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# MYLEX CORPORATION
MNE486 System Board
Processor 80486DX
Processor Speed 25/33/50(internal)/66(internal)MHz
Chip Set Intel
Max. Onboard 32MB
DRAM
Cache 128KB
BIOS Mylex
Dimensions 330mm x 218mm
I/O Options Bus mouse, floppy drive interface, IDE
interface, serial port, parallel port
NPU Options 4167
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| Speaker | P11 | Serial port | P20 |
|---------------------+----------+----------------+----------|
| Power LED & keylock | P12 | Parallel port | P21 |
|---------------------+----------+----------------+----------|
| Turbo LED | P13 | Bus mouse | P22 |
|---------------------+----------+----------------+----------|
| Reset switch | P14 | IDE interface | P23 |
|---------------------+----------+----------------+----------|
| Floppy drive | P18 | IDE interface | P24 |
| interface | | LED | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | External SRAM cache enabled | J1 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | External SRAM cache disabled | J1 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J2 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J13 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J14 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J15 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J16 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Serial port 1 select COM1 | J17 | pins 1 & 2 |
| | interrupt IRQ4 at 3F8-3FF | | closed |
|---+----------------------------------+--------+------------|
| | Serial port 1 select COM2 | J17 | pins 2 & 3 |
| | interrupt IRQ3 at 2F8-2FF | | closed |
|---+----------------------------------+--------+------------|
| » | Parallel port select LPT1 | J18 | pins 1 & 2 |
| | interrupt IRQ7 at 378-37F | | closed |
|---+----------------------------------+--------+------------|
| | Parallel port select LPT2 | J18 | pins 2 & 3 |
| | interrupt IRQ5 at 278-27F | | closed |
|---+----------------------------------+--------+------------|
| » | On-board interface ports enabled | J19 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | On-board interface ports | J19 | pins 2 & 3 |
| | disabled | | closed |
|---+----------------------------------+--------+------------|
| » | IDE factory diagnostics disabled | J20 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | IDE factory diagnostics enabled | J20 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
|Size| J3 | J4 | J5 | J6 | J7 | J8 | J9 |J10 |J11 |J12 |
|----+-----+-----+-----+-----+-----+----+-----+----+----+----|
|1MB |Open |Open |Open |Open |Open |2 & |Open |1 & |1 & |1 & |
| | | | | | | 3 | | 2 | 2 | 2 |
|----+-----+-----+-----+-----+-----+----+-----+----+----+----|
|2MB |1 & 2|1 & 2|1 & 2|1 & 2|Open |1 & |Open |1 & |1 & |2 & |
| | | | | | | 2 | | 2 | 2 | 3 |
|----+-----+-----+-----+-----+-----+----+-----+----+----+----|
|4MB |Open |Open |Open |Open |Open |1 & |2 & 3|1 & |1 & |2 & |
| | | | | | | 2 | | 2 | 2 | 3 |
|----+-----+-----+-----+-----+-----+----+-----+----+----+----|
|8MB |1 & 2|1 & 2|1 & 2|1 & 2|Open |1 & |1 & 2|2 & |1 & |2 & |
| | | | | | | 2 | | 3 | 2 | 3 |
|----+-----+-----+-----+-----+-----+----+-----+----+----+----|
|16MB|Open |Open |Open |Open |2 & 3|1 & |1 & 2|2 & |1 & |2 & |
| | | | | | | 2 | | 3 | 2 | 3 |
|----+-----+-----+-----+-----+-----+----+-----+----+----+----|
|32MB|1 & 2|1 & 2|1 & 2|1 & 2|1 & 2|1 & |1 & 2|2 & |2 & |2 & |
| | | | | | | 2 | | 3 | 3 | 3 |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+