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# BIOSTAR MICROTECH INTERNATIONAL CORPORATION
286 SYSTEM BOARD
Processor 80286
Processor Speed 10/12MHz
Chip Set VLSI
Max. Onboard DRAM 4MB
Cache None
BIOS AMI/Award/Phoenix
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Power LED & keylock | KLCK | Turbo LED | TBLED |
|---------------------+----------+----------------+----------|
| Reset switch | RST | Turbo switch | TBSW |
|---------------------+----------+----------------+----------|
| Speaker | SPK | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Location |
|-------------------------------------+--------+-------------|
| » | BIOS type select 27128 | JP1 | pins 2 & 3 |
| | | | closed |
|---+---------------------------------+--------+-------------|
| | BIOS type select 27256 | JP1 | pins 1 & 2 |
| | | | closed |
|---+---------------------------------+--------+-------------|
| » | CPU slow speed select 8MHz | JP6 | Closed |
|---+---------------------------------+--------+-------------|
| | CPU slow speed select 6MHz | JP6 | Open |
|---+---------------------------------+--------+-------------|
| » | Monitor type select color | JP7 | Closed |
|---+---------------------------------+--------+-------------|
| | Monitor type select monochrome | JP7 | Open |
|---+---------------------------------+--------+-------------|
| » | DRAM speed select 0 wait states | JP8 | Closed |
|---+---------------------------------+--------+-------------|
| | DRAM speed select 1 wait state | JP8 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size |Bank 0 |Bank 1 | P-1 |Bank 2 | P-2 | Bank 3 |Bank |
| | | | | | | | 4 |
|-------+-------+-------+------+-------+------+--------+-----|
|512KB 1| (18) | NONE | NONE | NONE | NONE | NONE |NONE |
| | 41256 | | | | | | |
|-------+-------+-------+------+-------+------+--------+-----|
|512KB 1| NONE | (4) | (2) | NONE | NONE | NONE |NONE |
| | | 44256 |41256 | | | | |
|-------+-------+-------+------+-------+------+--------+-----|
|512KB 2| NONE | NONE | NONE | NONE | NONE |(2) 256K|NONE |
| | | | | | | x 9 | |
|-------+-------+-------+------+-------+------+--------+-----|
|640KB 1| (18) | NONE | NONE | (4) | (2) | NONE |NONE |
| | 41256 | | | 4464 | 4164 | | |
|-------+-------+-------+------+-------+------+--------+-----|
|640KB 1| NONE | (4) | (2) | (4) | (2) | NONE |NONE |
| | | 44256 |41256 | 4464 | 4164 | | |
|-------+-------+-------+------+-------+------+--------+-----|
|640KB 2| (18) | NONE | NONE | NONE | NONE |(2) 256K|NONE |
| | 4164 | | | | | x 9 | |
|-------+-------+-------+------+-------+------+--------+-----|
|640KB 2| NONE | NONE | NONE | (4) | (2) |(2) 256K|NONE |
| | | | | 4464 | 4164 | x 9 | |
|-------+-------+-------+------+-------+------+--------+-----|
| 1MB 1 | (18) | NONE | NONE | (2) | (4) | NONE |NONE |
| | 41256 | | | 44256 |41256 | | |
|-------+-------+-------+------+-------+------+--------+-----|
| 1MB 1 | (18) | (4) | (2) | NONE | NONE | NONE |NONE |
| | 41256 | 44256 |41256 | | | | |
|-------+-------+-------+------+-------+------+--------+-----|
| 1MB 2 | NONE | NONE | NONE | NONE | NONE |(2) 256K| (2) |
| | | | | | | x 9 |256K |
| | | | | | | | x 9 |
|-------+-------+-------+------+-------+------+--------+-----|
| 2MB 1 | (18) | NONE | NONE | NONE | NONE | NONE |NONE |
| |411000 | | | | | | |
|-------+-------+-------+------+-------+------+--------+-----|
| 2MB 2 | NONE | NONE | NONE | NONE | NONE |(2) 1M x|NONE |
| | | | | | | 9 | |
|-------+-------+-------+------+-------+------+--------+-----|
| 4MB 1 | (18) | NONE | NONE | NONE | NONE |(2) 1M x|NONE |
| |411000 | | | | | 9 | |
|-------+-------+-------+------+-------+------+--------+-----|
| 4MB 2 | NONE | NONE | NONE | NONE | NONE |(2) 1M x| (2) |
| | | | | | | 9 |1M x |
| | | | | | | | 9 |
|------------------------------------------------------------|
|Note 1 :Set JP9, JP10, and JP11 pins 2 & 3 closed. |
| |
|Note 2 :Set JP9, JP10, and JP11 pins 1 & 2 closed. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP2 | JP3 | JP4 |
|--------------+---------------+--------------+--------------|
| 512KB | Closed | Closed | Closed |
|--------------+---------------+--------------+--------------|
| 640KB | Closed | Closed | Open |
|--------------+---------------+--------------+--------------|
| 1MB | Closed | Open | Closed |
|--------------+---------------+--------------+--------------|
| 2MB | Closed | Open | Open |
|--------------+---------------+--------------+--------------|
| 4MB | Open | Closed | Closed |
+------------------------------------------------------------+