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# ADVANCED COMPUTER TECHNOLOGY, LTD.
C386
Processor 80386DX
Processor Speed 25/33/40MHz
Chip Set ACT
Max. Onboard DRAM 16MB
Cache 32/64/128KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Turbo switch | JP33 | Power LED & Keylock | JP40 |
|----------------+----------+---------------------+----------|
| Speaker | JP35 | Reset switch | JP41 |
|----------------+----------+---------------------+----------|
| Turbo LED | JP37 | External battery | JP43 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CPU speed select 33MHz | JP1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CPU speed select 25MHz or 40MHz | JP1 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Cache enabled | JP4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Cache disabled | JP4 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | I/O channel RAM cacheable | JP5 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | I/O channel RAM non-cacheable | JP5 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | System BIOS cacheable | JP6 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | System BIOS non-cacheable | JP6 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Video BIOS cacheable | JP7 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Video BIOS non-cacheable | JP7 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | DRAM speed select fast (70 - | JP15 | pins 1 & 2 |
| | 120ns) | | closed |
|---+----------------------------------+--------+------------|
| | DRAM speed select slow (100 - | JP15 | pins 2 & 3 |
| | 150ns) | | closed |
|---+----------------------------------+--------+------------|
| » | Parity check enabled | JP32 | Closed |
|---+----------------------------------+--------+------------|
| | Parity check disabled | JP32 | Open |
|---+----------------------------------+--------+------------|
| » | Bus speed select 8MHz | JP34 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Bus speed select 11MHz | JP34 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Keyboard controller turbo pin | JP38 | pins 3 & 4 |
| | select 30 | | closed |
|---+----------------------------------+--------+------------|
| | Keyboard controller turbo pin | JP38 | pins 5 & 6 |
| | select 24 | | closed |
|---+----------------------------------+--------+------------|
| | Keyboard controller turbo pin | JP38 | pins 7 & 8 |
| | select 23 | | closed |
|---+----------------------------------+--------+------------|
| | Keyboard controller turbo pin | JP38 | pins 1 & 2 |
| | select none | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP39 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP39 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Power good signal detect from | JP42 | pins 1 & 2 |
| | power supply | | closed |
|---+----------------------------------+--------+------------|
| | Power good signal detect from | JP42 | pins 2 & 3 |
| | board | | closed |
|---+----------------------------------+--------+------------|
| » | Battery select internal | JP44 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Battery select external | JP44 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 32KB | (5) 8K x 8 |
|----------------------------+-------------------------------|
| 128KB | (5) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP2 | JP3 |
|-------+-------------------+--------------------------------|
| 32KB | pins 2 & 3 closed | pins 2 & 3, 4 & 5, 6 & 7, 8 & |
| | | 9 closed |
|-------+-------------------+--------------------------------|
| 128KB | pins 1 & 2 closed | pins 1 & 2, 3 & 4, 5 & 6, 7 & |
| | | 8 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (4) 256K x | NONE | NONE | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (4) 256K x | (4) 256K x | NONE | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 6MB | (4) 256K x | (4) 256K x | (4) 1M x 9 | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 256K x | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 12MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP8 | JP9 | JP10 | JP11 | JP12 | JP13 | JP14 |
|------+------+------+-------+-------+-------+-------+-------|
| 1MB | 1 & | 2 & | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 |
| | 2 | 3 | | | | | |
|------+------+------+-------+-------+-------+-------+-------|
| 2MB | 1 & | 1 & | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 |
| | 2 | 2 | | | | | |
|------+------+------+-------+-------+-------+-------+-------|
| 4MB | 1 & | 2 & | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
| | 2 | 3 | | | | | |
|------+------+------+-------+-------+-------+-------+-------|
| 6MB | 2 & | 1 & | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
| | 3 | 2 | | | | | |
|------+------+------+-------+-------+-------+-------+-------|
| 8MB | 1 & | 1 & | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3 |
| | 2 | 2 | | | | | |
|------+------+------+-------+-------+-------+-------+-------|
| 10MB | 2 & | 2 & | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 |
| | 3 | 3 | | | | | |
|------+------+------+-------+-------+-------+-------+-------|
| 12MB | 1 & | 2 & | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
| | 2 | 3 | | | | | |
|------+------+------+-------+-------+-------+-------+-------|
| 16MB | 1 & | 1 & | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 2 & 3 |
| | 2 | 2 | | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+