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# ABC COMPUTER COMPANY, LTD.
A3886
Processor 80386SX
Processor Speed 20MHz
Chip Set Intel/VLSI
Max. Onboard DRAM 20MB
Cache None
BIOS AMI
Dimensions 219mm x 195mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J1 | Reset switch | J4 |
|------------------+----------+-------------------+----------|
| Turbo switch | J2 | Power LED & | J5 |
| | | Keylock | |
|------------------+----------+-------------------+----------|
| Turbo LED | J3 | Speaker | J6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------------+--------+----------|
| » | Monitor type select color | JP1 | Closed |
|---+------------------------------------+--------+----------|
| | Monitor type select monochrome | JP1 | Open |
|---+------------------------------------+--------+----------|
| » | Parity enabled | JP2 | Closed |
|---+------------------------------------+--------+----------|
| | Parity disabled | JP2 | Closed |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | JP3 | N/A |
|---+------------------------------------+--------+----------|
| » | CMOS memory normal operation | JP4 | Open |
|---+------------------------------------+--------+----------|
| | CMOS memory clear | JP4 | Closed |
|---+------------------------------------+--------+----------|
| » | Pipeline mode enabled | JP5 | Closed |
|---+------------------------------------+--------+----------|
| | Pipeline mode disabled | JP5 | Open |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | JP6 | N/A |
|---+------------------------------------+--------+----------|
| » | NPU mode select synchronous with | JP7 | Open |
| | CPU | | |
|---+------------------------------------+--------+----------|
| | NPU mode select asynchronous with | JP7 | Closed |
| | CPU | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size |Batch | Bank 0 | Parity |Bank 1 |Parity |Bank 2|Bank |
| | | | (P-0) | | (P-1) | | 3 |
|------+------+--------+--------+-------+-------+------+-----|
|512KB | 512K | (4) | (2) | NONE | NONE | NONE |NONE |
| | | 44256 | 41256 | | | | |
|------+------+--------+--------+-------+-------+------+-----|
|512KB |512KS | NONE | NONE | NONE | NONE | (2) |NONE |
| | | | | | |256K x| |
| | | | | | | 9 | |
|------+------+--------+--------+-------+-------+------+-----|
| 1MB | 1M | (4) | (2) | (4) | (2) | NONE |NONE |
| | | 44256 | 41256 | 44256 | 41256 | | |
|------+------+--------+--------+-------+-------+------+-----|
| 1MB | 1MS | NONE | NONE | NONE | NONE | (2) | (2) |
| | | | | | |256K x|256K |
| | | | | | | 9 | x 9 |
|------+------+--------+--------+-------+-------+------+-----|
|1.5MB |1M512 | (4) | (2) | (4) | (2) | (2) |NONE |
| | | 44256 | 41256 | 44256 | 41256 |256K x| |
| | | | | | | 9 | |
|------+------+--------+--------+-------+-------+------+-----|
| 2MB | 2MK | (4) | (2) | (4) | (2) | (2) | (2) |
| | | 44256 | 41256 | 44256 | 41256 |256K x|256K |
| | | | | | | 9 | x 9 |
|------+------+--------+--------+-------+-------+------+-----|
| 2MB | 2MM | (4) | (2) | NONE | NONE | NONE |NONE |
| | | 441000 | 411000 | | | | |
|------+------+--------+--------+-------+-------+------+-----|
|2.5MB |2M512 | (4) | (2) | (4) | (2) | NONE |NONE |
| | | 44256 | 41256 |441000 |411000 | | |
|------+------+--------+--------+-------+-------+------+-----|
| 3MB | 3M | (4) | (2) | (4) | (2) |(2) 1M|NONE |
| | | 44256 | 41256 | 44256 | 41256 | x 9 | |
|------+------+--------+--------+-------+-------+------+-----|
| 4MB | 4M | (4) | (2) | (4) | (2) | NONE |NONE |
| | | 441000 | 411000 |441000 |411000 | | |
|------+------+--------+--------+-------+-------+------+-----|
| 4MB | 4MS | NONE | NONE | NONE | NONE |(2) 1M| (2) |
| | | | | | | x 9 |1M x |
| | | | | | | | 9 |
|------+------+--------+--------+-------+-------+------+-----|
|4.5MB |4M512 | (4) | (2) | (4) | (2) | (2) |NONE |
| | | 441000 | 411000 |441000 |411000 |256K x| |
| | | | | | | 9 | |
|------+------+--------+--------+-------+-------+------+-----|
| 5MB | 5M | (4) | (2) | (4) | (2) |(2) 1M| (2) |
| | | 44256 | 41256 | 44256 | 41256 | x 9 |1M x |
| | | | | | | | 9 |
|------+------+--------+--------+-------+-------+------+-----|
| 6MB | 6M | (4) | (2) | (4) | (2) |(2) 1M|NONE |
| | | 441000 | 411000 |441000 |411000 | x 9 | |
|------+------+--------+--------+-------+-------+------+-----|
| 8MB | 8M | (4) | (2) | (4) | (2) |(2) 1M| (2) |
| | | 441000 | 411000 |441000 |411000 | x 9 |1M x |
| | | | | | | | 9 |
|------+------+--------+--------+-------+-------+------+-----|
| 8MB | 8M4S | NONE | NONE | NONE | NONE |(2) 4M|NONE |
| | | | | | | x 9 | |
|------+------+--------+--------+-------+-------+------+-----|
| 9MB | 9M | (4) | (2) | (4) | (2) |(2) 4M|NONE |
| | | 44256 | 41256 | 44256 | 41256 | x 9 | |
|------+------+--------+--------+-------+-------+------+-----|
| 12MB | 12M | (4) | (2) | (4) | (2) |(2) 4M|NONE |
| | | 441000 | 411000 |441000 |411000 | x 9 | |
|------+------+--------+--------+-------+-------+------+-----|
| 16MB |16M4S | NONE | NONE | NONE | NONE |(2) 4M| (2) |
| | | | | | | x 9 |4M x |
| | | | | | | | 9 |
|------+------+--------+--------+-------+-------+------+-----|
| 17MB | 17M | (4) | (2) | (4) | (2) |(2) 4M| (2) |
| | | 44256 | 41256 | 44256 | 41256 | x 9 |4M x |
| | | | | | | | 9 |
|------+------+--------+--------+-------+-------+------+-----|
| 20MB | 20M | (4) | (2) | (4) | (2) |(2) 4M| (2) |
| | | 441000 | 411000 |441000 |411000 | x 9 |4M x |
| | | | | | | | 9 |
|------------------------------------------------------------|
|Note:After installing memory, run the applicable batch file |
|on your setup disk. This loads the |
| |
|appropriate values into the chipset. |
+------------------------------------------------------------+