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# NORTHGATE COMPUTER SYSTEMS, INC.
SLIMLINE SP
Processor 80386DX/80486DX
Processor Speed 25/33MHz
Chip Set VLSI
Max. Onboard 64MB
DRAM
Cache 64/256KB
BIOS AMI
Dimensions 350mm x 304mm
I/O Options Proprietary CPU/NPU module slot, parallel
port, serial ports (2), floppy drive
interface, IDE interface, VGA port
NPU Options 80387/3167/4167 (on external CPU/NPU card)
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Proprietary CPU | CPU1 | Serial port 1 | J9 |
| module | | | |
|---------------------+----------+----------------+----------|
| VGA port | J1 | Serial port 2 | J10 |
|---------------------+----------+----------------+----------|
| External battery | J2 | Parallel port | J15 |
| | | LPT1 | |
|---------------------+----------+----------------+----------|
| Turbo LED | J4 | Floppy drive | J16 |
| | | interface | |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J5 | IDE interface | J17 |
|---------------------+----------+----------------+----------|
| Reset switch | J6 | Speaker | J19 |
|---------------------+----------+----------------+----------|
| IDE interface LED | J8 | Riser card | R1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------------+-------------+------------|
| » | Floppy drive write precomp | W2 | pins 2 & 3 |
| | select alternate | | closed |
|---+-----------------------------+-------------+------------|
| | Floppy drive write precomp | W2 | pins 1 & 2 |
| | select normal | | closed |
|---+-----------------------------+-------------+------------|
| » | Factory configured - do not | W3 | N/A |
| | alter | | |
|---+-----------------------------+-------------+------------|
| » | Monitor type select | W4 | pins 1 & 2 |
| | monochrome | | closed |
|---+-----------------------------+-------------+------------|
| | Monitor type select color | W4 | pins 2 & 3 |
| | | | closed |
|---+-----------------------------+-------------+------------|
| » | CMOS memory normal | W8 | Open |
| | operation | | |
|---+-----------------------------+-------------+------------|
| | CMOS memory clear | W8 | Closed |
|---+-----------------------------+-------------+------------|
| » | Parallel port mode select | W13 | pins 2 & 3 |
| | bi-directional | | closed |
|---+-----------------------------+-------------+------------|
| | Parallel port mode select | W13 | pins 1 & 2 |
| | input only | | closed |
|---+-----------------------------+-------------+------------|
| » | Floppy drive mode select | W18 | pins 1 & 2 |
| | single speed | | closed |
|---+-----------------------------+-------------+------------|
| | Floppy drive mode select | W18 | pins 2 & 3 |
| | dual speed | | closed |
|---+-----------------------------+-------------+------------|
| » | Factory configured - do not | W27 | N/A |
| | alter | | |
|---+-----------------------------+-------------+------------|
| » | Factory configured - do not | W29 | N/A |
| | alter | | |
|---+-----------------------------+-------------+------------|
| » | Factory configured - do not | SW1 pins 1 | N/A |
| | alter | & 2 | |
|---+-----------------------------+-------------+------------|
| » | Factory configured - do not | SW1 pins 5 | N/A |
| | alter | & 6 | |
|---+-----------------------------+-------------+------------|
| » | VGA BIOS shadowing enabled | SW1 pins 11 | Closed |
| | | & 12 | |
|---+-----------------------------+-------------+------------|
| | VGA BIOS shadowing disabled | SW1 pins 11 | Open |
| | | & 12 | |
|---+-----------------------------+-------------+------------|
| » | BIOS shadowing enabled | SW1 pins 11 | Closed |
| | | & 12 | |
|---+-----------------------------+-------------+------------|
| | BIOS shadowing disabled | SW1 pins 11 | Open |
| | | & 12 | |
|---+-----------------------------+-------------+------------|
| » | IRQ6 enabled | SW2 pins 9 | Closed |
| | | & 10 | |
|---+-----------------------------+-------------+------------|
| | IRQ6 disabled | SW2 pins 9 | Open |
| | | & 10 | |
|---+-----------------------------+-------------+------------|
| » | Floppy drive interface | SW3 pins 1 | Open |
| | enabled | & 2 | |
|---+-----------------------------+-------------+------------|
| | Floppy drive interface | SW3 pins 1 | Closed |
| | disabled | & 2 | |
|------------------------------------------------------------|
| Note:The locations of W8 & W29 are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER/SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1 | W5 | W6 |
|----------+---------------------------+----------+----------|
| 1MB | 3 & 4, 17 & 18, 19 & 20 | 2 & 3 | 2 & 3 |
|----------+---------------------------+----------+----------|
| 2MB | 17 & 18, 19 & 20 | 2 & 3 | 2 & 3 |
|----------+---------------------------+----------+----------|
| 4MB | 3 & 4, 17 & 18 | 1 & 2 | 2 & 3 |
|----------+---------------------------+----------+----------|
| 8MB | 17 & 18 | 1 & 2 | 2 & 3 |
|----------+---------------------------+----------+----------|
| 16MB | 3 & 4 | 1 & 2 | 1 & 2 |
|----------+---------------------------+----------+----------|
| 32MB | Open | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| IDE CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW21 | W20 |
|--------------------+-------------------+-------------------|
| Enabled | Closed | Open |
|--------------------+-------------------+-------------------|
| Disabled | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT IRQ CONFIGURATION |
|------------------------------------------------------------|
| IRQ | SW2 |
|----------------------------+-------------------------------|
| IRQ5 | pins 5 & 6 closed |
|----------------------------+-------------------------------|
| IRQ7 | pins 7 & 8 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW3 |
|----------------------------+-------------------------------|
| LPT1/3BCh | pins 9 & 10 closed |
|----------------------------+-------------------------------|
| LPT1/378h | Open |
|----------------------------+-------------------------------|
| LPT2/278h | pins 7 & 8 closed |
|----------------------------+-------------------------------|
| Disabled | pins 7 & 8, 9 & 10 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW2 | SW3 |
|------------------+--------------------+--------------------|
| Enabled | pins 1 & 2 closed | Open |
|------------------+--------------------+--------------------|
| Disabled | Open | pins 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW2 | SW3 |
|------------------+--------------------+--------------------|
| Enabled | pins 3 & 4 closed | Open |
|------------------+--------------------+--------------------|
| Disabled | Open | pins 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW5 | W19 |
|----------+-----------------------------+-------------------|
| Enabled | pins 1 & 2, 3 & 4, 5 & 6 | pins 1 & 2 closed |
| | closed | |
|----------+-----------------------------+-------------------|
| Disabled | Open | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW1 |
|---------------------------------------+--------------------|
| F000-FFFF (VGA BIOS disabled) | pins 7 & 8, 9 & 10 |
| | closed |
|---------------------------------------+--------------------|
| F000-FFFF, E000-EFFF (VGA BIOS | pins 7 & 8 closed |
| disabled, BIOS shadowing enabled) | |
|---------------------------------------+--------------------|
| F000-FFFF VGA BIOS at C000-C7FF | pins 9 & 10 closed |
|---------------------------------------+--------------------|
| F000-FFFF VGA BIOS at C000-C7FF, IDE | pins 9 & 10 closed |
| interface at C800-CFFF | |
+------------------------------------------------------------+
IMG IMG 2
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 64KB | (8) 8K x 8 |
|----------------------------+-------------------------------|
| 256KB | (8) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W1 |
|----------------------------+-------------------------------|
| 64KB | Open |
|----------------------------+-------------------------------|
| 256KB | pins 1 & 2, 3 & 4 closed |
+------------------------------------------------------------+
IMG IMG 3
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | W3 | W4 | W5 |
|---------------+--------------+--------------+--------------|
| Burst mode | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| enabled | closed | closed | closed |
|---------------+--------------+--------------+--------------|
| Burst mode | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| enabled | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 64KB | (8) 8K x 8 |
|----------------------------+-------------------------------|
| 256KB | (8) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W1 | W2 | W5 |
|-------+------------+------------+--------------------------|
| 64KB | pins 1 & 2 | pins 1 & 2 | Open |
| | closed | closed | |
|-------+------------+------------+--------------------------|
| 256KB | pins 2 & 3 | pins 2 & 3 | pins 3 & 4, 5 & 6 closed |
| | closed | closed | |
+------------------------------------------------------------+