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# CSS LABORATORIES, INC.
PREFERRED C320SX
Processor 80386SX
Processor Speed 20MHz
Chip Set C & T
Max. Onboard DRAM 16MB
SRAM Cache 16/32KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options IDE interface, floppy drive interface
parallel port, serial port (2)
NPU Options 80387SX
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J1 | IDE interface LED | LED |
|------------------+----------+-------------------+----------|
| Reset switch | J4/pins | Floppy drive | PJ1 |
| | 1 & 2 | interface | |
|------------------+----------+-------------------+----------|
| Turbo LED | J4/pins | Parallel port | PJ2 |
| | 3 & 4 | | |
|------------------+----------+-------------------+----------|
| Speaker | J6 | Serial port 1 | PJ3 |
|------------------+----------+-------------------+----------|
| Power LED & | J8 | Serial port 2 | PJ4 |
| keylock | | | |
|------------------+----------+-------------------+----------|
| Front panel | J39 | IDE interface | PJ5 |
| switches & LEDs | | | |
|------------------+----------+-------------------+----------|
| Hard drive | J40 | | |
| access LED | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Floppy drive interface enabled | FDDEN | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Floppy drive interface disabled | FDDEN | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | IDE interface enabled | IDEEN | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IDE interface disabled | IDEEN | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | J2 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J2 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | I/O bus wait state select one | J3 | open |
|---+----------------------------------+--------+------------|
| | I/O bus wait states select zero | J3 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | J7 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J7 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J9 | open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | PJ7 | open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | PJ8 | open |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (2) 256K x | (2) 256K x | NONE | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 2MB | (2) 256K x | (2) 256K x | (2) 256K x | (2) 256K x |
| | 9 | 9 | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 2MB | (2) 1M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (2) 1M x 9 | (2) 1M x 9 | (2) 256K x | (2) 256K x |
| | | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 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 |
|------+-------------+-------------+------------+------------|
| 8MB | (2) 4M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 9MB | (2) 4M x 9 | (2) 256K x | (2) 256K x | NONE |
| | | 9 | 9 | |
|------+-------------+-------------+------------+------------|
| 10MB | (2) 4M x 9 | (2) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 11MB | (2) 4M x 9 | (2) 1M x 9 | (2) 256K x | (2) 256K x |
| | | | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 12MB | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 14MB | (2) 4M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
|------+-------------+-------------+------------+------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache SRAM | Location | TAG |
|-----------+----------------+---------------+---------------|
| 16KB | (8) 16K x 1 | Banks 0 & 1 | (1) 8K x 8 |
|-----------+----------------+---------------+---------------|
| 32KB | (4) 8K x 8 | Bank 0 | (1) 8K x 8 |
|------------------------------------------------------------|
| Note:Location and configuration of Cache is unverified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | Jumper W1 | Jumper | Jumper | Jumper | Jumper |
| | | W2 | W3 | W4 | W5 |
|------+-----------+----------+----------+----------+--------|
| 16KB | pins 1 & | pins 1 & | pins 1 & | pins 1 & | pins 1 |
| | 2 | 2 | 2 | 2 | & 2 |
|------+-----------+----------+----------+----------+--------|
| 32KB | pins 2 & | pins 2 & | pins 2 & | pins 2 & | pins 2 |
| | 3 | 3 | 3 | 3 | & 3 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 1 (PJ3) CONFIGURATION |
|------------------------------------------------------------|
| COM | IRQ | I/O | Jumper | S0 | S1 |
| | Interrupt | Address | PJ6 | | |
|----------+-----------+----------+----------+-------+-------|
| COM 2 | IRQ3 | 2F8h | pins 1 & | pins | pins |
| | | | 3 | 1 & 2 | 2 & 3 |
|----------+-----------+----------+----------+-------+-------|
| COM 1 | IRQ4 | 3F8h | pins 1 & | pins | pins |
| | | | 2 | 2 & 3 | 2 & 3 |
|----------+-----------+----------+----------+-------+-------|
| Disabled | N/A | N/A | N/A | pins | pins |
| | | | | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT 2 (PJ4) CONFIGURATION |
|------------------------------------------------------------|
| COM | IRQ | I/O | Jumper | S2 | S3 |
| | Interrupt | Address | PJ6 | | |
|----------+-----------+----------+----------+-------+-------|
| COM 1 | IRQ4 | 3F8h | pins 2 & | pins | pins |
| | | | 4 | 1 & 2 | 2 & 3 |
|----------+-----------+----------+----------+-------+-------|
| COM 2 | IRQ3 | 2F8h | pins 3 & | pins | pins |
| | | | 4 | 2 & 3 | 2 & 3 |
|----------+-----------+----------+----------+-------+-------|
| Disabled | N/A | N/A | N/A | pins | pins |
| | | | | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT 1 (PJ2) CONFIGURATION |
|------------------------------------------------------------|
| LPT | IRQ | I/O | Jumper | Jumper | Jumper |
| | Interrupt | Address | P0 | P1 | PRT |
|----------+-----------+----------+--------+--------+--------|
| LPT 1 | IRQ7 | 3F8h | pins 1 | pins 2 | pins 2 |
| | | | & 2 | & 3 | & 3 |
|----------+-----------+----------+--------+--------+--------|
| LPT 2 | IRQ5 | 2F8h | pins 2 | pins 2 | pins 1 |
| | | | & 3 | & 3 | & 2 |
|----------+-----------+----------+--------+--------+--------|
| LPT 3 | IRQ7 | 3BCh | pins 2 | pins 1 | pins 2 |
| | | | & 3 | & 2 | & 3 |
|----------+-----------+----------+--------+--------+--------|
| Disabled | N/A | N/A | pins 1 | pins 1 | N/A |
| | | | & 2 | & 2 | |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+