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# SAMSUNG ELECTRONICS AMERICA, INC.
SD820
Processor 80386SX
Processor Speed 25MHz
Chip Set Unidentified
Max. Onboard DRAM 8MB
Cache 64KB
BIOS Phoenix
Dimensions 330mm x 218mm
I/O Options 32-bit external memory slots (2)
NPU Options 80387SX/3167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Serial port 1 | J1 | Reset switch | J24 |
|----------------+----------+---------------------+----------|
| Serial port 2 | J2 | Speaker | J25 |
|----------------+----------+---------------------+----------|
| Parallel port | J4 | Front panel | J26 |
| | | connector | |
|----------------+----------+---------------------+----------|
| Serial port | J5 | 32-bit external | SL1 & |
| header | | memory card slots | SL2 |
|----------------+----------+---------------------+----------|
| Serial port | J6 | | |
| header | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|-----------------------------------+-----------+------------|
| » | Printer acknowledge type | J7 | pins 2 & 3 |
| | select trailing edge | | closed |
|---+-------------------------------+-----------+------------|
| | Printer acknowledge type | J7 | pins 1 & 2 |
| | select leading edge | | closed |
|---+-------------------------------+-----------+------------|
| » | Parallel printer port enabled | J8 | pins 1 & 2 |
| | (LPT 1) | | closed |
|---+-------------------------------+-----------+------------|
| | Parallel printer port | J8 | pins 2 & 3 |
| | disabled (LPT 1) | | closed |
|---+-------------------------------+-----------+------------|
| » | Parallel printer port | J9 | pins 2 & 3 |
| | disabled (LPT 2) | | closed |
|---+-------------------------------+-----------+------------|
| | Parallel printer port enabled | J9 | pins 1 & 2 |
| | (LPT 2) | | closed |
|---+-------------------------------+-----------+------------|
| » | Serial port enabled (COM 1 & | J10 & J11 | pins 1 & 2 |
| | COM 2) | | closed |
|---+-------------------------------+-----------+------------|
| | Serial port disabled (COM 1 & | J10 & J11 | pins 2 & 3 |
| | COM 2) | | closed |
|---+-------------------------------+-----------+------------|
| » | Monitor type select color | J12 | pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-----------+------------|
| | Monitor type select | J12 | pins 1 & 2 |
| | monochrome | | closed |
|---+-------------------------------+-----------+------------|
| » | Factory configured - do not | J13 | Open |
| | alter | | |
|---+-------------------------------+-----------+------------|
| » | ROM size select 64K | J14 | pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-----------+------------|
| | ROM size select 128K | J14 | pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-----------+------------|
| » | Factory configured - do not | J15 | Open |
| | alter | | |
|---+-------------------------------+-----------+------------|
| » | DRAM speed select 100 ns | J22 | pins 1 & 2 |
| | | | closed |
|---+-------------------------------+-----------+------------|
| | DRAM speed select 85 ns | J22 | pins 2 & 3 |
| | | | closed |
|---+-------------------------------+-----------+------------|
| » | Factory configured - do not | J23 | Open |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J16 | J17 | J18 | J19 |
|------+--------------+------------+------------+------------|
| 1MB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed | closed |
|------+--------------+------------+------------+------------|
| 2MB | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed | closed |
|------+--------------+------------+------------+------------|
| 4MB | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed | closed |
|------+--------------+------------+------------+------------|
| 8MB | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J20 | J21 |
|-------------------+--------------------+-------------------|
| Static column | pins 2 & 3 closed | pins 1 & 2 closed |
|-------------------+--------------------+-------------------|
| Fast page mode | pins 2 & 3 closed | pins 2 & 3 closed |
|-------------------+--------------------+-------------------|
| Standard RAS/CAS | pins 1 & 2 closed | pins 1 & 2 closed |
+------------------------------------------------------------+