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# SHUTTLE COMPUTER INTERNATIONAL, INC.
HOT-406
Processor 80486SX/80487SX/80486DX
Processor Speed 25/50MHz
Chip Set UMC
Max. Onboard DRAM 64MB
SRAM Cache 64/128/256KB
BIOS AMI
Dimensions 220mm x 330mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Power LED & | J1 | Reset switch | J4 |
| keylock | | | |
|-------------------+----------+------------------+----------|
| Speaker | J2 | Turbo LED | J5 |
|-------------------+----------+------------------+----------|
| Turbo switch | J3 | External battery | J6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+---------+-----------|
| ยป | Monitor type select color | W1 | closed |
|---+----------------------------------+---------+-----------|
| | Monitor type select monochrome | W1 | open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (4) 256K x | NONE | NONE | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (4) 256K x | (4) 256K x | NONE | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (4) 256K x | (4) 256K x | (1) 256K x | NONE |
| | 9 | 9 | 36 | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 256K x | (4) 256K x | (1) 256K x | (1) 256K x |
| | 9 | 9 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (4) 256K x | (4) 1M x 9 | NONE | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 4M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 48MB | (4) 4M x 9 | (4) 4M x 9 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 64MB | (4) 4M x 9 | (4) 4M x 9 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/Switches | Jumper | Jumper | Jumper | Jumper |
| | 1-4 | W6 | W7 | W8 | W9 |
|-------+----------------+--------+--------+--------+--------|
| 64KB | all switches | pins 1 | pins 1 | open | pins 1 |
| | open | & 2 | & 2 | | & 2 |
|-------+----------------+--------+--------+--------+--------|
| 128KB | 1&4 closed 2&3 | pins 2 | pins 1 | pins 1 | pins 2 |
| | open | & 3 | & 2 | & 2 | & 3 |
|-------+----------------+--------+--------+--------+--------|
| 256KB | all switches | pins 2 | pins 2 | pins 2 | pins 1 |
| | closed | & 3 | & 3 | & 3 | & 2 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache SRAM | Location | TAG (U32) | TAG (U33) |
|-------+-------------+------------+------------+------------|
| 64KB | (8) 8K x 8 | Banks 0 & | (1) 16K x | (1) 8K x 8 |
| | | 1 | 4 | |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | Bank 0 | (1) 16K x | (1) 32K x |
| | | | 4 | 8 |
|-------+-------------+------------+------------+------------|
| 256KB | (8) 32K x 8 | Banks 0 & | (1) 16K x | (1) 32K x |
| | | 1 | 4 | 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| CPU | Jumper W2 | Jumper W3 | Jumper W4 |
|---------+-----------+------------+-------------------------|
| 80486DX | open | pins 1 & 2 | pins 1 & 2 and 3 & 4 |
| | | closed | closed |
|---------+-----------+------------+-------------------------|
| 80487SX | open | pins 2 & 3 | pins 1 & 2 and 3 & 4 |
| | | closed | closed |
|---------+-----------+------------+-------------------------|
| 80486SX | closed | open | pins 2 & 3 closed |
+------------------------------------------------------------+