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# NORTHGATE COMPUTER SYSTEMS, INC.
SLIMLINE ZXP
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor 16/20/25/33/50 (Internal)/66 (Internal)MHz
Speed
Chip Set OPTI
Max. onboard 128MB
DRAM
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, IDE interface, parallel
port,
riser card, serial ports (2), VGA port
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------------+----------+---------------+----------|
| Parallel port | CN1 | Turbo LED | P1 |
|----------------------+----------+---------------+----------|
| Serial port (COM1) | CN2 | Power LED & | P2 |
| | | keylock | |
|----------------------+----------+---------------+----------|
| Serial port (COM2) | CN3 | Speaker | P3 |
|----------------------+----------+---------------+----------|
| VGA port | CN4 | IDE interface | P4 |
| | | LED | |
|----------------------+----------+---------------+----------|
| IDE interface | CN5 | Reset switch | P5 |
|----------------------+----------+---------------+----------|
| Floppy drive | CN6 | Riser Card | S1 |
| interface | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|---------------------------------+---------------+----------|
| » | Onboard video disabled | J5 | Closed |
|---+-----------------------------+---------------+----------|
| | Onboard video enabled | J5 | Open |
|---+-----------------------------+---------------+----------|
| » | Monitor type select color | J11 | Closed |
|---+-----------------------------+---------------+----------|
| | Monitor type select | J11 | Open |
| | monochrome | | |
|---+-----------------------------+---------------+----------|
| » | Parallel port select | J12 | Closed |
| | uni-directional (printer) | | |
|---+-----------------------------+---------------+----------|
| | Parallel port select | J12 | Open |
| | bi-directional | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 5MB | (4) 1M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 17MB | (4) 4M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 64MB | (4) 16M x 9 | NONE |
|------------------+--------------------+--------------------|
| 65MB | (4) 16M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 68MB | (4) 16M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 80MB | (4) 16M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 128MB | (4) 16M x 9 | (4) 16M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (8) 8K x 8 | Banks 0 & 1 |
|------------------+--------------------+--------------------|
| 1024KB | (4) 32K x 8 | Bank 0 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J6 | J7 |
|--------------------+-------------------+-------------------|
| 512KB | On | Off |
|--------------------+-------------------+-------------------|
| 1024KB | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | J8 | J9 | J10 |
|---------+----------------+----------------+----------------|
| 16MHz | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 20MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 25MHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 33MHz | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 50i MHz | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 66i MHz | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Speed | J1 | J2 | J3 | J4 |
|----------+--------+--------------+------------+------------|
| 80486SX | Open | Open | Open | Open |
|----------+--------+--------------+------------+------------|
| 80487SX | Closed | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
|----------+--------+--------------+------------+------------|
| 80486DX | Closed | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed | closed |
|----------+--------+--------------+------------+------------|
| ODP486SX | Closed | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
|----------+--------+--------------+------------+------------|
| 80486DX2 | Closed | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed | closed |
+------------------------------------------------------------+