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# PC WARE INTERNATIONAL, INC.
MB-U498WB
Processor UMC U5/80486SX/AM486DX/80486DX/CX486DX2(M7)/AM486DX2/
80486DX2/SL80486DX2/AM486DX4/SL80486DX4/P24D/P24T/ CX5X86
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed 100(internal)/120(internal)MHz
Chip Set OPTI
Video Chip None
Set
Maximum 64MB
Onboard
Memory
Maximum None
Video
Memory
Cache 64/128/256/512/1024KB
BIOS AMI
Dimensions 254mm x 218mm
I/O 32-bit VESA local bus slots (3), green PC connector
Options
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | JP1 | Reset switch | JP20 |
|------------------+----------+-------------------+----------|
| Power LED & | JP15 | Turbo switch | JP22 |
| keylock | | | |
|------------------+----------+-------------------+----------|
| Speaker | JP18 | Green PC | JP23 |
| | | connector | |
|------------------+----------+-------------------+----------|
| Turbo LED | JP19 | 32-bit VESA local | SL1 - |
| | | bus slots | SL3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| | Battery type select internal | JP1 | Closed |
|---+---------------------------------+-------+--------------|
| | Battery type select external | JP1 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP1 | Pins 3 & 4 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP2 | Open |
| | alter | | |
|---+---------------------------------+-------+--------------|
| | Flash BIOS voltage select 12v | JP3 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | Flash BIOS voltage select 5v | JP3 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP36 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 1MB | (1) 256K x 36 | None | None |
|------------+---------------+---------------+---------------|
| 1MB | None | (1) 256K x 36 | None |
|------------+---------------+---------------+---------------|
| 2MB | (1) 256K x 36 | (1) 256K x 36 | None |
|------------+---------------+---------------+---------------|
| 2MB | None | (1) 256K x 36 | (4) 256K x 9 |
|------------+---------------+---------------+---------------|
| 3MB | (1) 256K x 36 | (1) 256K x 36 | (4) 256K x 9 |
|------------+---------------+---------------+---------------|
| 4MB | (1) 1M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 4MB | None | (1) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 5MB | (1) 1M x 36 | (1) 256K x 36 | None |
|------------+---------------+---------------+---------------|
| 6MB | (1) 256K x 36 | (1) 256K x 36 | (1) 1M x 9 |
|------------+---------------+---------------+---------------|
| 6MB | (1) 1M x 36 | (1) 256K x 36 | (4) 256K x 9 |
|------------+---------------+---------------+---------------|
| 8MB | (1) 2M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 9MB | (1) 2M x 36 | (1) 256K x 36 | None |
|------------+---------------+---------------+---------------|
| 9MB | (1) 1M x 36 | (1) 256K x 36 | (1) 1M x 9 |
|------------+---------------+---------------+---------------|
| 9MB | (1) 1M x 36 | (1) 1M x 36 | (4) 256K x 9 |
|------------+---------------+---------------+---------------|
| 12MB | (1) 2M x 36 | (1) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 9 |
|------------+---------------+---------------+---------------|
| 16MB | (1) 4M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 16MB | None | (1) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 17MB | (1) 4M x 36 | (1) 256K x 36 | None |
|------------+---------------+---------------+---------------|
| 18MB | (1) 4M x 36 | (1) 256K x 36 | (4) 256K x 9 |
|------------+---------------+---------------+---------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 21MB | (1) 1M x 36 | (1) 256K x 36 | (1) 4M x 9 |
|------------+---------------+---------------+---------------|
| 21MB | (1) 4M x 36 | (1) 256K x 36 | (1) 1M x 9 |
|------------+---------------+---------------+---------------|
| 21MB | (1) 4M x 36 | (1) 1M x 36 | (4) 256K x 9 |
|------------+---------------+---------------+---------------|
| 24MB | (1) 2M x 36 | (1) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x 9 |
|------------+---------------+---------------+---------------|
| 25MB | (1) 4M x 36 | (1) 2M x 36 | (4) 256K x 9 |
|------------+---------------+---------------+---------------|
| 28MB | (1) 4M x 36 | (1) 2M x 36 | (1) 1M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 32MB | (1) 8M x 36 | None | None |
|------------+---------------+---------------+---------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 33MB | (1) 8M x 36 | (1) 256K x 36 | None |
|------------+---------------+---------------+---------------|
| 33MB | (1) 4M x 36 | (1) 4M x 36 | (4) 256K x 9 |
|------------+---------------+---------------+---------------|
| 36MB | (1) 8M x 36 | (1) 1M x 36 | None |
|------------+---------------+---------------+---------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 36MB | (1) 4M x 36 | (1) 1M x 36 | (1) 4M x 9 |
|------------+---------------+---------------+---------------|
| 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x 9 |
|------------+---------------+---------------+---------------|
| 40MB | (1) 4M x 36 | (1) 2M x 36 | (1) 4M x 9 |
|------------+---------------+---------------+---------------|
| 48MB | (1) 8M x 36 | (1) 4M x 36 | None |
|------------+---------------+---------------+---------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 9 |
|------------+---------------+---------------+---------------|
| 52MB | (1) 4M x 36 | (1) 8M x 36 | (1) 1M x 9 |
|------------+---------------+---------------+---------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 | None |
|------------+---------------+---------------+---------------|
| 64MB | (1) 4M x 36 | (1) 8M x 36 | (1) 4M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------------+---------------+---------------+--------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|-------------+---------------+---------------+--------------|
| 128KB (A) | (1) 16K x 8 | (1) 16K x 8 | (1) 8K x 8 |
|-------------+---------------+---------------+--------------|
| 128KB (B) | (4) 32K x 8 | None | (1) 8K x 8 |
|-------------+---------------+---------------+--------------|
| 256KB (A) | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 256KB (B) | (4) 64K x 8 | None | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 512KB (A) | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 512KB (B) | (4) 128K x 8 | None | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 1MB | (4) 128K x 8 | (4) 128K x 8 | (1) 64K x 8 |
|------------------------------------------------------------|
| Note: The location of banks 0 & 1 are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP5 | JP10 | JP11 | JP12 | JP13 | JP14 |
|-------+--------+-------+--------+--------+--------+--------|
| 64KB | 2 & 3 | 2 & 3 | Open | Open | Open | Open |
|-------+--------+-------+--------+--------+--------+--------|
| 128KB | 2 & 3 | 2 & 3 | Open | Open | Open | Closed |
| (A) | | | | | | |
|-------+--------+-------+--------+--------+--------+--------|
| 128KB | 1 & 2 | 1 & 2 | Open | Open | Open | Closed |
| (B) | | | | | | |
|-------+--------+-------+--------+--------+--------+--------|
| 256KB | 2 & 3 | 2 & 3 | Open | Open | Closed | Closed |
| (A) | | | | | | |
|-------+--------+-------+--------+--------+--------+--------|
| 256KB | 1 & 2, | 1 & 2 | Open | Closed | Closed | Closed |
| (B) | 3 & 4 | | | | | |
|-------+--------+-------+--------+--------+--------+--------|
| 512KB | 2 & 3, | 2 & 3 | Open | Closed | Closed | Closed |
| (A) | 4 & 5 | | | | | |
|-------+--------+-------+--------+--------+--------+--------|
| 512KB | 1 & 2, | 1 & 2 | Open | Closed | Closed | Closed |
| (B) | 3 & 4, | | | | | |
| | 5 & 6 | | | | | |
|-------+--------+-------+--------+--------+--------+--------|
| 1MB | 2 & 3, | 2 & 3 | Closed | Closed | Closed | Closed |
| | 4 & 5, | | | | | |
| | 6 & 7 | | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP6 | JP7 | JP8 |
|---------------+--------------+--------------+--------------|
| 25MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 40MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 50iMHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50MHz | Closed | Open | Open |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 75iMHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 80iMHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 100iMHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 120iMHz | Open | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP27 | JP28 | JP29 |
|---------------+--------------+--------------+--------------|
| UMC U5 | Open | 2 & 3 | 2 & 3 |
|---------------+--------------+--------------+--------------|
| 80486SX | Open | 2 & 3 | Open |
|---------------+--------------+--------------+--------------|
| AM486DX | Open | 2 & 3 | Open |
|---------------+--------------+--------------+--------------|
| 80486DX | Open | 2 & 3 | Open |
|---------------+--------------+--------------+--------------|
| CX486DX2 (M7) | 2 & 3 | 1 & 2, 3 & | 1 & 2, 3 & |
| | | 4, 5 & 6 | 4, 5 & 6 |
|---------------+--------------+--------------+--------------|
| AM486DX2 | Open | 2 & 3 | Open |
|---------------+--------------+--------------+--------------|
| 80486DX2 | Open | 2 & 3 | Open |
|---------------+--------------+--------------+--------------|
| SL80486DX2 | 1 & 2, 3 & 4 | 1 & 2 | 1 & 2 |
|---------------+--------------+--------------+--------------|
| AM486DX4 | 1 & 2, 3 & 4 | 1 & 2, 4 & 5 | 1 & 2, 4 & 5 |
|---------------+--------------+--------------+--------------|
| SL80486DX4 | 1 & 2, 3 & 4 | 1 & 2 | 1 & 2 |
|---------------+--------------+--------------+--------------|
| P24D | 1 & 2, 3 & 4 | 1 & 2, 4 & 5 | 1 & 2, 4 & 5 |
|---------------+--------------+--------------+--------------|
| P24T | 1 & 2, 3 & 4 | 1 & 2 | 1 & 2 |
|---------------+--------------+--------------+--------------|
| CX5X86 | 1 & 2, 3 & 4 | 1 & 2, 4 & 5 | 1 & 2, 4 & 5 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP30 | JP32 | JP33 |
|----------------+---------------+-----------+---------------|
| UMC U5 | 1 & 2 | 3 & 4 | 2 & 3 |
|----------------+---------------+-----------+---------------|
| 80486SX | Open | Open | 2 & 3 |
|----------------+---------------+-----------+---------------|
| AM486DX | Open | 1 & 2 | 1 & 2, 3 & 4 |
|----------------+---------------+-----------+---------------|
| 80486DX | Open | 1 & 2 | 1 & 2, 3 & 4 |
|----------------+---------------+-----------+---------------|
| CX486DX2 (M7) | 2 & 3, 4 & 5 | 1 & 2 | 1 & 2, 3 & 4 |
|----------------+---------------+-----------+---------------|
| AM486DX2 | Open | 1 & 2 | 1 & 2, 3 & 4 |
|----------------+---------------+-----------+---------------|
| 80486DX2 | Open | 1 & 2 | 1 & 2, 3 & 4 |
|----------------+---------------+-----------+---------------|
| SL80486DX2 | 5 & 6 | 1 & 2 | 1 & 2, 3 & 4 |
|----------------+---------------+-----------+---------------|
| AM486DX4 | 3 & 4, 5 & 6 | 1 & 2 | 1 & 2, 3 & 4 |
|----------------+---------------+-----------+---------------|
| SL80486DX4 | 5 & 6 | 1 & 2 | 1 & 2, 3 & 4 |
|----------------+---------------+-----------+---------------|
| P24D | 3 & 4, 5 & 6 | 1 & 2 | 1 & 2, 3 & 4 |
|----------------+---------------+-----------+---------------|
| P24T | 5 & 6 | 2 & 3 | 1 & 2, 3 & 4 |
|----------------+---------------+-----------+---------------|
| CX5X86 | 3 & 4, 5 & 6 | 1 & 2 | 1 & 2, 3 & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION (AMD) |
|------------------------------------------------------------|
| Multiplier | JP34 |
|-------------------------------+----------------------------|
| 2x | Closed |
|-------------------------------+----------------------------|
| 3x | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION (INTEL) |
|------------------------------------------------------------|
| Multiplier | JP31 |
|----------------------------+-------------------------------|
| 2x | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 2.5x | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 3x | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP24 | JP25 | JP26 | JP35 |
|---------+---------------+------------+------------+--------|
| 3.3v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Closed |
| | closed | closed | closed | |
|---------+---------------+------------+------------+--------|
| 4v | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Open |
| | closed | closed | closed | |
|---------+---------------+------------+------------+--------|
| 5v | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Open |
| | closed | closed | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS WAIT STATE SELECTION |
|------------------------------------------------------------|
| Setting | JP17 |
|-------------------------------+----------------------------|
| 0 | Open |
|-------------------------------+----------------------------|
| 1 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL-BUS SPEED SELECTION |
|------------------------------------------------------------|
| Setting | JP16 |
|-------------------------------+----------------------------|
| <= 33MHz | Open |
|-------------------------------+----------------------------|
| >33 MHz | Closed |
+------------------------------------------------------------+