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# UNIDENTIFIED
VL/ISA-PB486P3
Processor 80486SX/CX486DX/80486DX/80486DX2/80486DX4/P24D/Pentium
Overdrive
Processor 25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set Unidentified
Max. 64MB
Onboard
DRAM
Cache 64/128/256KB
BIOS AMI
Dimensions 254mm x 220mm
I/O 32-bit VESA local bus slots (3), green PC connector
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+-----------+---------------------+----------|
| Turbo switch | CN1 (pins | Green PC connector | JP32 |
| | 1 - 2) | | |
|---------------+-----------+---------------------+----------|
| Turbo LED | CN1 (pins | Reset switch | S1 |
| | 3 - 4) | | |
|---------------+-----------+---------------------+----------|
| Power LED & | J2 | 32-bit VESA local | SL1 - |
| keylock | | bus slots | SL3 |
|---------------+-----------+---------------------+----------|
| Speaker | JP18 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------+--------+----------------|
| » | CPU voltage select 5v | JP1 | Closed |
|---+------------------------------+--------+----------------|
| | CPU voltage select 3.3v | JP1 | Open |
|---+------------------------------+--------+----------------|
| » | CMOS memory normal operation | JP26 | pins 2 & 3 |
| | | | closed |
|---+------------------------------+--------+----------------|
| | CMOS memory clear | JP26 | pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 256K x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 2MB | NONE | (1) 512K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 4MB | (4) 1M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 4MB | NONE | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 4MB | NONE | (1) 512K x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 6MB | NONE | (1) 512K x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 8MB | (4) 1M x 9 | NONE | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 8MB | NONE | (1) 2M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 8MB | NONE | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 10MB | NONE | (1) 512K x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 12MB | (4) 1M x 9 | NONE | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 12MB | NONE | (1) 1M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (4) 4M x 9 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 16MB | NONE | (1) 2M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | NONE | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 20MB | (4) 1M x 9 | NONE | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 20MB | NONE | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | (4) 4M x 9 | NONE | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | NONE | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | NONE | (1) 8M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 64MB | NONE | (1) 8M x 36 | (1) 8M x 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 | JP10 | JP11 | JP13 |
|------------+-------------+-------------+-------------------|
| 64KB | Open | Open | pins 2 & 3 closed |
|------------+-------------+-------------+-------------------|
| 128KB | Open | Closed | pins 1 & 2 closed |
|------------+-------------+-------------+-------------------|
| 256KB | Closed | Closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP3 | JP4 | JP5 | JP6 | JP7 |
|-------------------+-------+--------+-------+-------+-------|
| 80486SX | Open | Open | Open | 1 & 2 | Open |
|-------------------+-------+--------+-------+-------+-------|
| SL80486SX | Open | Open | Open | 1 & 2 | Open |
|-------------------+-------+--------+-------+-------+-------|
| CX486DX (1x) | 1 & 2 | Open | 2 & 3 | 2 & 3 | Open |
|-------------------+-------+--------+-------+-------+-------|
| CX486DX (2x) | 1 & 2 | Open | 2 & 3 | 2 & 3 | Open |
|-------------------+-------+--------+-------+-------+-------|
| 80486DX | 1 & 2 | Open | 2 & 3 | 1 & 2 | Open |
|-------------------+-------+--------+-------+-------+-------|
| SL80486DX | 1 & 2 | Open | 2 & 3 | 1 & 2 | Open |
|-------------------+-------+--------+-------+-------+-------|
| 80486DX2 | 1 & 2 | Open | 2 & 3 | 1 & 2 | Open |
|-------------------+-------+--------+-------+-------+-------|
| SL80486DX2 | 1 & 2 | Open | 2 & 3 | 1 & 2 | Open |
|-------------------+-------+--------+-------+-------+-------|
| 80486DX4 (2x) | 1 & 2 | Open | 2 & 3 | 1 & 2 | Open |
|-------------------+-------+--------+-------+-------+-------|
| 80486DX4 (2.5x) | 1 & 2 | Open | 2 & 3 | 1 & 2 | Open |
|-------------------+-------+--------+-------+-------+-------|
| 80486DX4 (3x) | 1 & 2 | Open | 2 & 3 | 1 & 2 | Open |
|-------------------+-------+--------+-------+-------+-------|
| P24D (WB) | 1 & 2 | Open | 2 & 3 | 1 & 2 | 1 & 2 |
|-------------------+-------+--------+-------+-------+-------|
| P24D (WT) | 1 & 2 | Open | 2 & 3 | 1 & 2 | 2 & 3 |
|-------------------+-------+--------+-------+-------+-------|
| Pentium Overdrive | 1 & 2 | Closed | 2 & 3 | 1 & 2 | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP8 | JP9 | JP12 | JP22 | JP23 |
|------------------+-------+-------+--------+-------+--------|
| 80486SX | 2 & 3 | Open | Open | 1 & 2 | Open |
|------------------+-------+-------+--------+-------+--------|
| SL80486SX | 2 & 3 | Open | Open | 1 & 2 | Open |
|------------------+-------+-------+--------+-------+--------|
| CX486DX (1x) | 1 & 2 | 1 & 2 | Open | 1 & 2 | Open |
|------------------+-------+-------+--------+-------+--------|
| CX486DX (2x) | 1 & 2 | 1 & 2 | Open | 1 & 2 | Open |
|------------------+-------+-------+--------+-------+--------|
| 80486DX | 1 & 2 | Open | Open | 1 & 2 | Open |
|------------------+-------+-------+--------+-------+--------|
| SL80486DX | 1 & 2 | Open | Open | 1 & 2 | Open |
|------------------+-------+-------+--------+-------+--------|
| 80486DX2 | 1 & 2 | Open | Open | 1 & 2 | Open |
|------------------+-------+-------+--------+-------+--------|
| SL80486DX2 | 1 & 2 | Open | Open | 1 & 2 | Open |
|------------------+-------+-------+--------+-------+--------|
| 80486DX4 (2x) | 1 & 2 | Open | Open | 1 & 2 | Open |
|------------------+-------+-------+--------+-------+--------|
| 80486DX4 (2.5x) | 1 & 2 | Open | Open | 1 & 2 | Open |
|------------------+-------+-------+--------+-------+--------|
| 80486DX4 (3x) | 1 & 2 | Open | Open | 1 & 2 | Open |
|------------------+-------+-------+--------+-------+--------|
| P24D (WB) | 1 & 2 | 2 & 3 | Closed | 1 & 2 | Closed |
|------------------+-------+-------+--------+-------+--------|
| P24D (WT) | 1 & 2 | 2 & 3 | Closed | 1 & 2 | Closed |
|------------------+-------+-------+--------+-------+--------|
| Pentium | 1 & 2 | 2 & 3 | Open | 1 & 2 | Open |
| Overdrive | | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP24 | JP25 | JP27 | JP36 | JP40 | JP43 |
|------------+--------+--------+------+------+--------+------|
| 80486SX | Open | Open | Open | 1 & | Closed | Open |
| | | | | 2 | | |
|------------+--------+--------+------+------+--------+------|
| SL80486SX | Closed | Closed | Open | 2 & | Closed | Open |
| | | | | 3 | | |
|------------+--------+--------+------+------+--------+------|
| CX486DX | Open | Open | 1 & | 1 & | Closed | Open |
| (1x) | | | 2 | 2 | | |
|------------+--------+--------+------+------+--------+------|
| CX486DX | Open | Open | 2 & | 1 & | Closed | Open |
| (2x) | | | 3 | 2 | | |
|------------+--------+--------+------+------+--------+------|
| 80486DX | Open | Open | Open | 1 & | Closed | Open |
| | | | | 2 | | |
|------------+--------+--------+------+------+--------+------|
| SL80486DX | Closed | Closed | Open | 2 & | Closed | Open |
| | | | | 3 | | |
|------------+--------+--------+------+------+--------+------|
| 80486DX2 | Open | Open | Open | 1 & | Closed | Open |
| | | | | 2 | | |
|------------+--------+--------+------+------+--------+------|
| SL80486DX2 | Closed | Closed | Open | 2 & | Closed | Open |
| | | | | 3 | | |
|------------+--------+--------+------+------+--------+------|
| 80486DX4 | Closed | Closed | Open | 2 & | Closed | 1 & |
| (2x) | | | | 3 | | 2 |
|------------+--------+--------+------+------+--------+------|
| 80486DX4 | Closed | Closed | Open | 2 & | Closed | 2 & |
| (2.5x) | | | | 3 | | 3 |
|------------+--------+--------+------+------+--------+------|
| 80486DX4 | Closed | Closed | Open | 2 & | Closed | Open |
| (3x) | | | | 3 | | |
|------------+--------+--------+------+------+--------+------|
| P24D (WB) | Closed | Closed | Open | 2 & | Closed | Open |
| | | | | 3 | | |
|------------+--------+--------+------+------+--------+------|
| P24D (WT) | Closed | Closed | Open | 2 & | Closed | Open |
| | | | | 3 | | |
|------------+--------+--------+------+------+--------+------|
| Pentium | Open | Open | Open | 1 & | Closed | Open |
| Overdrive | | | | 2 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP38 | JP39 |
|--------------------+-------------------+-------------------|
| 25MHz | Open | Closed |
|--------------------+-------------------+-------------------|
| 33MHz | Closed | Open |
|--------------------+-------------------+-------------------|
| 40MHz | Open | Open |
|--------------------+-------------------+-------------------|
| 50iMHz | Open | Closed |
|--------------------+-------------------+-------------------|
| 50MHz | Closed | Closed |
|--------------------+-------------------+-------------------|
| 66iMHz | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | JP33 |
|-------------------------------+----------------------------|
| 0 wait states | Open |
|-------------------------------+----------------------------|
| 1 wait state | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP34 |
|-------------------------------+----------------------------|
| <= 33MHz | Open |
|-------------------------------+----------------------------|
| > 33MHz | Closed |
+------------------------------------------------------------+