drive disabled | J14 | open |
|---+-----------------------------------+----------+---------|
| » | On-board video enabled | J15 | closed |
|---+-----------------------------------+----------+---------|
| | On-board video disabled | J15 | open |
|---+-----------------------------------+----------+---------|
| » | Floppy drive Interrupt IRQ6 | J16 | closed |
| | enabled | | |
|---+-----------------------------------+----------+---------|
| | Floppy drive Interrupt IRQ6 | J16 | open |
| | disabled | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|------------------------------------+----------+------------|
| » | Single speed floppy drives | J17 | open |
| | supported | | |
|---+--------------------------------+----------+------------|
| | Dual speed floppy drives | J17 | closed |
| | supported | | |
|---+--------------------------------+----------+------------|
| » | 16-bit video bus enabled | J18 | open |
|---+--------------------------------+----------+------------|
| | 8-bit video bus enabled | J18 | closed |
|---+--------------------------------+----------+------------|
| » | Floppy drive change signal | J19 | closed |
| | sense enabled | | |
|---+--------------------------------+----------+------------|
| | Floppy drive change signal | J19 | open |
| | sense disabled | | |
|---+--------------------------------+----------+------------|
| » | VGA clock enabled (normal | J22 | pins 1 & 2 |
| | operation) | | closed |
|---+--------------------------------+----------+------------|
| | Feature connector clock | J22 | pins 2 & 3 |
| | enabled | | closed |
|---+--------------------------------+----------+------------|
| » | Hard drive Interrupt IRQ14 | J24 | closed |
| | enabled | | |
|---+--------------------------------+----------+------------|
| | Hard drive Interrupt IRQ14 | J24 | open |
| | disabled | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IDE IOCHRDY PIN SELECTION | |
|-------------------------------------------------------| |
| Function | J8 | J9 | |
|--------------------------------+-----------+----------| |
| » | IDE IOCHRDY from IDE pin | off | on | |
| | 21 enabled | | | |
|---+----------------------------+-----------+----------| |
| | IDE IOCHRDY from IDE pin | on | off | |
| | 27 enabled | | | |
|---+--------------------------------------------------------|
| | Pin 21 setting is for Seagate, CDC, Imprimis, and |
| | Miniscribe hard drives. Pin 27 setting is for Quantum |
| | hard drives. Conner and WD hard drives ignore the |
| | setting of these switches. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 CONFIGURATION |
|------------------------------------------------------------|
| COM |S1/switch 1 |S1/switch 2|S1/switch 3|S1/switch 4|
|-----------+------------+-----------+-----------+-----------|
|»| 1 | on | off | off | off |
|-+---------+------------+-----------+-----------+-----------|
| | 2 | off | on | off | off |
|-+---------+------------+-----------+-----------+-----------|
| | 3 | off | off | on | off |
|-+---------+------------+-----------+-----------+-----------|
| | 4 | off | off | off | on |
|-+---------+------------+-----------+-----------+-----------|
| |Disabled | off | off | off | off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 (J4) INTERRUPT REQUEST |
|------------------------------------------------------------|
| IRQ | S1/switch 5 | S1/switch 6 |
|--------------------+-------------------+-------------------|
| » | 3 | on | off |
|---+----------------+-------------------+-------------------|
| | 4 | off | on |
|---+----------------+-------------------+-------------------|
| | Disabled | off | off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT (J3) CONFIGURATION - S2 |
|------------------------------------------------------------|
| LPT | S2/switch 1 | S2/switch 2 | S2/switch 3 |
|---------------+--------------+--------------+--------------|
| » | 1 | on | off | off |
|---+-----------+--------------+--------------+--------------|
| | 2 | off | on | off |
|---+-----------+--------------+--------------+--------------|
| | 3 | off | off | on |
|---+-----------+--------------+--------------+--------------|
| | Disabled | off | off | off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT (J3) INTERRUPT REQUEST |
|------------------------------------------------------------|
| IRQ | S2/switch 5 | S2/switch 6 |
|--------------------+-------------------+-------------------|
| » | 7 | off | on |
|---+----------------+-------------------+-------------------|
| | 5 | on | off |
|---+----------------+-------------------+-------------------|
| | Disabled | off | off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 CONFIGURATION |
|------------------------------------------------------------|
| COM |S3/switch 1 |S3/switch 2|S3/switch 3|S3/switch 4|
|-----------+------------+-----------+-----------+-----------|
|»| 1 | on | off | off | off |
|-+---------+------------+-----------+-----------+-----------|
| | 2 | off | on | off | off |
|-+---------+------------+-----------+-----------+-----------|
| | 3 | off | off | on | off |
|-+---------+------------+-----------+-----------+-----------|
| | 4 | off | off | off | on |
|-+---------+------------+-----------+-----------+-----------|
| |Disabled | off | off | off | off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 (J5) INTERRUPT REQUEST |
|------------------------------------------------------------|
| IRQ | S3/switch 5 | S3/switch 6 |
|--------------------+-------------------+-------------------|
| » | 4 | off | on |
|---+----------------+-------------------+-------------------|
| | 3 | on | off |
|---+----------------+-------------------+-------------------|
| | Disabled | off | off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO DISPLAY CONFIGURATION ||
|-----------------------------------------------------------||
| Primary Adapter | Secondary |JP20 |S4/1|S4/2|S4/3|S4/4||
| | Adapter | | | | | ||
|-----------------+---------------+-----+----+----+----+----||
| | *Monochrome |EGA w/CGA 40 x |1 & 2| on | on | on | on ||
| | | 25 | | | | | ||
|-+---------------+---------------+-----+----+----+----+----||
| | *Monochrome |EGA w/CGA 80 x |1 & 2|off | on | on | on ||
| | | 25 | | | | | ||
|-+---------------+---------------+-----+----+----+----+----||
| | *Monochrome | EGA w/EGA 200 |1 & 2| on |off | on | on ||
| | | line | | | | | ||
|-+---------------+---------------+-----+----+----+----+----||
| | *Monochrome | EGA w/EGA 350 |1 & 2|off |off | on | on ||
| | | line | | | | | ||
|-+---------------+---------------+-----+----+----+----+----||
| | *CGA 40 x 25 | EGA |2 & 3| on | on |off | on ||
| | | w/monochrome | | | | | ||
|-+---------------+---------------+-----+----+----+----+----||
| | *CGA 80 x 25 | EGA |2 & 3|off | on |off | on ||
| | | w/monochrome | | | | | ||
|-+---------------+---------------+-----+----+----+----+----||
| |EGA w/CGA 40 x |*Monochrome or |1 & 2| on |off |off | on ||
| | 25 | none | | | | | ||
|-+---------------+---------------+-----+----+----+----+----||
| |EGA w/CGA 80 x |*Monochrome or |1 & 2|off |off |off | on ||
| | 25 | none | | | | | ||
|-+---------------+---------------+-----+----+----+----+----||
| | EGA w/EGA 200 |*Monochrome or |1 & 2| on | on | on |off ||
| | line | none | | | | | ||
|-+---------------+---------------+-----+----+----+----+----||
|»| EGA w/EGA 350 |*Monochrome or |1 & 2|off | on | on |off ||
| | line | none | | | | | ||
|-+---------------+---------------+-----+----+----+----+----||
| | EGA |*CGA 40 x 25 or|2 & 3| on |off | on |off ||
| | w/monochrome | none | | | | | ||
|-+---------------+---------------+-----+----+----+----+----||
| | EGA |*CGA 80 x 25 or|2 & 3|off |off | on |off ||
| | w/monochrome | none | | | | | ||
|-+---------------+---------------+-------------------------+|
| |VGA enable (all|S4/switch 5 on | |
| | other modes | | |
| | disabled) | | |
|-+---------------+---------------| |
| |All other modes|S4/switch 5 off| |
| | enable (VGA | | |
| |mode disabled) | | |
|-+----------------------------------------------------------|
| |For JP20 pins designated should be in a closed position. |
| | |
| |When VGA mode is enabled, the settings of JP20 and |
| |S4/switch 1 - 4 are ignored. |
| | |
| |The options with a (*) in front of them require an add-on |
| |card to function. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| The function of S2/switch 4 is undocumented. |
| |
| All other jumpers are for factory tests and should remain |
| factory-configured. |
+------------------------------------------------------------+