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# JOINDATA SYSTEMS, INC.
G486PE
Processor 80486SX/80486DX/80486DX2
Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set OPTI
Max. Onboard DRAM 32MB
Cache 64/128/256/512KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Speaker | J4 | Reset switch | J9 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | J5 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+---------+-----------|
| » | I/O bus speed select normal | JP1 | Open |
|---+----------------------------------+---------+-----------|
| | I/O bus speed select slow | JP1 | Closed |
|---+----------------------------------+---------+-----------|
| » | Monitor type select monochrome | JP5 | Open |
|---+----------------------------------+---------+-----------|
| | Monitor type select color | JP5 | Closed |
|---+----------------------------------+---------+-----------|
| » | Burst mode enabled | JP7 | Closed |
|---+----------------------------------+---------+-----------|
| | Burst mode disabled | JP7 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG | TAG | Dirty |
| | | | (U52) | (U52) | Bit(U66) |
|-------+---------+---------+----------+----------+----------|
| 64KB | 4) 8K x | 4) 8K x | (1) 8K x | N/A | (1) 16K |
| | 8 | 8 | 8 | | x 1 |
|-------+---------+---------+----------+----------+----------|
| 128KB | (4) 32K | NONE | (1) 8K x | N/A | (1) 16K |
| | x 8 | | 8 | | x 1 |
|-------+---------+---------+----------+----------+----------|
| 256KB | (4) 32K | (4) 32K | (1) 8K x | (1) 8K x | (1) 16K |
| | x 8 | x 8 | 8 | 8 | x 1 |
|-------+---------+---------+----------+----------+----------|
| 512KB | (4) | NONE | (1) 32K | N/A | (1) 64K |
| | 128K x | | x 8 | | x 1 |
| | 8 | | | | |
|------------------------------------------------------------|
| Note:You may use a (1) 64K x 1 at U66 for all Cache SRAM |
| sizes . |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP6 | JP11 | JP12 | JP13 | JP14 | JP15 | JP16 |
|-------+------+-------+-------+-------+-------+------+------|
| 64KB |2 & 3 | Open | Open | Open | Open | Open | Open |
|-------+------+-------+-------+-------+-------+------+------|
| 128KB |1 & 2 | Open | Open |Closed | Open |Closed| Open |
|-------+------+-------+-------+-------+-------+------+------|
| 256KB |2 & 3 | Open |Closed |Closed |Closed |Closed| Open |
|-------+------+-------+-------+-------+-------+------+------|
| 512KB |1 & 2 |Closed |Closed |Closed |Closed |Closed|Closed|
|------------------------------------------------------------|
|Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | OSC1 | JP2 | JP3 | JP8 | JP9 | JP10 |
|------------+-------+--------+--------+------+------+-------|
| 80486DX2- | 50MHz | Closed | Closed | 1 & | 2 & | 1 & 2 |
| 50 MHz | | | | 2, 3 | 3 | |
| | | | | & 4 | | |
|------------+-------+--------+--------+------+------+-------|
| 80486DX2- | 25MHz | Closed | Closed | 1 & | 1 & | 1 & 2 |
| 50 MHz | | | | 2, 3 | 2 | |
| | | | | & 4 | | |
|------------+-------+--------+--------+------+------+-------|
| 80486DX- | 50MHz | Closed | Closed | 1 & | 1 & | 1 & 2 |
| 50 MHz | | | | 2, 3 | 2 | |
| | | | | & 4 | | |
|------------+-------+--------+--------+------+------+-------|
| 80486DX- | 66MHz | Closed | Open | 1 & | 2 & | 1 & 2 |
| 33 MHz | | | | 2, 3 | 3 | |
| | | | | & 4 | | |
|------------+-------+--------+--------+------+------+-------|
| 80486DX- | 33MHz | Closed | Open | 1 & | 1 & | 1 & 2 |
| 33 MHz | | | | 2, 3 | 2 | |
| | | | | & 4 | | |
|------------+-------+--------+--------+------+------+-------|
| 80486DX- | 50MHz | Open | Open | 1 & | 2 & | 1 & 2 |
| 25 MHz | | | | 2, 3 | 3 | |
| | | | | & 4 | | |
|------------+-------+--------+--------+------+------+-------|
| 80486DX- | 25MHz | Open | Open | 1 & | 1 & | 1 & 2 |
| 25 MHz | | | | 2, 3 | 2 | |
| | | | | & 4 | | |
|------------+-------+--------+--------+------+------+-------|
| 80486SX- | 50MHz | Open | Open | 2 & | 2 & | Open |
| 25 MHz | | | | 3 | 3 | |
|------------+-------+--------+--------+------+------+-------|
| 80486SX- | 25MHz | Open | Open | 2 & | 1 & | Open |
| 25 MHz | | | | 3 | 2 | |
|------------+-------+--------+--------+------+------+-------|
| 80486SX- | 40MHz | Open | Open | 2 & | 2 & | Open |
| 20 MHz | | | | 3 | 3 | |
|------------+-------+--------+--------+------+------+-------|
| 80486SX- | 20MHz | Open | Open | 2 & | 1 & | Open |
| 20 MHz | | | | 3 | 2 | |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+