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# EVEREX SYSTEMS, INC.
3000B 80386SX-20
Processor 80386SX
Processor Speed 20MHz
Chip Set Suntac
Max. Onboard DRAM 8MB
Cache 64KB
BIOS AMI
Dimensions 355mm x 304mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Front panel | J1 | External battery | J4 |
| display | | | |
|-------------------+----------+------------------+----------|
| Speaker | J2 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | J6 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | W7 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | W8 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | I/O bus (8-bit) speed select 5 | W2 | pins 1 & 2 |
| | wait states | | closed |
|---+----------------------------------+--------+------------|
| | I/O bus (8-bit) speed select 4 | W2 | pins 2 & 3 |
| | wait states | | closed |
|---+----------------------------------+--------+------------|
| » | Power on speed select | W3 | pins 2 & 3 |
| | fast/switchable from keyboard | | closed |
|---+----------------------------------+--------+------------|
| | Power on speed select slow | W3 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Power on speed select fast | W3 | Open |
|---+----------------------------------+--------+------------|
| » | I/O bus (16-bit) speed select 2 | W5 | pins 2 & 3 |
| | wait states | | closed |
|---+----------------------------------+--------+------------|
| | I/O bus (16-bit) speed select 1 | W5 | pins 1 & 2 |
| | wait states | | closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select monochrome | W9 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select color | W9 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (2) 256K x | (2) 256K x | NONE | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 2MB | (2) 256K x | (2) 256K x | (2) 256K x | (2) 256K x |
| | 9 | 9 | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 2MB | (2) 1M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 6MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 | (2) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/1 | SW1/2 | SW1/3 | SW1/4 |
|-----------+------------+-----------+-----------+-----------|
| 1MB | On | On | On | On |
|-----------+------------+-----------+-----------+-----------|
| 2MB | On | On | On | Off |
|-----------+------------+-----------+-----------+-----------|
| 2MB | On | Off | Off | On |
|-----------+------------+-----------+-----------+-----------|
| 4MB | On | Off | On | Off |
|-----------+------------+-----------+-----------+-----------|
| 6MB | On | Off | Off | Off |
|-----------+------------+-----------+-----------+-----------|
| 8MB | Off | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W4 | W6 |
|------------------+--------------------+--------------------|
| 1MB | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 2MB | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 2MB | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 4MB | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 6MB | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 8MB | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 3 |
|----------------------------+-------------------------------|
| 64KB | (9) 64K x 1 |
|------------------------------------------------------------|
| Notes:Cache location & chip sizes are unidentified. |
+------------------------------------------------------------+