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# NORTHGATE COMPUTER SYSTEMS, INC.
SLIMLINE CACHE 386SX
Processor 80386SX
Processor Speed 16/20MHz
Chip Set VLSI
Max. Onboard 8MB
DRAM
Cache 64KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, IDE interface,
parallel port, serial ports (2), VGA port
NPU Options 80387SX
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| VGA port | J1 | Serial port 2 | J10 |
|-------------------+----------+------------------+----------|
| Turbo LED | J3 | Parallel port | J15 |
| | | LPT1 | |
|-------------------+----------+------------------+----------|
| Power LED & | J4 | Floppy drive | J16 |
| keylock | | interface | |
|-------------------+----------+------------------+----------|
| Speaker | J5 | IDE interface | J17 |
|-------------------+----------+------------------+----------|
| Reset switch | J6 | Riser card | R1 |
|-------------------+----------+------------------+----------|
| IDE interface LED | J8 | Turbo switch | W6 |
|-------------------+----------+------------------+----------|
| Serial port 1 | J9 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------------+---------------+----------|
| » | Factory configured - do not | SW1/1 & 2 | Open |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Factory configured - do not | SW2/3 & 4 | Open |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Factory configured - do not | SW21 & 2 | N/A |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Floppy drive interface | SW2/pins 11 & | Open |
| | interrupt (IRQ6) enabled | 12 | |
|---+-----------------------------+---------------+----------|
| | Floppy drive interface | SW2/pins 11 & | Closed |
| | interrupt (IRQ6) disabled | 12 | |
|---+-----------------------------+---------------+----------|
| » | Floppy drive interface | SW2/pins 13 & | Open |
| | DMARQ2 enabled | 14 | |
|---+-----------------------------+---------------+----------|
| | Floppy drive interface | SW2/pins 13 & | Closed |
| | DMARQ2 disabled | 14 | |
|---+-----------------------------+---------------+----------|
| » | Floppy drive interface | SW2/pins 15 & | Open |
| | DACK2 enabled | 16 | |
|---+-----------------------------+---------------+----------|
| | Floppy drive interface | SW2/pins 15 & | Closed |
| | DACK2 disabled | 16 | |
|---+-----------------------------+---------------+----------|
| » | Floppy drive interface | SW3/pins 1 & | Open |
| | enabled | 2 | |
|---+-----------------------------+---------------+----------|
| | Floppy drive interface | SW3/pins 1 & | Closed |
| | disabled | 2 | |
|---+-----------------------------+---------------+----------|
| » | Factory configured - do not | SW3/pins 5 & | Open |
| | alter | 6 | |
|---+-----------------------------+---------------+----------|
| » | Factory configured - do not | W1 | Closed |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | Cache enabled | W2 | Closed |
|---+-----------------------------+---------------+----------|
| | Cache disabled | W2 | Open |
|---+-----------------------------+---------------+----------|
| » | Memory (8-bit) speed select | W3 | pins 2 & |
| | 4 wait states | | 3 closed |
|---+-----------------------------+---------------+----------|
| | Memory (8-bit) speed select | W3 | pins 1 & |
| | 6 wait states | | 2 closed |
|---+-----------------------------+---------------+----------|
| » | Memory (16-bit) speed | W4 | pins 2 & |
| | select 1 wait states | | 3 closed |
|---+-----------------------------+---------------+----------|
| | Memory (16-bit) speed | W4 | pins 1 & |
| | select 2 wait states | | 2 closed |
|---+-----------------------------+---------------+----------|
| » | BIOS type select 27256 | W5 | pins 2 & |
| | | | 3 closed |
|---+-----------------------------+---------------+----------|
| | BIOS type select 27512 | W5 | pins 1 & |
| | | | 2 closed |
|---+-----------------------------+---------------+----------|
| | Monitor type select | W7 | pins 1 & |
| | monochrome | | 2 closed |
|---+-----------------------------+---------------+----------|
| | Monitor type select color | W7 | pins 2 & |
| | | | 3 closed |
|---+-----------------------------+---------------+----------|
| » | Parallel port (J2) mode | W11 | pins 2 & |
| | select output only | | 3 closed |
|---+-----------------------------+---------------+----------|
| | Parallel port (J2) mode | W11 | pins 1 & |
| | select bi-directional | | 2 closed |
|---+-----------------------------+---------------+----------|
| » | Floppy drive write precomp | W17 | pins 2 & |
| | select standard | | 3 closed |
|---+-----------------------------+---------------+----------|
| | Floppy drive write precomp | W17 | pins 1 & |
| | select two speed drive | | 2 closed |
|---+-----------------------------+---------------+----------|
| » | Floppy drive type select | W18 | pins 1 & |
| | standard | | 2 closed |
|---+-----------------------------+---------------+----------|
| | Floppy drive type select | W18 | pins 2 & |
| | two speed drive | | 3 closed |
|---+-----------------------------+---------------+----------|
| » | IDE interface enabled | W20 | Open |
|---+-----------------------------+---------------+----------|
| | IDE interface disabled | W20 | Closed |
|---+-----------------------------+---------------+----------|
| » | IDE interface interrupt | W21 | Open |
| | (IRQ4) enabled | | |
|---+-----------------------------+---------------+----------|
| | IDE interface interrupt | W21 | Closed |
| | disabled | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank | Socket | Socket |
| | | | | 3 | U71 | U76 |
|-------+--------+--------+--------+-------+--------+--------|
| 512KB | (2) | NONE | NONE | NONE | PAL B | PAL B |
| | 256K x | | | | | |
| | 9 | | | | | |
|-------+--------+--------+--------+-------+--------+--------|
| 1MB | (2) | (2) | NONE | NONE | PAL B | PAL B |
| | 256K x | 256K x | | | | |
| | 9 | 9 | | | | |
|-------+--------+--------+--------+-------+--------+--------|
| 2MB | (2) 1M | NONE | NONE | NONE | PAL A | PAL A |
| | x 9 | | | | | |
|-------+--------+--------+--------+-------+--------+--------|
| 3MB | (2) | (2) | (2) 1M | NONE | PAL B | PAL B |
| | 256K x | 256K x | x 9 | | | |
| | 9 | 9 | | | | |
|-------+--------+--------+--------+-------+--------+--------|
| 4MB | (2) 1M | (2) 1M | NONE | NONE | PAL A | PAL A |
| | x 9 | x 9 | | | | |
|-------+--------+--------+--------+-------+--------+--------|
| 5MB | (2) | (2) | (2) 1M | (2) | PAL B | PAL B |
| | 256K x | 256K x | x 9 | 1M x | | |
| | 9 | 9 | | 9 | | |
|-------+--------+--------+--------+-------+--------+--------|
| 6MB | (2) 1M | (2) 1M | (2) 1M | NONE | PAL A | PAL A |
| | x 9 | x 9 | x 9 | | | |
|-------+--------+--------+--------+-------+--------+--------|
| 8MB | (2) 1M | (2) 1M | (2) 1M | (2) | PAL A | PAL A |
| | x 9 | x 9 | x 9 | 1M x | | |
| | | | | 9 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER/SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/5 & | SW1/7 & | SW1/9 & | W8 | W9 |
| | 6 | 8 | 10 | | |
|-------+---------+---------+---------+------------+---------|
| 512KB | Open | Open | Open | pins 1 & 2 | pins 2 |
| | | | | closed | & 3 |
| | | | | | closed |
|-------+---------+---------+---------+------------+---------|
| 1MB | Open | Closed | Open | pins 1 & 2 | pins 2 |
| | | | | closed | & 3 |
| | | | | | closed |
|-------+---------+---------+---------+------------+---------|
| 2MB | Closed | Open | Open | pins 1 & 2 | pins 1 |
| | | | | closed | & 2 |
| | | | | | closed |
|-------+---------+---------+---------+------------+---------|
| 3MB | Closed | Open | Open | pins 1 & 2 | pins 2 |
| | | | | closed | & 3 |
| | | | | | closed |
|-------+---------+---------+---------+------------+---------|
| 4MB | Open | Open | Open | pins 1 & 2 | pins 1 |
| | | | | closed | & 2 |
| | | | | | closed |
|-------+---------+---------+---------+------------+---------|
| 5MB | Open | Closed | Open | pins 1 & 2 | pins 2 |
| | | | | closed | & 3 |
| | | | | | closed |
|-------+---------+---------+---------+------------+---------|
| 6MB | Closed | Open | Open | pins 1 & 2 | pins 1 |
| | | | | closed | & 2 |
| | | | | | closed |
|-------+---------+---------+---------+------------+---------|
| 8MB | Closed | Open | Open | pins 1 & 2 | pins 1 |
| | | | | closed | & 2 |
| | | | | | closed |
|------------------------------------------------------------|
| Note:DRAM jumper configurations correlate directly to |
| memory configurations. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------------+--------------------+--------------------|
| 64KB | (2) 64K x 4 | (1) 8K x 8 |
|------------------------------------------------------------|
| Note:Arrangement of Cache/TAG unverified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT CONFIGURATION |
|------------------------------------------------------------|
| LPT# |Interrupt|Address|SW2/7 &|SW2/9 &|SW3/9 &|SW3/11 & |
| | | | 8 | 10 | 10 | 12 |
|--------+---------+-------+-------+-------+-------+---------|
| LPT1 | IRQ7 | 378h | Open |Closed | Open | Open |
|--------+---------+-------+-------+-------+-------+---------|
| LPT1 | IRQ7 | 3BCh | Open |Closed | Open | Closed |
|--------+---------+-------+-------+-------+-------+---------|
| LPT2 | IRQ5 | 278h |Closed | Open |Closed | Open |
|--------+---------+-------+-------+-------+-------+---------|
|Disabled| N/A | N/A | Open | Open |Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW2/3 & 4 | SW3/3 & 4 |
|--------------------+-------------------+-------------------|
| COM2/IRQ3 | Closed | Open |
|--------------------+-------------------+-------------------|
| Disabled | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 CONFIGURATION |
|------------------------------------------------------------|
| Setting | SW2/5 &6 | SW3/7 & 8 |
|--------------------+-------------------+-------------------|
| COM1/IRQ4 | Closed | Open |
|--------------------+-------------------+-------------------|
| Disabled | Open | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ON BOARD VIDEO CONFIGURATION |
|------------------------------------------------------------|
| Size | SW5 |
|----------+-------------------------------------------------|
| Enabled | pins 1 & 2, 3 & 4, 5 & 6 closed & pins 7 & 8 |
| | open |
|----------+-------------------------------------------------|
| Disabled | pins 1 & 2, 3 & 4, 5 & 6 open & pins 7 & 8 |
| | closed |
+------------------------------------------------------------+