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# AMERICAN MEGATRENDS, INC.
AMI 386SX-I
Processor 80386SX
Processor Speed 16/20MHz
Chip Set Intel
Max. Onboard DRAM 8MB
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External battery | J5 | Turbo LED | J14 |
|---------------------+----------+----------------+----------|
| Speaker | J10 | Turbo switch | J18 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J11 | Reset switch | J19 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS ||
|-----------------------------------------------------------||
| Function | Jumper/Switch | Position ||
|------------------------------+---------------+------------||
| » | Keyboard reset enabled | J2 | Closed ||
|---+--------------------------+---------------+------------||
| | Keyboard reset disabled | J2 | Open ||
|---+--------------------------+---------------+------------||
| » | Factory configured - do | J17 | N/A ||
| | not alter | | ||
|---+--------------------------+---------------+------------||
| » | BIOS type select 2764 or | J26 | pins 1 & 2 ||
| | 27128 | | closed ||
|---+--------------------------+---------------+------------||
| | BIOS type select 27256 | J26 | pins 2 & 3 ||
| | | | closed ||
|---+--------------------------+---------------+------------||
| » | Factory configured - do | SW1/1 | Off ||
| | not alter | | ||
|---+--------------------------+---------------+------------||
| » | Monitor type select | SW1/2 | Off ||
| | monochrome | | ||
|---+--------------------------+---------------+------------||
| | Monitor type select | SW1/2 | On ||
| | color | | ||
|---+--------------------------------------------------------|
| | Note : The location of J17 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 512KB | (2) 256K x | NONE | NONE | NONE |
| | 9 | | | |
|-------+-------------+------------+------------+------------|
| 1MB | (2) 256K x | (2) 256K x | NONE | NONE |
| | 9 | 9 | | |
|-------+-------------+------------+------------+------------|
| 2MB | (2) 256K x | (2) 256K x | (2) 256K x | (2) 256K x |
| | 9 | 9 | 9 | 9 |
|-------+-------------+------------+------------+------------|
| 2MB | (2) 1M x 9 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 8MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | J8 | J9 |
|------------------+--------------------+--------------------|
| 100ns fast page | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 100ns | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 120ns | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+