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# MONOLITHIC SYSTEMS, INC. (COLORADO MSI)
SBC486IE PISA SINGLE BOARD
Processor 80486SX/80486DX
Processor Speed 20/25/33/50(internal)/66(internal)MHz
Chip Set C & T PEAK DM
Max. Onboard DRAM 128MB
Cache 128KB
BIOS AMI
Dimensions 339mm x 127mm
I/O Options PS/2 mouse port, PS/2 keyboard connector
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------------+----------+---------------+----------|
| External battery | J3 | Power LED | J9 |
|----------------------+----------+---------------+----------|
| Speaker | J5 | Reset switch | J10 |
|----------------------+----------+---------------+----------|
| Power LED & keylock | J6 | PS/2 keyboard | J14 |
|----------------------+----------+---------------+----------|
| Front panel switches | J8 | PS/2 mouse | J15 |
| & LEDs | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | J1 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J2 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J7 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | J4 | Open |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J4 | Closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | J11 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J11 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | PS/2 mouse disabled (IRQ12 free) | J12 | Open |
|---+----------------------------------+--------+------------|
| | PS/2 mouse enabled at IRQ12 | J12 | Closed |
|---+----------------------------------+--------+------------|
| » | Watchdog timer disabled | J13 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Watchdog timer enabled | J13 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | DMA signal select active high | J16 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | DMA signal select active low | J16 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|---------+-------------+------------+-----------+-----------|
| 1MB | (1) 256K x | NONE | NONE | NONE |
| | 36 | | | |
|---------+-------------+------------+-----------+-----------|
| 2MB | (1) 512K x | NONE | NONE | NONE |
| | 36 | | | |
|---------+-------------+------------+-----------+-----------|
| 3MB | (1) 512K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|---------+-------------+------------+-----------+-----------|
| 4MB | (1) 512K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|---------+-------------+------------+-----------+-----------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K | (1) 256K |
| | 36 | 36 | x 36 | x 36 |
|---------+-------------+------------+-----------+-----------|
| 5MB | (1) 512K x | (1) 512K x | (1) 256K | NONE |
| | 36 | 36 | x 36 | |
|---------+-------------+------------+-----------+-----------|
| 6MB | (1) 512K x | (1) 512K x | (1) 512K | NONE |
| | 36 | 36 | x 36 | |
|---------+-------------+------------+-----------+-----------|
| 7MB | (1) 512K x | (1) 512K x | (1) 512K | (1) 256K |
| | 36 | 36 | x 36 | x 36 |
|---------+-------------+------------+-----------+-----------|
| 8MB | (1) 1M x 36 | (1) 1M x | NONE | NONE |
| | | 36 | | |
|---------+-------------+------------+-----------+-----------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|---------+-------------+------------+-----------+-----------|
| 9MB | (1) 2M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|---------+-------------+------------+-----------+-----------|
| 10MB | (1) 2M x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|---------+-------------+------------+-----------+-----------|
| 12MB | (1) 2M x 36 | (1) 512K x | (1) 512K | NONE |
| | | 36 | x 36 | |
|---------+-------------+------------+-----------+-----------|
| 13MB | (1) 2M x 36 | (1) 512K x | (1) 512K | (1) 256K |
| | | 36 | x 36 | x 36 |
|---------+-------------+------------+-----------+-----------|
| 16MB | (1) 2M x 36 | (1) 2M x | NONE | NONE |
| | | 36 | | |
|---------+-------------+------------+-----------+-----------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|---------+-------------+------------+-----------+-----------|
| 17MB | (1) 4M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|---------+-------------+------------+-----------+-----------|
| 18MB | (1) 2M x 36 | (1) 2M x | (1) 512K | NONE |
| | | 36 | x 36 | |
|---------+-------------+------------+-----------+-----------|
| 19MB | (1) 4M x 36 | (1) 512K x | (1) 256K | NONE |
| | | 36 | x 36 | |
|---------+-------------+------------+-----------+-----------|
| 20MB | (1) 2M x 36 | (1) 2M x | (1) 1M x | NONE |
| | | 36 | 36 | |
|---------+-------------+------------+-----------+-----------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|---------+-------------+------------+-----------+-----------|
| 40MB | (1) 8M x 36 | (1) 2M x | NONE | NONE |
| | | 36 | | |
|---------+-------------+------------+-----------+-----------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|---------+-------------+------------+-----------+-----------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|---------+-------------+------------+-----------+-----------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|------------------------------------------------------------|
| Note: These are only some of the possible configurations. |
| Memory must be installed in lower banks first, according |
| to module capacity (highest to lowest). |
+------------------------------------------------------------+