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# SKYWELL TECHNOLOGY CORPORATION, LTD.
SW-486VM
Processor UMCSX/80486DX/AM486DX2/80486DX2/TI486DX4/AM486DX4/
8046DX4/CX5X86/AM5X86
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set VIA
Video Chip None
Set
Maximum 128MB (EDO supported)
Onboard
Memory
Maximum None
Video
Memory
Cache 128/256/512/1024KB
BIOS Award
Dimensions 250mm x 220mm
I/O 32-bit PCI slots (3), floppy drive interface, game interface, IDE
Options interfaces (2), parallel port, PS/2 mouse port, PS/2 mouse
interface, serial ports (2)
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| PS/2 mouse | CN1 | External battery | JBA1 |
| interface | | | |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | CN3 | External battery | JBA2 |
|-------------------+----------+------------------+----------|
| Game interface | CN5 | Power LED & | JW1 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| Parallel port | CN7 | Turbo LED | JW2 |
|-------------------+----------+------------------+----------|
| Floppy drive | CN8 | Speaker | JW3 |
| interface | | | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN9 | Turbo switch | JW4 |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN10 | Reset switch | JW5 |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN11 | IDE interface | JW6 |
| | | LED | |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN12 | 32-bit PCI slots | PC1 - |
| | | | PC3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | J104 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J105 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | J106 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JIDE | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JG1 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JG2 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JG3 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JG4 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JM5 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JMS2 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JT1 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JT4 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | None | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 512K x | None | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | None | None |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 512K x | (1) 256K x | None | None |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | None |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 512K x | None | None |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 256K x | (1) 256K x | None |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 512K x | (1) 512K x | None | None |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | None | None |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 512K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 512K x | (1) 512K x | None |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 1M x 36 | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | None |
| | | 36 | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 512K x | None | None |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | (1) 512K x | (1) 512K x | None |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 512K x | (1) 1M x 36 | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 256K x | (1) 512K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 2M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 512K x | (1) 512K x | None |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 512K x | (1) 512K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 2M x 36 | (1) 256K x | None | None |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | None |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 256K x | (1) 2M x 36 | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 2M x 36 | (1) 256K x | (1) 256K x | None |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 2M x 36 | (1) 512K x | None | None |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 1M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | (1) 1M x 36 | (1) 1M x | None |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 10MB | (1) 512K x | (1) 2M x 36 | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 11MB | (1) 2M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 2M x 36 | (1) 512K x | (1) 512K x | None |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 2M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 2M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 14MB | (1) 2M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 14MB | (1) 512K x | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 256K x | None | None |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 256K x | (1) 2M x 36 | (1) 2M x | None |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 256K x | (1) 4M x 36 | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | None |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 512K x | None | None |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 512K x | (1) 2M x 36 | (1) 2M x | None |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 512K x | (1) 4M x 36 | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 512K x | (1) 512K x | None |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 2M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 22MB | (1) 4M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 2M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 25MB | (1) 256K x | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 26MB | (1) 512K x | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 1M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 8M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 2M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 8M x 36 | (1) 256K x | None | None |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 256K x | (1) 4M x 36 | (1) 4M x | None |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 8M x 36 | (1) 256K x | (1) 256K x | None |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 8M x 36 | (1) 512K x | None | None |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 512K x | (1) 4M x 36 | (1) 4M x | None |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 512K x | (1) 8M x 36 | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 35MB | (1) 8M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 8M x 36 | (1) 512K x | (1) 512K x | None |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 8M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 38MB | (1) 8M x 36 | (1) 512K x | (1) 512K x | (1) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 8M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 8M x 36 | (1) 2M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 2M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 2M x 36 | (1) 8M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 44MB | (1) 8M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 8M x 36 | (1) 2M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 8M x 36 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 49MB | (1) 256K x | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 50MB | (1) 512K x | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 52MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 56MB | (1) 8M x 36 | (1) 2M x 36 | (1) 2M x | (1) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 56MB | (1) 2M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 65MB | (1) 256K x | (1) 8M x 36 | (1) 8M x | None |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 66MB | (1) 512K x | (1) 8M x 36 | (1) 8M x | None |
| | 36 | | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 8M x | (1) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 2M x 36 | (1) 8M x | (1) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 8M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 8M x | (1) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 97MB | (1) 256K x | (1) 8M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 98MB | (1) 512K x | (1) 8M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 100MB | (1) 1M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 104MB | (1) 2M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 112MB | (1) 4M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 16M x | (1) 16M x | None | None |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------------+---------------+---------------+--------------|
| 128KB | (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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JS1 | JS2 | JS3 | JS4 | JS5 | JS6 |
|-----------+--------+-------+-------+-------+-------+-------|
| 128KB | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 |
|-----------+--------+-------+-------+-------+-------+-------|
| 256KB (A) | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|-----------+--------+-------+-------+-------+-------+-------|
| 256KB (B) | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|-----------+--------+-------+-------+-------+-------+-------|
| 512KB (A) | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|-----------+--------+-------+-------+-------+-------+-------|
| 512KB (B) | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
|-----------+--------+-------+-------+-------+-------+-------|
| 1MB | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JCK1 | JCK2 | JCK3 | JCK4 |
|---------+------------+------------+------------+-----------|
| 25MHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 33MHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 40MHz | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 50iMHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 50MHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 66iMHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 75iMHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| 100iMHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & |
| | closed | closed | closed | 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JC1 | JC2 | JC3 | JC4 | JC5 | JT2 | JT3 |
|----------+-----+-----+-----+--------+--------+------+------|
| UMC SX | 1 & | 2 & | 1 & | Open | Open | Open | Open |
| | 2 | 3 | 2 | | | | |
|----------+-----+-----+-----+--------+--------+------+------|
| 80486DX2 | 1 & | 1 & | 1 & | Open | Open | Open | Open |
| | 2 | 2 | 2 | | | | |
|----------+-----+-----+-----+--------+--------+------+------|
| AM486DX2 | 1 & | 1 & | 1 & | Open | Closed | Open | 2 & |
| | 2 | 2 | 2 | | | | 3 |
|----------+-----+-----+-----+--------+--------+------+------|
| 80486DX2 | 1 & | 1 & | 1 & | Open | Open | Open | Open |
| | 2 | 2 | 2 | | | | |
|----------+-----+-----+-----+--------+--------+------+------|
| TI486DX4 | 1 & | 1 & | 1 & | Open | Open | Open | Open |
| | 2 | 2 | 2 | | | | |
|----------+-----+-----+-----+--------+--------+------+------|
| AM486DX4 | 1 & | 1 & | 1 & | Open | Open | Open | Open |
| | 2 | 2 | 2 | | | | |
|----------+-----+-----+-----+--------+--------+------+------|
| 80486DX4 | 1 & | 1 & | 1 & | Closed | Open | Open | Open |
| | 2 | 2 | 2 | | | | |
|----------+-----+-----+-----+--------+--------+------+------|
| CX 5X86 | 1 & | 1 & | 1 & | Open | Open | Open | 2 & |
| | 2 | 2 | 2 | | | | 3 |
|----------+-----+-----+-----+--------+--------+------+------|
| AM 5X86 | 1 & | 1 & | 1 & | Open | Open | Open | Open |
| | 2 | 2 | 2 | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JPW1 | JPW2 |
|------------------+--------------------+--------------------|
| 3.3v | Pins 7 & 8 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 3.45v | Pins 5 & 6 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 3.6v | Pins 3 & 4 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 4v | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 5v | Open | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BATTERY SELECTION |
|------------------------------------------------------------|
| Setting | JBA1 | JBA2 |
|-----------------------+--------------------+---------------|
| External | Pins 3 & 4 closed | Open |
|-----------------------+--------------------+---------------|
| Internal | Pins 2 & 3 closed | Open |
|-----------------------+--------------------+---------------|
| CMOS normal operation | Pins 2 & 3 closed | Closed |
|-----------------------+--------------------+---------------|
| CMOS memory clear | Pins 3 & 4 closed | N/A |
+------------------------------------------------------------+