(TXT) View Source
# JOINDATA SYSTEMS, INC.
G486U/G486USX
Processor 80486SX/80487SX/80486DX
Processor Speed 20/25/33/50MHz
Chip Set UMC
Max. Onboard DRAM 64MB
Cache 64/128/256KB
BIOS AMI/MR
Dimensions 215mm x 330mm
I/O Options None
NPU Options 4167
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Reset switch | J9 | Speaker | J12 |
|----------------+----------+---------------------+----------|
| Turbo switch | J11 | Power LED & keylock | J13 |
|----------------+----------+---------------------+----------|
| Turbo LED | J10 | External battery | J14 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+---------+-----------|
| ยป | Monitor type select color | JP15 | Closed |
|---+----------------------------------+---------+-----------|
| | Monitor type select monochrome | JP15 | 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 | (4) 256K x | NONE |
| | 9 | 9 | 9 | |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 256K x | (4) 256K x | (4) 256K x | (4) 256K x |
| | 9 | 9 | 9 | 9 |
|------+-------------+-------------+------------+------------|
| 4MB | (4) 1M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (4) 256K x | (4) 1 M x 9 | NONE | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 6MB | (4) 256K x | (4) 256K x | (4) 1 M x | NONE |
| | 9 | 9 | 9 | |
|------+-------------+-------------+------------+------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 9MB | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 | NONE |
| | 9 | | | |
|------+-------------+-------------+------------+------------|
| 10MB | (4) 256K x | (4) 256K x | (4) 1M x 9 | (4) 1M x 9 |
| | 9 | 9 | | |
|------+-------------+-------------+------------+------------|
| 12MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
|------+-------------+-------------+------------+------------|
| 16MB | (4) 4M x 9 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (4) 1M x 9 | (4) 1M x 9 | (4) 4M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 36MB | (4) 1M x 9 | (4) 4M x 9 | (4) 4M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 40MB | (4) 1M x 9 | (4) 1M x 9 | (4) 4M x 9 | (4) 4M x 9 |
|------+-------------+-------------+------------+------------|
| 48MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | NONE |
|------+-------------+-------------+------------+------------|
| 64MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Tag |
|--------+-----------------+----------------+----------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (3) 16K x 4 |
|--------+-----------------+----------------+----------------|
| 128KB | (4) 32K x 8 | NONE | (3) 16K x 4 |
|--------+-----------------+----------------+----------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (3) 16K x 4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W14 | W15 | W16 | W17 | W18 |
|----------+----------+----------+---------+--------+--------|
| 64KB | 1 & 2 | Open | 1 & 2 | 1 & 2 | 2 & 3 |
|----------+----------+----------+---------+--------+--------|
| 128KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
|----------+----------+----------+---------+--------+--------|
| 256KB | 1 & 2 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | W5 | W10 | W11 | W12 | W13 |
|---------+--------+--------+------------+--------+----------|
| 80486SX | Closed | Open | Open | Open | pins 1 & |
| | | | | | 2 closed |
|---------+--------+--------+------------+--------+----------|
| 80487SX | Open | Closed | pins 2 & 3 | Closed | pins 2 & |
| | | | closed | | 3 closed |
|---------+--------+--------+------------+--------+----------|
| 80486DX | Open | Closed | pins 1 & 2 | Closed | pins 2 & |
| | | | closed | | 3 closed |
+------------------------------------------------------------+