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# ADVANCED COMPUTER TECHNOLOGY, LTD.
T386-25
Processor 80386DX
Processor Speed 25MHz
Chip Set ACT
Max. Onboard DRAM 16MB
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Turbo LED | JP3 | External battery | JP13 |
|-------------------+----------+------------------+----------|
| Power LED & | JP7 | Speaker | JP16 |
| Keylock | | | |
|-------------------+----------+------------------+----------|
| Reset switch | JP12 | Turbo switch | JP17 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|-------------------------------+---------------+------------|
| » | BIOS type select 27512 | JP6 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | BIOS type select 27256 | JP6 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Monitor type select color | JP8 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | Monitor type select | JP8 | pins 1 & 2 |
| | monochrome | | closed |
|---+---------------------------+---------------+------------|
| » | Battery select internal | JP14 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | Battery select external | JP14 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Power good signal detect | JP15 | pins 1 & 2 |
| | from power supply | | closed |
|---+---------------------------+---------------+------------|
| | Power good signal detect | JP15 | pins 2 & 3 |
| | from board | | closed |
|---+---------------------------+---------------+------------|
| » | Refresh timing select | JP18 | pins 1 & 2 |
| | normal | | closed |
|---+---------------------------+---------------+------------|
| | Refresh timing select | JP18 | pins 2 & 3 |
| | fast | | closed |
|---+---------------------------+---------------+------------|
| » | Parity check enabled | JP19 | pins 1 & 2 |
| | | | closed |
|---+---------------------------+---------------+------------|
| | Parity check disabled | JP19 | pins 2 & 3 |
| | | | closed |
|---+---------------------------+---------------+------------|
| » | Page mode select normal | JP20 | pins 1 & 2 |
| | 1, 2 wait state | | closed |
|---+---------------------------+---------------+------------|
| | Page mode select page | JP20 | pins 2 & 3 |
| | interleave | | closed |
|---+---------------------------+---------------+------------|
| » | SIMM wait state select 2 | JP21 | pins 2 & 3 |
| | wait states (non-page | | closed |
| | mode) | | |
|---+---------------------------+---------------+------------|
| | SIMM wait state select 1 | JP21 | pins 1 & 2 |
| | wait state (non-page | | closed |
| | mode) | | |
|---+---------------------------+---------------+------------|
| » | DIP RAM wait state select | JP22 | pins 2 & 3 |
| | 2 wait states (non-page | | closed |
| | mode) | | |
|---+---------------------------+---------------+------------|
| | DIP RAM wait state select | JP22 | pins 1 & 2 |
| | 1 wait state (non-page | | closed |
| | mode) | | |
|---+---------------------------+---------------+------------|
| » | Interleave factor banks | SW1/3 | Off |
| | 0-3 four way interleave | | |
| | disabled | | |
|---+---------------------------+---------------+------------|
| | Interleave factor banks | SW1/3 | On |
| | 0-3 four way interleave | | |
| | enabled | | |
|---+---------------------------+---------------+------------|
| » | Interleave factor banks 2 | SW1/4 | Off |
| | and 3 interleave disabled | | |
|---+---------------------------+---------------+------------|
| | Interleave factor banks 2 | SW1/4 | On |
| | and 3 two way interleave | | |
| | enabled | | |
|---+---------------------------+---------------+------------|
| » | Interleave factor banks 0 | SW1/5 | Off |
| | and 1 interleave disabled | | |
|---+---------------------------+---------------+------------|
| | Interleave factor banks 0 | SW1/5 | On |
| | and 1 two way interleave | | |
| | enabled | | |
|------------------------------------------------------------|
| Note:SW1/switch 5 should be open if 1MB is installed, if |
| memory is greater it should be closed. |
| |
| SW1/switch 4 should be closed if 10MB is installed. |
| |
| SW1/switch 3 should be closed if 4MB is installed. |
| |
| JP20 pins 1 & 2 must be closed if 4M x 9 SIMMs are used. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | P-0 | P-1 |
|------+--------+--------+--------+--------+--------+--------|
| 1MB | (8) | NONE | NONE | NONE | (4) | NONE |
| | 44256 | | | | 41256 | |
|------+--------+--------+--------+--------+--------+--------|
| 2MB | (8) | (8) | NONE | NONE | (4) | (4) |
| | 44256 | 44256 | | | 41256 | 41256 |
|------+--------+--------+--------+--------+--------+--------|
| 3MB | (8) | (8) | (4) | NONE | (4) | (4) |
| | 44256 | 44256 | 256K x | | 41256 | 41256 |
| | | | 9 | | | |
|------+--------+--------+--------+--------+--------+--------|
| 4MB | (8) | (8) | (4) | (4) | (4) | (4) |
| | 44256 | 44256 | 256K x | 256K x | 41256 | 41256 |
| | | | 9 | 9 | | |
|------+--------+--------+--------+--------+--------+--------|
| 6MB | (8) | (8) | (4) 1M | NONE | (4) | (4) |
| | 44256 | 44256 | x 9 | | 41256 | 41256 |
|------+--------+--------+--------+--------+--------+--------|
| 10MB | (8) | (8) | (4) 1M | (4) 1M | (4) | (4) |
| | 44256 | 44256 | x 9 | x 9 | 41256 | 41256 |
|------+--------+--------+--------+--------+--------+--------|
| 16MB | NONE | NONE | (4) 4M | (4) 4M | NONE | NONE |
| | | | x 9 | x 9 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER/SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/6 | SW1/7 | SW1/8 | JP23 |
|---------+----------+---------+---------+-------------------|
| 1MB | Off | Off | Off | pins 2 & 3 closed |
|---------+----------+---------+---------+-------------------|
| 2MB | Off | Off | On | pins 2 & 3 closed |
|---------+----------+---------+---------+-------------------|
| 3MB | Off | On | Off | pins 2 & 3 closed |
|---------+----------+---------+---------+-------------------|
| 4MB | Off | On | On | pins 2 & 3 closed |
|---------+----------+---------+---------+-------------------|
| 6MB | On | On | Off | pins 2 & 3 closed |
|---------+----------+---------+---------+-------------------|
| 10MB | On | On | On | pins 2 & 3 closed |
|---------+----------+---------+---------+-------------------|
| 16MB | Off | Off | Off | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM REFRESH RATE CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/1 | SW1/2 |
|-----------------------------------+------------+-----------|
| Refreshes per hold cycle select 1 | Off | Off |
|-----------------------------------+------------+-----------|
| Refreshes per hold cycle select 2 | Off | On |
|-----------------------------------+------------+-----------|
| Refreshes per hold cycle select 4 | On | Off |
|-----------------------------------+------------+-----------|
| Refreshes per hold cycle select 8 | On | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP2 | JP4 |
|------------------+--------------------+--------------------|
| 80387 | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 3167 | pins 2 & 3 closed | pins 1 & 2 closed |
+------------------------------------------------------------+