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# MICRONICS COMPUTERS, INC.
JX30G
Processor 80486SX/80486DX/80486DX2/Pentium Overdrive
Processor 25/33/50(internal)/66(internal)MHz
Speed
Chip Set Unidentified
Max. Onboard 64MB
DRAM
Cache 64/128/256KB
BIOS AMI
Dimensions 330mm x 218mm
I/O Options 32-bit VESA local bus slots (2), floppy drive
interface, IDE interface, parallel port, PS/2
mouse port, serial ports (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | CN1 | Speaker | J30 |
|-------------------+----------+------------------+----------|
| Floppy drive | CN2 | Power LED & | J31 |
| interface | | keylock | |
|-------------------+----------+------------------+----------|
| IDE interface | CN3 | Turbo LED | W18 |
|-------------------+----------+------------------+----------|
| External battery | J8 | Turbo switch | W19 |
|-------------------+----------+------------------+----------|
| Serial port 2 | J9 | Reset switch | W20 |
|-------------------+----------+------------------+----------|
| Internal keyboard | J13 | IDE interface | W21 |
| connector | | LED | |
|-------------------+----------+------------------+----------|
| Serial port 1 | J14 | 32-bit VESA | SL1 & |
| | | Local bus slots | SL2 |
|-------------------+----------+------------------+----------|
| Parallel port | J16 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Clock type select Motorola | W1 | Open |
| | 126818 | | |
|---+----------------------------------+--------+------------|
| | Clock type select Dallas | W1 | Closed |
|---+----------------------------------+--------+------------|
| » | Monitor type select color | W2 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select monochrome | W2 | Open |
|---+----------------------------------+--------+------------|
| » | On board mouse disabled (IRQ12) | W3 | Open |
|---+----------------------------------+--------+------------|
| | On board mouse enabled (IRQ12) | W3 | Closed |
|---+----------------------------------+--------+------------|
| » | Parity enabled | W4 | Closed |
|---+----------------------------------+--------+------------|
| | Parity disabled | W4 | Open |
|---+----------------------------------+--------+------------|
| » | Dallas clock normal operation | W5 | Open |
|---+----------------------------------+--------+------------|
| | Dallas clock discharge | W5 | Closed |
|---+----------------------------------+--------+------------|
| » | Parallel port mode | W7 | pins 1 & 2 |
| | unidirectional | | closed |
|---+----------------------------------+--------+------------|
| | Parallel port mode bidirectional | W7 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | W8 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | W8 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | W9 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | CPU type select | W12 | pins 2 & 3 |
| | 80486DX/DX2/Pentium Overdrive | | closed |
|---+----------------------------------+--------+------------|
| | CPU type select 80486SX | W12 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | PQFP CPU enabled | W13 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | PQFP CPU disabled | W13 | pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 52MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W10 | W11 | W22 | W23 | W24 |
|----------+----------+----------+---------+--------+--------|
| 64KB | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 |
|----------+----------+----------+---------+--------+--------|
| 128KB | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 |
|----------+----------+----------+---------+--------+--------|
| 256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (WRITE BACK) |
|------------------------------------------------------------|
| Size | W16 | W17 |
|------------+------------------------+----------------------|
| 64KB | pins 1 & 2 closed | pins 1 & 2 closed |
|------------+------------------------+----------------------|
| 128KB | pins 1 & 2 closed | pins 2 & 3 closed |
|------------+------------------------+----------------------|
| 256KB | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------------------------------------------------|
| Note: If write through is selected, open jumpers W16 & |
| W17. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | SW1/1 | SW1/2 | SW1/3 | SW1/4 |
|------------+-----------+-----------+-----------+-----------|
| 25MHz | Off | On | Off | Off |
|------------+-----------+-----------+-----------+-----------|
| 33MHz | On | On | Off | Off |
|------------+-----------+-----------+-----------+-----------|
| 50iMHz | Off | On | Off | Off |
|------------+-----------+-----------+-----------+-----------|
| 66iMHz | On | On | Off | Off |
+------------------------------------------------------------+