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# EVERSOURCE COMPUTERS, INC.
HT18 386SX
Processor 80386SX
Processor Speed 16/20/25MHz
Chip Set Headland
Max. Onboard DRAM 8MB
Cache None
BIOS AMI
Dimensions 220mm x 220mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| Turbo button | JP2 | Turbo switch | JP10 |
|------------------+----------+-------------------+----------|
| External battery | JP6 | Power LED & | JP11 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Reset switch | JP7 | Speaker | JP17 |
|------------------+----------+-------------------+----------|
| Turbo LED | JP9 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+---------+-----------|
| ยป | Monitor type select color | JP1 | Closed |
|---+----------------------------------+---------+-----------|
| | Monitor type select monochrome | JP1 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | | |
|-------+-------------+------------+------------+------------|
| 1.5MB | (2) 256K x | (2) 256K x | (2) 256K x | NONE |
| | 9 | 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 |
|-------+-------------+------------+------------+------------|
| 3MB | (2) 256K x | (2) 256K x | (2) 1M x 9 | NONE |
| | 9 | 9 | | |
|-------+-------------+------------+------------+------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 4.5MB | (2) 256K x | (2) 1M x 9 | (2) 1M x 9 | NONE |
| | 9 | | | |
|-------+-------------+------------+------------+------------|
| 5MB | (2) 256K x | (2) 256K x | (2) 1M x 9 | (2) 1M x 9 |
| | 9 | 9 | | |
|-------+-------------+------------+------------+------------|
| 6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | NONE |
|-------+-------------+------------+------------+------------|
| 8MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PIPELINE MODE CONFIGURATION |
|------------------------------------------------------------|
| Size | JP12 | JP13 | JP15 | JP16 |
|----------+--------+--------------+------------+------------|
| Disabled | Open | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | | closed | closed | closed |
|----------+--------+--------------+------------+------------|
| Enabled | Closed | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
+------------------------------------------------------------+