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# UNIDENTIFIED
U386
Processor 80386DX
Processor Speed 33/40MHz
Chip Set OPTI
Max. Onboard DRAM 32MB
SRAM Cache 32/128KB
BIOS AMI
Dimensions 220mm x 220mm
I/O Options NONE
NPU Options 80387
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J1 | Reset switch | J4 |
|------------------+----------+-------------------+----------|
| Turbo LED | J2 | Speaker | J5 |
|------------------+----------+-------------------+----------|
| Turbo switch | J3 | Power LED & | J6 |
| | | keylock | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | CMOS memory normal operation | W1 | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | W1 | open |
|---+--------------------------------+--------+--------------|
| » | Monitor type select color | W2 | closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | W2 | open |
|---+--------------------------------+--------+--------------|
| » | NPU disabled | W4 | open |
|---+--------------------------------+--------+--------------|
| | NPU enabled | W4 | closed |
|---+--------------------------------+--------+--------------|
| » | Parity check enabled | W16 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | Parity check disabled | W16 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Jumper | 32KB | 128KB |
|------------------+--------------------+--------------------|
| W8 | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| W9 | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| W10 | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| W11 | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| W12 | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| W13 | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| W14 | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| W15 | open | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache SRAM | TAG |
|------------------+--------------------+--------------------|
| 32KB | (4) 8K x 8 | (1) 8K x 8 |
|------------------+--------------------+--------------------|
| 128KB | (4) 32K x 8 | (1) 8K x 8 |
+------------------------------------------------------------+