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# JOINDATA SYSTEMS, INC.
G486PEL
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 20/25/33/50(internal)/50/66(internal)MHz
Chip Set OPTI
Max. Onboard DRAM 128MB
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit local bus card slots (2)
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------------+----------+--------------+----------|
| 32-bit local bus card | COM1 | Turbo switch | J11 |
|-----------------------+----------+--------------+----------|
| 32-bit local bus card | COM2 | Speaker | J12 |
|-----------------------+----------+--------------+----------|
| Reset switch | J9 | Power LED & | J13 |
| | | keylock | |
|-----------------------+----------+--------------+----------|
| Turbo LED | J10 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select monochrome | JP1 | Open |
|---+----------------------------------+--------+------------|
| | Monitor type select color | JP1 | Closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP2 | pins 2 & 3 |
| | alter | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 64MB | (4) 16M x 9 | NONE |
|------------------+--------------------+--------------------|
| 128MB | (4) 16M x 9 | (4) 16M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG | TAG(U42) | Dirty |
| | | | (U39) | | Bit(U43) |
|--------+----------+---------+--------+----------+----------|
| 64KB | (4) 8K x | (4) 8K | (1) 8K | (1) 16K | (1) 16K |
| | 8 | x 8 | x 8 | x 4 | x 4 |
|--------+----------+---------+--------+----------+----------|
| 128KB | (4) 32K | NONE | (1) 8K | (1) 16K | (1) 16K |
| | x 8 | | x 8 | x 4 | x 4 |
|--------+----------+---------+--------+----------+----------|
| 256KB | (4) 32K | (4) 32K | (1) 8K | (1) 16K | (1) 16K |
| | x 8 | x 8 | x 8 | x 4 | x 4 |
|------------------------------------------------------------|
| Note:256KB configuration requires the addition of (1) 8K x |
| 8 tag chip at (U38). |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP4 | JP5 | JP6 | JP7 | JP8 |
|-------+--------+--------+--------+--------+----------------|
| 64KB | Open | Open | Open | Open | pins 2 & 3 |
| | | | | | closed |
|-------+--------+--------+--------+--------+----------------|
| 128KB | Open | Closed | Open | Closed | pins 1 & 2 |
| | | | | | closed |
|-------+--------+--------+--------+--------+----------------|
| 256KB | Closed | Closed | Closed | Closed | pins 2 & 3 |
| | | | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP15 | JP17 |
|------------+--------------------+--------------------------|
| 80486SX | pins 1 & 2 closed | pins 1 & 2, 3 & 4 closed |
|------------+--------------------+--------------------------|
| 80487SX | pins 2 & 3 closed | pins 1 & 2, 3 & 4 closed |
|------------+--------------------+--------------------------|
| 80486DX | Open | pins 2 & 3 closed |
|------------+--------------------+--------------------------|
| 80486DX2 | Open | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP9 | JP12 | JP11 | JP13 | JP14 | JP16 |
|--------------+-----+-------+------+------+--------+--------|
| 80486SX-20 | 2 & | 2 & 3 | 1 & | 2 & | Open | Open |
| | 3 | | 2 | 3 | | |
|--------------+-----+-------+------+------+--------+--------|
| 80486SX-25 | 1 & | 1 & 2 | 1 & | 2 & | Open | Open |
| | 2 | | 2 | 3 | | |
|--------------+-----+-------+------+------+--------+--------|
| 80486DX-25 | 1 & | 1 & 2 | 1 & | 2 & | Open | Open |
| | 2 | | 2 | 3 | | |
|--------------+-----+-------+------+------+--------+--------|
| 80486DX-33 | 1 & | 1 & 2 | 2 & | 2 & | Open | Closed |
| | 2 | | 3 | 3 | | |
|--------------+-----+-------+------+------+--------+--------|
| 80486DX-50 | 1 & | 1 & 2 | 1 & | 1 & | Closed | Closed |
| | 2 | | 2 | 2 | | |
|--------------+-----+-------+------+------+--------+--------|
| 80486DX2-50 | 1 & | 1 & 2 | 1 & | 2 & | Open | Open |
| | 2 | | 2 | 3 | | |
|------------------------------------------------------------|
| Note: Oscillator speed remains synchronous with the CPU, |
| except when using an 80486DX2-50, the oscillator should be |
| 25MHz. Pins designated should be in the closed position. |
+------------------------------------------------------------+