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# NEC TECHNOLOGIES, INC.
POWERMATE SX/20
Processor 80386SX
Processor Speed 20MHz
Video Processor Unidentified
Chipset NEC
Maximum Onboard 12MB DRAM (8MB on memory card, 2MB on
Memory memory module)
Maximum Video 256KB DRAM (exact location unidentified)
Memory
BIOS NEC
Dimensions 254 x 218mm
I/O Options 32-bit memory card slot (2), CPU card slot,
PS/2 mouse port, floppy drive interface,
IDE interface, parallel port, serial port,
VGA daughterboard header
NPU Options 80387SX
Video Types VGA
Supported
Highest Resolution 800 x 600
Supported
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| PS/2 mouse port | CN1 | Header to | CN8B |
| | | mainboard CN8A | |
|------------------+----------+-------------------+----------|
| Keyboard | CN2 | DC power out | CN9 |
| connector | | connector | |
|------------------+----------+-------------------+----------|
| VGA port | CN3 | DC power out | CN10 |
| | | connector | |
|------------------+----------+-------------------+----------|
| Serial port | CN4 | Speaker | CN11 |
|------------------+----------+-------------------+----------|
| Parallel port | CN5 | Front panel | CN12 |
| | | connector | |
|------------------+----------+-------------------+----------|
| IDE interface | CN6 | Memory module | CN13 |
| | | header | |
|------------------+----------+-------------------+----------|
| Floppy drive | CN7 | VGA card header | CN14 |
| interface | | | |
|------------------+----------+-------------------+----------|
| CPU card header | CN8A | 32-bit external | SL2 |
| | | memory card | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|--------------------------------------+--------+------------|
| » | Password normal operation | J1 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Password clear | J1 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | IDE interface enabled | J2 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IDE interface disabled | J2 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Serial port interrupt set to | J3 | Pins 2 & 3 |
| | IRQ4 | | closed |
|---+----------------------------------+--------+------------|
| | Serial port interrupt set to | J3 | Pins 1 & 2 |
| | IRQ3 | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | SW1/1 | On |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | SW1/1 | Off |
|---+----------------------------------+--------+------------|
| » | Floppy controller address set to | SW1/2 | On |
| | 370h | | |
|---+----------------------------------+--------+------------|
| | Floppy controller address set to | SW1/2 | Off |
| | 270h | | |
|---+----------------------------------+--------+------------|
| » | Floppy drive interface enabled | SW1/3 | On |
|---+----------------------------------+--------+------------|
| | Floppy drive interface disabled | SW1/3 | Off |
|---+----------------------------------+--------+------------|
| » | Serial port address set to 3F8h | SW1/4 | On |
| | (COM1:) | | |
|---+----------------------------------+--------+------------|
| | Serial port address set to 2F8h | SW1/4 | Off |
| | (COM2:) | | |
|---+----------------------------------+--------+------------|
| » | Serial port enabled | SW1/5 | On |
|---+----------------------------------+--------+------------|
| | Serial port disabled | SW1/5 | Off |
|---+----------------------------------+--------+------------|
| » | Parallel port enabled | SW1/6 | On |
|---+----------------------------------+--------+------------|
| | Parallel port disabled | SW1/6 | Off |
|---+----------------------------------+--------+------------|
| » | Keyboard D1 signal intercepted | SW1/7 | On |
|---+----------------------------------+--------+------------|
| | Keyboard D1 signal not | SW1/7 | Off |
| | intercepted | | |
|---+----------------------------------+--------+------------|
| » | Memory from 512KB to 640KB | SW1/9 | Off |
| | enabled | | |
|---+----------------------------------+--------+------------|
| | Memory from 512KB to 640KB | SW1/9 | On |
| | disabled | | |
|---+----------------------------------+--------+------------|
| » | Mouse port enabled | SW1/10 | On |
|---+----------------------------------+--------+------------|
| | Mouse port disabled | SW1/10 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ON-BOARD VIDEO CONFIGURATION |
|------------------------------------------------------------|
| Setting | J8 | SW1/8 |
|-----------------------+--------------------+---------------|
| » | Disabled | Pins 1 & 2 closed | Off |
|---+-------------------+--------------------+---------------|
| | Enabled | Pins 2 & 3 closed | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| There is 2MB of DRAM installed on the mainboard. This |
| memory is not configurable. |
+------------------------------------------------------------+
IMG IMG 2
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+--------+-----------|
| » | Factory configured - do not alter | SW1/5 | Off |
|---+-----------------------------------+--------+-----------|
| » | Factory configured - do not alter | SW1/6 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|--------+------------+------------+------------+------------|
| 2MB | (2) 1M x 9 | None | None | None |
|--------+------------+------------+------------+------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 | None | None |
|--------+------------+------------+------------+------------|
| 6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | None |
|--------+------------+------------+------------+------------|
| 8MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/1 | SW1/2 | SW1/3 | SW1/4 |
|-----------+------------+-----------+-----------+-----------|
| 2MB | On | Off | Off | Off |
|-----------+------------+-----------+-----------+-----------|
| 4MB | On | On | Off | Off |
|-----------+------------+-----------+-----------+-----------|
| 6MB | On | On | On | Off |
|-----------+------------+-----------+-----------+-----------|
| 8MB | On | On | On | On |
+------------------------------------------------------------+