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# UNIDENTIFIED
YL-A09
Processor 80286
Processor Speed 16MHz
Chip Set C & T Neat
Max. Onboard DRAM 8MB
Cache None
BIOS AMI
Dimensions 330mm x 259mm
I/O Options None
NPU Options 80287
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J3 | Turbo LED | JP13 |
|------------------+----------+-------------------+----------|
| Speaker | JP11 | Turbo Switch | JP14 |
|------------------+----------+-------------------+----------|
| Reset switch | JP12 | Power LED & | JP16 |
| | | keylock | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | JP2 | closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | NPU mode select synchronous with | JP3 | pins 1 & 2 |
| | CPU | | closed |
|---+----------------------------------+--------+------------|
| | NPU mode select synchronous with | JP3 | pins 2 & 3 |
| | oscillator installed at Y1 | | closed |
|---+----------------------------------+--------+------------|
| » | CPU speed select fast | JP14 | closed |
|---+----------------------------------+--------+------------|
| | CPU speed select slow | JP14 | open |
|---+----------------------------------+--------+------------|
| » | BIOS type select 27256 | JP15 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | BIOS type select 27128 | JP15 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Parity check enabled | JP17 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Parity check disabled | JP17 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Quiet bus enabled | JP20 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Quiet bus disabled (Use for high | JP20 | pins 2 & 3 |
| | speed I/O cards) | | closed |
|---+----------------------------------+--------+------------|
| » | Same type of memory is used in | JP23 | pins 1 & 2 |
| | all four banks | | closed |
|---+----------------------------------+--------+------------|
| | First two banks are different | JP23 | pins 2 & 3 |
| | than last two banks of memory | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 512KB | (18) 41256 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 1MB | (18) 41256 | (18) 41256 | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 1.5MB | (18) 41256 | (18) 41256 | (2) 256K x | NONE |
| | | | 9 | |
|-------+-------------+------------+------------+------------|
| 2MB | (18) 41256 | (18) 41256 | (2) 256K x | (2) 256K x |
| | | | 9 | 9 |
|-------+-------------+------------+------------+------------|
| 2MB | (18) 411000 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 4MB | (18) 411000 | (18) | NONE | NONE |
| | | 411000 | | |
|-------+-------------+------------+------------+------------|
| 6MB | (18) 411000 | (18) | (2) 1M x 9 | NONE |
| | | 411000 | | |
|-------+-------------+------------+------------+------------|
| 8MB | (18) 411000 | (18) | (2) 1M x 9 | (2) 1M x 9 |
| | | 411000 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP7 | JP8 | JP9 | JP10 | JP17 | JP23 |
|--------+--------+--------+--------+-------+--------+-------|
| 512KB | Open | 2 & 3 | Open | Open | 1 & 2 | 1 & 2 |
|--------+--------+--------+--------+-------+--------+-------|
| 1MB | Open | 2 & 3 | Open | 2-3 | 1 & 2 | 1 & 2 |
|--------+--------+--------+--------+-------+--------+-------|
| 1.5MB | 1 & 2 | 2 & 3 | Open | 2-3 | 1 & 2 | 1 & 2 |
|--------+--------+--------+--------+-------+--------+-------|
| 2MB | 1 & 2 | 2 & 3 | 1 & 2 | 2-3 | 1 & 2 | 1 & 2 |
|--------+--------+--------+--------+-------+--------+-------|
| 2MB | Open | 2 & 3 | Open | Open | 1 & 2 | 1 & 2 |
|--------+--------+--------+--------+-------+--------+-------|
| 4MB | Open | 2 & 3 | Open | 2-3 | 1 & 2 | 1 & 2 |
|--------+--------+--------+--------+-------+--------+-------|
| 6MB | 1 & 2 | 2 & 3 | Open | 2-3 | 1 & 2 | 1 & 2 |
|--------+--------+--------+--------+-------+--------+-------|
| 8MB | 1 & 2 | 2 & 3 | 1 & 2 | 2-3 | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/3 | SW1/4 | SW1/5 |
|---------------+--------------+--------------+--------------|
| 512KB | Off | Off | Off |
|---------------+--------------+--------------+--------------|
| 1MB | On | Off | Off |
|---------------+--------------+--------------+--------------|
| 1.5MB | Off | On | Off |
|---------------+--------------+--------------+--------------|
| 2MB | On | On | Off |
|---------------+--------------+--------------+--------------|
| 2MB | Off | Off | On |
|---------------+--------------+--------------+--------------|
| 4MB | On | Off | On |
|---------------+--------------+--------------+--------------|
| 6MB | Off | On | On |
|---------------+--------------+--------------+--------------|
| 8MB | On | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O CONFIGURATION |
|------------------------------------------------------------|
| Setting | JP1A | JP1B | JP1C |
|---------------------------------+--------+--------+--------|
| I/O at full speed during memory | Open | Closed | Open |
| refresh cycle | | | |
|---------------------------------+--------+--------+--------|
| I/O at full speed during memory | Closed | Open | Open |
| refresh cycle and DMA | | | |
|---------------------------------+--------+--------+--------|
| I/O at full speed | Closed | Closed | Closed |
+------------------------------------------------------------+