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# TRIGEM MICROSYSTEM, INC.
486/MV
Device Type Mainboard
Processor 80486SX/80486DX/80486DX2
Processor Speed 25/33/50(internal)/66(internal)MHz
Chip Set Unidentified
Video Chip Set Unidentified
Maximum Onboard 40MB
Memory
Maximum Video 1MB
Memory
Cache 64/128/256KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slot, floppy drive
interface, IDE interface, parallel port, PS/2
mouse port, serial ports (2), riser slot
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Parallel port | CN1 | Floppy drive | CN5 |
| | | interface | |
|------------------+----------+-------------------+----------|
| Serial port | CN2 | IDE interface | CN6 |
|------------------+----------+-------------------+----------|
| Serial port | CN3 | Riser slot | SL1 |
|------------------+----------+-------------------+----------|
| PS/2 mouse port | CN4 | 32-bit VESA local | SL2 |
| | | bus slot | |
|------------------------------------------------------------|
| Note: CN1 – CN6 are for general location purposes. The |
| location may not be exact. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | C1 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | C2 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J2 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J8 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J9 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | J10 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | J10 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J11 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Password enabled | SW1/4 | Off |
|---+---------------------------------+-------+--------------|
| | Password disabled | SW1/4 | On |
|---+---------------------------------+-------+--------------|
| » | Monitor type select color | SW1/5 | On |
|---+---------------------------------+-------+--------------|
| | Monitor type select monochrome | SW1/5 | Off |
|---+---------------------------------+-------+--------------|
| » | Cache disabled | SW1/6 | Off |
|---+---------------------------------+-------+--------------|
| | Cache enabled | SW1/6 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+---------+--------------+-------------+-------------|
| 4MB | 4MB | None | None | None |
|-------+---------+--------------+-------------+-------------|
| 8MB | 4MB | (1) 1M x 36 | None | None |
|-------+---------+--------------+-------------+-------------|
| 12MB | 4MB | (1) 1M x 36 | (1) 1M x 36 | None |
|-------+---------+--------------+-------------+-------------|
| 16MB | 4MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 |
|-------+---------+--------------+-------------+-------------|
| 20MB | 4MB | (1) 4M x 36 | None | None |
|-------+---------+--------------+-------------+-------------|
| 24MB | 4MB | (1) 1M x 36 | (1) 4M x 36 | None |
|-------+---------+--------------+-------------+-------------|
| 36MB | 4MB | (1) 4M x 36 | (1) 4M x 36 | None |
|-------+---------+--------------+-------------+-------------|
| 40MB | 4MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x 36 |
|------------------------------------------------------------|
| Note: Bank 0 is factory installed and is not configurable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | Unidentified |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | None | Unidentified |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | Unidentified |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J4 | J5 | J6 | J7 |
|-------+-------------+------------+------------+------------|
| None | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 64KB | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 128KB | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 256KB | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Note: Board accepts 512KB/1MB of video memory. The |
| location and chip sizes are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | SW1/1 | SW1/2 | SW1/3 |
|---------------+--------------+--------------+--------------|
| 25MHz | Off | Off | On |
|---------------+--------------+--------------+--------------|
| 33MHz | On | On | Off |
|---------------+--------------+--------------+--------------|
| 50iMHz | Off | Off | On |
|---------------+--------------+--------------+--------------|
| 66iMHz | On | On | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | J1 |
|----------------------------+-------------------------------|
| 80486SX | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 80486DX | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 80486DX2 | Pins 1 & 2 closed |
+------------------------------------------------------------+