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# JOINDATA SYSTEMS, INC.
G486ULB
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed 20/25/33/50(internal)/50/66(internal)MHz
Chip Set EFAR
Max. Onboard DRAM 32MB
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit local bus card slots (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------+----------+----------------------+-----------|
| Reset switch | J9 | Power LED & keylock | J13 |
|--------------+----------+----------------------+-----------|
| Turbo LED | J10 | External battery | J14 |
|--------------+----------+----------------------+-----------|
| Turbo switch | J11 | 32-bit local bus | S15 & S16 |
| | | card slots | |
|--------------+----------+----------------------+-----------|
| Speaker | J12 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | J18 | Closed |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | W10 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | JP15 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | JP15 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|----------------+---------------------+---------------------|
| 1MB | (4) 256K x 9 | NONE |
|----------------+---------------------+---------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|----------------+---------------------+---------------------|
| 4MB | (4) 1M x 9 | NONE |
|----------------+---------------------+---------------------|
| 5MB | (4) 256K x 9 | (4) 1M x 9 |
|----------------+---------------------+---------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|----------------+---------------------+---------------------|
| 16MB | (4) 4M x 9 | NONE |
|----------------+---------------------+---------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|----------------+---------------------+---------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG | TAG | Dirty(U48) |
| | | | (U38, | (U40) | |
| | | | U39) | | |
|-------+---------+---------+---------+---------+------------|
| 64KB | (4) 8K | (4) 8K | (2) 16K | NONE | (1) 16K x |
| | x 8 | x 8 | x 4 | | 4 |
|-------+---------+---------+---------+---------+------------|
| 64KB | (4) 8K | (4) 8K | NONE | (1) 8K | (1) 16K x |
| | x 8 | x 8 | | x 8 | 4 |
|-------+---------+---------+---------+---------+------------|
| 128KB | (4) 32K | NONE | (2) 16K | NONE | (1) 16K x |
| | x 8 | | x 4 | | 4 |
|-------+---------+---------+---------+---------+------------|
| 128KB | (4) 32K | NONE | NONE | (1) 8K | (1) 16K x |
| | x 8 | | | x 8 | 4 |
|-------+---------+---------+---------+---------+------------|
| 256KB | (4) 32K | (4) 32K | (2) 16K | NONE | (1) 16K x |
| | x 8 | x 8 | x 4 | | 4 |
|-------+---------+---------+---------+---------+------------|
| 256KB | (4) 32K | (4) 32K | NONE | (1) 32K | (1) 16K x |
| | x 8 | x 8 | | x 8 | 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 | OSC1 | W11 | W12 | W13 |
|-------------+-------+------------+------------+------------|
| 80486SX-20 | 20MHz | Open | Open | pins 1 & 2 |
| | | | | closed |
|-------------+-------+------------+------------+------------|
| 80486SX-25 | 25MHz | Open | Open | pins 1 & 2 |
| | | | | closed |
|-------------+-------+------------+------------+------------|
| 80486DX-25 | 25MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
|-------------+-------+------------+------------+------------|
| 80486DX-33 | 33MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
|-------------+-------+------------+------------+------------|
| 80486DX-50 | 50MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
|-------------+-------+------------+------------+------------|
| 80486DX2-50 | 25MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
|-------------+-------+------------+------------+------------|
| 80486DX2-66 | 33MHz | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | | closed | closed | closed |
+------------------------------------------------------------+