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# TEXAS MICRO, INC.
D386SX CPU (REV. B)
Device Type Single board computer
Processor 80386SX
Processor Speed 20/25MHz
Chip Set Unidentified
Maximum Onboard 16MB
Memory
Cache None
BIOS Unidentified
Dimensions 183mm x 122mm
I/O Options Floppy drive interface, IDE interface,
parallel port, serial ports (2)
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| IDE interface | J1 | Serial port 1 | J4 |
|-------------------+----------+------------------+----------|
| Floppy drive | J2 | Parallel port | J5 |
| interface | | | |
|-------------------+----------+------------------+----------|
| Serial port 2 | J3 | External battery | JP1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|------------------------------------+-------+---------------|
| » | Battery enabled | JP1 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | Battery disabled | JP1 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | External battery installed | JP1 | Closed |
|---+--------------------------------+-------+---------------|
| » | Parallel port IRQ select IRQ7 | JP2 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | Parallel port IRQ select IRQ5 | JP2 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| » | User program setup loaded | JP3 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | Default program setup loaded | JP3 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| » | Monitor type select color | JP4 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | Monitor type select monochrome | JP4 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (2) 256K x 9 | None |
|------------------+--------------------+--------------------|
| 1MB | (2) 256K x 9 | (2) 256K x 9 |
|------------------+--------------------+--------------------|
| 2MB | (2) 1M x 9 | None |
|------------------+--------------------+--------------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (2) 4M x 9 | None |
|------------------+--------------------+--------------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 |
+------------------------------------------------------------+