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# UNIDENTIFIED
A-B 333SX
Processor AM386SX/80386SX
Processor Speed 25/33MHz
Chip Set Unidentified
Max. Onboard DRAM 16MB
Cache 16/32/64/128KB
BIOS AMI
Dimensions 220mm x 220mm
I/O Options None
NPU Options 80387SX (exact location unidentified)
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External battery | J10 | Turbo switch | JP9 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J15 | Turbo LED | JP12 |
|---------------------+----------+----------------+----------|
| Speaker | J18 | Reset switch | JP13 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | JP8 | pins 2 & 3 |
| | (internal battery) | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory normal operation | JP8 | Open |
| | (external battery) | | |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP8 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP10 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP10 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (2) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 1MB | (2) 256K x 9 | (2) 256K x 9 |
|------------------+--------------------+--------------------|
| 2MB | (2) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 2.5MB | (2) 1M x 9 | (2) 256K x 9 |
|------------------+--------------------+--------------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (2) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 16KB | (2) 8K x 8 | NONE |
|------------------+--------------------+--------------------|
| 32KB | (2) 8K x 8 | (2) 8K x 8 |
|------------------+--------------------+--------------------|
| 64KB | (2) 32K x 8 | NONE |
|------------------+--------------------+--------------------|
| 128KB | (2) 32K x 8 | (2) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP1 | JP2 | JP3 | JP4 |
|-------+-------------+------------+------------+------------|
| 16KB | pins 2 & 3 | Open | Open | pins 2 & 3 |
| | closed | | | closed |
|-------+-------------+------------+------------+------------|
| 32KB | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 64KB | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed | closed |
|-------+-------------+------------+------------+------------|
| 128KB | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed | closed |
|------------------------------------------------------------|
| Note: Jumper location is approximated, check board for |
| actual location. |
+------------------------------------------------------------+