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# MONOLITHIC SYSTEMS, INC. (COLORADO MSI)
SBC486PE PEISA SINGLE BOARD
Processor 80486SX/80386DX/80486DX2
Processor Speed 25/33/40/50(internal)/50/66(internal)MHz
Chip Set Intel
Max. Onboard 128MB
DRAM
Cache 128/256KB (on 32-bit external cache module)
BIOS AMI
Dimensions 339mm x 127mm
I/O Options 32-bit external cache module slot, PS/2 mouse
port, PS/2 keyboard connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| IDE interface LED | J1 | Power LED & | J7 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| Reset switch | J2 | Auxiliary | J8 |
| | | keyboard | |
|-------------------+----------+------------------+----------|
| Power LED | J3 | PS/2 keyboard | J9 |
|-------------------+----------+------------------+----------|
| External battery | J4 | PS/2 mouse | J11 |
|-------------------+----------+------------------+----------|
| Front panel | J5 | 32-bit external | S1 |
| switches & LEDs | | cache module | |
|-------------------+----------+------------------+----------|
| Speaker | J6 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | J10 | Open |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | J10 | Closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | J12 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | J12 | Open |
|---+----------------------------------+--------+------------|
| » | Watchdog timer disabled | J13 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Watchdog timer enabled | J13 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J14 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J14 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | 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 36 | NONE | NONE | NONE |
|---------+---------------+-----------+-----------+----------|
| 2MB | (1) 512K x 36 | NONE | NONE | NONE |
|---------+---------------+-----------+-----------+----------|
| 4MB | (1) 256K x 36 | (1) 256K | (1) 256K | (1) 256K |
| | | x 36 | x 36 | x 36 |
|---------+---------------+-----------+-----------+----------|
| 4MB | (1) 512K x 36 | (1) 512K | NONE | NONE |
| | | x 36 | | |
|---------+---------------+-----------+-----------+----------|
| 6MB | (1) 512K x 36 | (1) 512K | (1) 512K | NONE |
| | | x 36 | x 36 | |
|---------+---------------+-----------+-----------+----------|
| 8MB | (1) 1M x 36 | (1) 1M x | NONE | NONE |
| | | 36 | | |
|---------+---------------+-----------+-----------+----------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|---------+---------------+-----------+-----------+----------|
| 12MB | (1) 1M x 36 | (1) 1M x | (1) 1M x | NONE |
| | | 36 | 36 | |
|---------+---------------+-----------+-----------+----------|
| 16MB | (1) 2M x 36 | (1) 2M x | NONE | NONE |
| | | 36 | | |
|---------+---------------+-----------+-----------+----------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|---------+---------------+-----------+-----------+----------|
| 32MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|---------+---------------+-----------+-----------+----------|
| 32MB | (1) 4M x 36 | (1) 4M x | NONE | NONE |
| | | 36 | | |
|---------+---------------+-----------+-----------+----------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|---------+---------------+-----------+-----------+----------|
| 48MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|---------+---------------+-----------+-----------+----------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|---------+---------------+-----------+-----------+----------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|---------+---------------+-----------+-----------+----------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 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. |
| All modules must be of like capacity. |
+------------------------------------------------------------+