TEXT View Source
# UNIDENTIFIED
CNESXO-20
Processor 80386SX
Processor Speed 20MHz
Chip Set Unknown
Max. Onboard DRAM 16MB
Cache 32/64KB
BIOS AMI
Dimensions 330.2mm x 218.4mm
I/O Options None
NPU Options 80387SX
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External battery | J1 | Turbo LED | JP8 |
|---------------------+----------+----------------+----------|
| Speaker | J21 | Reset switch | S2 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J22 | Turbo switch | S3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------+--------+----------------|
| ยป | CMOS memory normal operation | JP1 | pins 2 & 3 |
| | | | closed |
|---+------------------------------+--------+----------------|
| | CMOS memory clear | JP1 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM (SIMM) 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 |
|------+-------------+-------------+------------+------------|
| 3MB | (2) 256K x | (2) 256K x | (2) 1M x 9 | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (2) 256K x | (2) 256K x | (2) 1M x 9 | (2) 1M x 9 |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 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 |
|------+-------------+-------------+------------+------------|
| 9MB | (2) 256K x | (2) 256K x | (2) 4M x 9 | NONE |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 10MB | (2) 1M x 9 | (2) 4M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (2) 1M x 9 | (2) 1M x 9 | (2) 4M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM (DIP) CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+--------------+------------+------------+------------|
| 1MB | (4) 44256 | NONE | NONE | NONE |
| | and | | | |
| | | | | |
| | (2) 41256 | | | |
|------+--------------+------------+------------+------------|
| 2MB | (4) 44256 | (4) 44256 | NONE | NONE |
| | and | and | | |
| | | | | |
| | (2) 41256 | (2) 41256 | | |
|------+--------------+------------+------------+------------|
| 3MB | (4) 44256 | (4) 44256 | (4) 44256 | NONE |
| | and | and | and | |
| | | | | |
| | (2) 41256 | (2) 41256 | (2) 41256 | |
|------+--------------+------------+------------+------------|
| 4MB | (4) 44256 | (4) 44256 | (4) 44256 | (4) 44256 |
| | and | and | and | and |
| | | | | |
| | (2) 41256 | (2) 41256 | (2) 41256 | (2) 41256 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
|Size| JP3 | JP4 | JP5 | JP6 | JP7 | JP100 | JP101 |
|----+---------+------+------+------+------+--------+--------|
|32KB|pins 2 & |pins 1|pins 1|closed| open |pins 2 &|pins 1 &|
| | 3 | & 2 | & 2 | | | 3 | 2 |
|----+---------+------+------+------+------+--------+--------|
|64KB|pins 2 & |pins 2|pins 2| open |closed|pins 2 &|pins 2 &|
| | 3 | & 3 | & 3 | | | 3 | 3 |
|------------------------------------------------------------|
|Note:Pins designated should be in the closed posiiton. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Cache SRAM | Location | TAG |
|------+--------------+--------------+-----------------------|
| 32KB | (4) 8K x 8 | Banks 0 & 1 | (2) 16K x 4 |
|------+--------------+--------------+-----------------------|
| 64KB | (2) 32K x 8 | Bank 0 | (2) 16K x 4 |
+------------------------------------------------------------+