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# CACHE COMPUTERS, INC.
386SX-25 (Model 316)
Processor 80386SX
Processor speed 20/25MHz
Chip Set OPTI
Max. Onboard 16MB
DRAM
Cache None
BIOS AMI/Cache
Dimensions 330.2mm x 218.4mm
I/O Options Bus mouse port, game port, serial ports (2),
parallel port, floppy drive interface, IDE
interface
NPU options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Auxiliary | J1 | Game port | P3 |
| keyboard | | | |
|-------------------+----------+------------------+----------|
| External battery | J3 | Bus mouse port | P4 |
|-------------------+----------+------------------+----------|
| IDE interface LED | J13 | IDE interface | P5 |
|-------------------+----------+------------------+----------|
| Speaker | J21 | Floppy drive | P6 |
| | | interface | |
|-------------------+----------+------------------+----------|
| Power LED & | J22 | Parallel port | P7 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Turbo LED | JP3 | Reset switch | S1 |
|-------------------+----------+------------------+----------|
| Serial port 0 | P1 | Turbo switch | S2 |
|-------------------+----------+------------------+----------|
| Serial port 1 | P2 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | CMOS memory normal | JP1 | pins 2 & 3 |
| | operation (internal | | closed |
| | battery) | | |
|---+---------------------------+---------------+------------|
| | CMOS memory normal | JP1 | Open |
| | operation (external | | |
| | battery) | | |
|---+---------------------------+---------------+------------|
| | CMOS memory clear | JP1 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | JP2 | Closed |
| | (AMI BIOS) | | |
|---+---------------------------+---------------+------------|
| | Monitor type select | JP2 | Open |
| | monochrome (AMI BIOS) | | |
|---+---------------------------+---------------+------------|
| » | Password enabled (Cache | JP2 | Closed |
| | BIOS) | | |
|---+---------------------------+---------------+------------|
| | Password disabled (Cache | JP2 | Open |
| | BIOS) | | |
|---+---------------------------+---------------+------------|
| » | Floppy drive | SW1/1 | Off |
| | interface-(P6) enabled | | |
|---+---------------------------+---------------+------------|
| | Floppy drive | SW1/1 | On |
| | interface-(P6) disabled | | |
|---+---------------------------+---------------+------------|
| » | IDE interface-(P5) | SW1/2 | Off |
| | enabled | | |
|---+---------------------------+---------------+------------|
| | IDE interface (P5) | SW1/2 | On |
| | disabled | | |
|---+---------------------------+---------------+------------|
| » | Serial port 0 (P1) | SW1/3 | Off |
| | enabled | | |
|---+---------------------------+---------------+------------|
| | Serial port 0 (P1) | SW1/3 | On |
| | disabled | | |
|---+---------------------------+---------------+------------|
| » | Serial port 1 (P2) | SW1/4 | Off |
| | enabled | | |
|---+---------------------------+---------------+------------|
| | Serial port 1 (P2) | SW1/4 | On |
| | disabled | | |
|---+---------------------------+---------------+------------|
| » | Game port (P3) enabled | SW1/5 | Off |
|---+---------------------------+---------------+------------|
| | Game port (P3) disabled | SW1/5 | On |
|---+---------------------------+---------------+------------|
| » | Parallel port (P7) | SW1/6 | Off |
| | enabled | | |
|---+---------------------------+---------------+------------|
| | Parallel port (P7) | SW1/6 | On |
| | disabled | | |
|---+---------------------------+---------------+------------|
| » | Bus mouse port (P4) | SW1/7 | Off |
| | enabled | | |
|---+---------------------------+---------------+------------|
| | Bus mouse port (P4) | SW1/7 | On |
| | disabled | | |
|---+---------------------------+---------------+------------|
| » | Floppy drive interface | W3 | Open |
| | (P6) address select | | |
| | 1F0-1F7 | | |
|---+---------------------------+---------------+------------|
| | Floppy drive interface | W3 | Closed |
| | (P6) address select | | |
| | 170-177 | | |
|---+---------------------------+---------------+------------|
| » | IDE address select | W4 | Open |
| | 3F1-3F7 | | |
|---+---------------------------+---------------+------------|
| | IDE address select | W4 | Closed |
| | 371-377 | | |
|---+---------------------------+---------------+------------|
| » | Serial port 0 (P1) | W5 | Open |
| | address select 3F8-3FF | | |
|---+---------------------------+---------------+------------|
| | Serial port 0 (P1) | W5 | Closed |
| | address select 3E8-3EF | | |
|---+---------------------------+---------------+------------|
| » | Serial port 1 (P2) | W6 | Open |
| | address select 2F8-2FF | | |
|---+---------------------------+---------------+------------|
| | Serial port 1 (P2) | W6 | Closed |
| | address select 2E8-2EF | | |
|---+---------------------------+---------------+------------|
| » | Parallel port (P7) | W7 | Open |
| | address select 378-37F | | |
|---+---------------------------+---------------+------------|
| | Parallel port (P7) | W7 | Closed |
| | address select 278-27F | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------+-------------+-------------+------------+------------|
| 3MB | (2) 256K x | (2) 256K x | (2) 1M x 9 | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (2) 256K x | (2) 256K x | (2) 1M x 9 | (2) 1M x 9 |
| | 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 |
|------+-------------+-------------+------------+------------|
| 9MB | (2) 256K x | (2) 256K x | (2) 4M x 9 | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 10MB | (2) 1M x 9 | (2) 4M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (2) 1M x 9 | (2) 1M x 9 | (2) 4M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS MOUSE INTERRUPT CONFIGURATION |
|------------------------------------------------------------|
| IRQ | W1 | W2 |
|-------------------+--------------------+-------------------|
| IRQ5 | Open | Closed |
|-------------------+--------------------+-------------------|
| IRQ2 | Closed | Open |
|-------------------+--------------------+-------------------|
| None | Open | Open |
+------------------------------------------------------------+