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# J-BOND COMPUTER SYSTEMS CORPORATION
486 CACHE
Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set ETEQ
Max. Onboard DRAM 32MB
Cache 64/256KB
BIOS AMI
Dimensions 221mm x 254mm
I/O Options None
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| External battery | BATT | Reset switch | RST |
|---------------------+----------+----------------+----------|
| Power LED & keylock | KEYLC | Speaker | SPK |
|---------------------+----------+----------------+----------|
| Turbo LED | LED | Turbo switch | TBS |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CPU speed select switchable at | JP1 | Closed |
| | keyboard | | |
|---+----------------------------------+--------+------------|
| | CPU speed select switchable at | JP1 | Open |
| | turbo switch | | |
|---+----------------------------------+--------+------------|
| » | Battery type select internal | JP7 | Closed |
|---+----------------------------------+--------+------------|
| | Battery type select external | JP7 | Open |
|---+----------------------------------+--------+------------|
| » | CPU speed select iOSC/2 | JP50 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CPU speed select iOSC/1 | JP50 | pins 1 & 2 |
| | | | 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 |
|------------------+--------------------+--------------------|
| 17MB | (4) 4M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 20MB | (4) 1M x 9 | (4) 4M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG |
|------------------+--------------------+--------------------|
| 64KB | (8) 8K x 8 | (1) 8K x 8 |
|------------------+--------------------+--------------------|
| 256KB | (8) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHEJUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP2 | JP3 | JP4 | JP5 |
|-------+--------+-----------------+--------+----------------|
| 64KB | Open | pins 1 & 2 | Open | pins 1 & 2 |
| | | closed | | closed |
|-------+--------+-----------------+--------+----------------|
| 256KB | Closed | pins 2 & 3 | Closed | pins 2 & 3 |
| | | closed | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JX1 | JX2 | JX3 | JX4 | JX5 |
|----------+---------+---------+---------+---------+---------|
| 80486SX | Open | Open | Open | Closed | Open |
|----------+---------+---------+---------+---------+---------|
| 80487SX | Open | Closed | Closed | Open | Closed |
|----------+---------+---------+---------+---------+---------|
| ODP486SX | Open | Closed | Closed | Open | Closed |
|----------+---------+---------+---------+---------+---------|
| 80486DX | Closed | Open | Closed | Open | Closed |
|----------+---------+---------+---------+---------+---------|
| 80486DX2 | Closed | Open | Closed | Open | Closed |
+------------------------------------------------------------+