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# SPRING CIRCLE COMPUTER, INC.
80386SX
Processor 80386SX
Processor Speed 25MHz
Chip Set Intel
Max. Onboard DRAM 16MB
Cache None
BIOS AMI
Dimensions 220mm x 236mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External battery | J17 | Turbo switch | J24 |
|---------------------+----------+----------------+----------|
| Speaker | J21 | Turbo LED | J25 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J22 | Reset switch | J26 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | J16 | Open |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J16 | Closed |
|---+----------------------------------+--------+------------|
| » | Battery select internal | J17 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Battery select external | J17 | Closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | J18 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J18 | Open |
|---+----------------------------------+--------+------------|
| » | Floppy drive current select low | J19 | Open |
| | (12mA) | | |
|---+----------------------------------+--------+------------|
| | Floppy drive current select high | J19 | Closed |
| | (24mA) | | |
|---+----------------------------------+--------+------------|
| » | Pipeline mode disabled | J20 | Open |
|---+----------------------------------+--------+------------|
| | Pipeline mode enabled | J20 | Closed |
|---+----------------------------------+--------+------------|
| » | NPU disabled | J23 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | NPU enabled | J23 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Parity | Bank 1 | Parity | Bank | Bank |
| | | (P-0) | | (P-1) | 2 | 3 |
|-------+---------+---------+---------+--------+------+------|
| 512KB | (4) | (2) | NONE | NONE | NONE | NONE |
| | 44256 | 41256 | | | | |
|-------+---------+---------+---------+--------+------+------|
| 512KB | NONE | NONE | NONE | NONE | (2) | NONE |
| | | | | | 256K | |
| | | | | | x 9 | |
|-------+---------+---------+---------+--------+------+------|
| 1MB | (4) | (2) | (4) | (2) | NONE | NONE |
| | 44256 | 41256 | 44256 | 41256 | | |
|-------+---------+---------+---------+--------+------+------|
| 1MB | NONE | NONE | NONE | NONE | (2) | (2) |
| | | | | | 256K | 256K |
| | | | | | x 9 | x 9 |
|-------+---------+---------+---------+--------+------+------|
| 2MB | (4) | (2) | NONE | NONE | NONE | NONE |
| | 441000 | 411000 | | | | |
|-------+---------+---------+---------+--------+------+------|
| 2MB | NONE | NONE | NONE | NONE | (2) | NONE |
| | | | | | 1M x | |
| | | | | | 9 | |
|-------+---------+---------+---------+--------+------+------|
| 4MB | (4) | (2) | (4) | (2) | NONE | NONE |
| | 441000 | 411000 | 441000 | 411000 | | |
|-------+---------+---------+---------+--------+------+------|
| 4MB | NONE | NONE | NONE | NONE | (2) | (2) |
| | | | | | 1M x | 1M x |
| | | | | | 9 | 9 |
|-------+---------+---------+---------+--------+------+------|
| 8MB | NONE | NONE | NONE | NONE | (2) | NONE |
| | | | | | 4M x | |
| | | | | | 9 | |
|-------+---------+---------+---------+--------+------+------|
| 16MB | NONE | NONE | NONE | NONE | (2) | (2) |
| | | | | | 4M x | 4M x |
| | | | | | 9 | 9 |
+------------------------------------------------------------+