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# LEADING EDGE PRODUCTS, INC.
MODEL D3/SX (VERSION 2)
Processor 80386SX
Processor 16MHz
Speed
Chip Set Zymos
Max. onboard 4MB
DRAM
SRAM Cache None
BIOS Leading Edge
Dimensions 325mm x 308mm
I/O Options Floppy drive interface, mouse port, parallel
port, serial ports (2)
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Mouse port | CN1 | Parallel port | CN4 |
|---------------------+----------+----------------+----------|
| Serial port 1 (25 | CN2 | Floppy drive | CN5 |
| pin) | | interface | |
|---------------------+----------+----------------+----------|
| Serial port 2 (9 | CN3 | | |
| pin) | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | JUMPER | Position |
|-------------------------------+--------+-------------------|
| » | Monitor type select color | J5 | pins 1 & 2 closed |
|---+---------------------------+--------+-------------------|
| | Monitor type select | J5 | pins 2 & 3 closed |
| | monochrome | | |
|---+---------------------------+--------+-------------------|
| » | Floppy drive interface | J9 | pins 2 & 3 closed |
| | enabled | | |
|---+---------------------------+--------+-------------------|
| | Floppy drive interface | J9 | pins 1 & 2 closed |
| | disabled | | |
|---+---------------------------+--------+-------------------|
| » | Mouse port enabled | J15 | pins 1 & 2 closed |
|---+---------------------------+--------+-------------------|
| | Mouse port disabled | J15 | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | J6 | J7 | J8 |
|-------+------------+----------+----------+--------+--------|
| 512KB | (2) 256K x | None | pins 2 & | pins 2 | pins 2 |
| | 9 | | 3 | & 3 | & 3 |
|-------+------------+----------+----------+--------+--------|
| 1MB | (2) 256K x | (2) 256K | pins 2 & | pins 1 | pins 2 |
| | 9 | x 9 | 3 | & 2 | & 3 |
|-------+------------+----------+----------+--------+--------|
| 2MB | (2) 1M x 9 | NONE | pins 2 & | pins 2 | pins 1 |
| | | | 3 | & 3 | & 2 |
|-------+------------+----------+----------+--------+--------|
| 4MB | (2) 1M x 9 | (2) 1M x | pins 2 & | pins 1 | pins 1 |
| | | 9 | 3 | & 2 | & 2 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT CONFIGURATION |
|------------------------------------------------------------|
| IRQ | ADDRESS | J10 | J11 |
|----------+----------+-------------------+------------------|
| 5 | 378h | pins 1 & 2 closed | pins 2 & 3 |
| | | | closed |
|----------+----------+-------------------+------------------|
| 7 | 278h | pins 2 & 3 closed | pins 1 & 2 |
| | | | closed |
|----------+----------+-------------------+------------------|
| 5 | 278h | pins 1 & 2 closed | pins 1 & 2 |
| | | | closed |
|----------+----------+-------------------+------------------|
| 7 | 378h | pins 2 & 3 closed | pins 2 & 3 |
| | | | closed |
|----------+----------+-------------------+------------------|
| Disabled | Disabled | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT CONFIGURATION |
|------------------------------------------------------------|
| Port 1 (25 | Port 2 (9 | J12 | J13 |
| pine) | pin) | | |
|---------------+---------------+--------------+-------------|
| COM1 | COM2 | pins 2 & 3 | pins 2 & 3 |
| | | closed | closed |
|---------------+---------------+--------------+-------------|
| COM1 | COM4 | pins 2 & 3 | pins 1 & 2 |
| | | closed | closed |
|---------------+---------------+--------------+-------------|
| COM1 | Disabled | pins 2 & 3 | Open |
| | | closed | |
|---------------+---------------+--------------+-------------|
| COM3 | COM2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed |
|---------------+---------------+--------------+-------------|
| Disabled | COM2 | Open | pins 2 & 3 |
| | | | closed |
|---------------+---------------+--------------+-------------|
| COM3 | COM4 | pins 1 & 2 | pins 1 & 2 |
| | | closed | closed |
|---------------+---------------+--------------+-------------|
| Disabled | COM4 | Open | pins 1 & 2 |
| | | | closed |
|---------------+---------------+--------------+-------------|
| Disabled | Disabled | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MOUSE CONFIGURATION |
|------------------------------------------------------------|
| IRQ | J16 - J18 | J19 |
|------------------+--------------------+--------------------|
| 3 | Open | Open |
|------------------+--------------------+--------------------|
| 4 | Open | Open |
|------------------+--------------------+--------------------|
| 5 | Open | Open |
|------------------+--------------------+--------------------|
| 9 | Open | Closed |
+------------------------------------------------------------+