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# UNIDENTIFIED
486UL (VER. 2)
Processor 80486SX/80487SX/ODP486/80486DX/80486DX2
Processor Speed 25/33/40/50(internal)/50/66(internal)MHz
Chip Set UMC
Video Chip Set None
Maximum Onboard 64MB
Memory
Maximum Video Memory None
Cache 64/128/256KB
BIOS AMI/Award
Dimensions 250mm x 220mm
I/O Options 32-bit VESA local bus slots (3)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J1 | Power LED & | J5 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Turbo LED | J2 | Reset switch | J6 |
|------------------+----------+-------------------+----------|
| Turbo switch | J3 | 32-bit VESA local | SL1 - |
| | | bus slots | SL3 |
|------------------+----------+-------------------+----------|
| Speaker | J4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-----------------------------------------+-------+----------|
| | Turbo switch enabled/controlled by | J3 | Open |
| | kbd CTRL, ALT - (low), CTRL, ALT + | | |
| | (high) | | |
|---+-------------------------------------+-------+----------|
| | Turbo switch disabled | J3 | Closed |
|---+-------------------------------------+-------+----------|
| » | Any VESA card installed | JP9 | 1 & 2 |
|---+-------------------------------------+-------+----------|
| | Weitek Power 9000 VESA card | JP9 | 2 & 3 |
| | installed | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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) 1M x 9 | (4) 256K 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 |
|------------------+--------------------+--------------------|
| 64MB | (4) 16M x 9 | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 RESISTOR CONFIGURATION |
|------------------------------------------------------------|
| Size | RN6 | RN7 | RN8 |
|------------+---------------+---------------+---------------|
| 64KB | Installed | Not installed | Not installed |
|------------+---------------+---------------+---------------|
| 128KB | Not installed | Installed | Not installed |
|------------+---------------+---------------+---------------|
| 256KB | Not installed | Not installed | Installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | J22 | JP3 | JP4 | JP5 |
|----------+-------------------+---------+---------+---------|
| 25MHz | Pins 1 & 2 closed | Closed | Open | Open |
|----------+-------------------+---------+---------+---------|
| 33MHz | Pins 1 & 2 closed | Closed | Closed | Closed |
|----------+-------------------+---------+---------+---------|
| 40MHz | Pins 1 & 2 closed | Closed | Closed | Open |
|----------+-------------------+---------+---------+---------|
| 50iMHz | Pins 1 & 2 closed | Closed | Open | Open |
|----------+-------------------+---------+---------+---------|
| 50MHz | Pins 2 & 3 closed | Open | Open | Closed |
|----------+-------------------+---------+---------+---------|
| 66iMHz | Pins 1 & 2 closed | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP1 | JP2 |
|------------+--------------------------+--------------------|
| 80486SX | Pins 2 & 3 closed | Open |
|------------+--------------------------+--------------------|
| 80487SX | Pins 1 & 2, 3 & 4 closed | Pins 2 & 3 closed |
|------------+--------------------------+--------------------|
| ODP486 | Pins 1 & 2, 3 & 4 closed | Pins 2 & 3 closed |
|------------+--------------------------+--------------------|
| 80486DX | Pins 1 & 2, 3 & 4 closed | Pins 1 & 2 closed |
|------------+--------------------------+--------------------|
| 80486DX2 | Pins 1 & 2, 3 & 4 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS WAIT STATE SELECTION |
|------------------------------------------------------------|
| Setting | JP13 |
|---------------------------------+--------------------------|
| | 0 | Open |
|--------+------------------------+--------------------------|
| » | 1 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL-BUS SPEED SELECTION |
|------------------------------------------------------------|
| CPU speed | JP12 |
|-------------------------------+----------------------------|
| <= 33MHz | Open |
|-------------------------------+----------------------------|
| >33 MHz | Closed |
+------------------------------------------------------------+