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# SOYO TECHNOLOGY CO., LTD.
SY-030G/H
Processor 80486SX/SL80486SX/CX486DX/U5S/80486DX/CX486DX2/AM486DX2/
80486DX2/AM486DX4/80486DX4/P24D/Pentium Overdrive
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed 100(internal)MHz
Chip Set Unidentified
Max. 256MB
Onboard
DRAM
Cache 256/512/1024KB
BIOS Award
Dimensions 330mm x 218mm
I/O 32-bit PCI slots (3), IDE interfaces (2), green PC connector
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| IDE interface | J4 | External battery | J20 |
| (primary) | | | |
|---------------+----------+----------------------+----------|
| IDE interface | J5 | Turbo switch | J21 |
| (secondary) | | | |
|---------------+----------+----------------------+----------|
| Green PC | J6 | Turbo LED | J22 |
| connector | | | |
|---------------+----------+----------------------+----------|
| Power LED & | J17 | IDE Interface LED | JP10 |
| keylock | | (primary) | |
|---------------+----------+----------------------+----------|
| Speaker | J18 | IDE interface LED | JP11 |
| | | (secondary) | |
|---------------+----------+----------------------+----------|
| Reset switch | J19 | 32-bit PCI slots | PCI1 - |
| | | | PCI3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|------------------------------------+--------+--------------|
| » | Monitor type select color | JP3 | Closed |
|---+--------------------------------+--------+--------------|
| | Monitor type select monochrome | JP3 | Open |
|---+--------------------------------+--------+--------------|
| » | CMOS memory normal operation | JP5 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| | CMOS memory clear | JP5 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP28 | pins 2 & 3, |
| | alter | | 4 & 5 closed |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP29 | N/A |
| | alter | | |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP35 | N/A |
| | alter | | |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP36 | N/A |
| | alter | | |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP37 | N/A |
| | alter | | |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP38 | N/A |
| | alter | | |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP39 | pins 1 & 2 |
| | alter | | closed |
|---+--------------------------------+--------+--------------|
| » | Factory configured - do not | JP45 | Open |
| | alter | | |
|------------------------------------------------------------|
| Note: The location of JP28 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 1MB | (1) 256K x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 2MB | (1) 512K x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 4MB | (1) 512K x | (1) 512K x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 5MB | (1) 256K x | (1) 1M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 6MB | (1) 512K x | (1) 512K x | (1) 512K x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 8MB | (1) 512K x | (1) 512K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 12MB | (1) 512K x | (1) 512K x | (1) 1M x | (1) 1M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x | (1) 1M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 2M x 36 | (1) 2M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 17MB | (1) 256K x | (1) 4M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 20MB | (1) 512K x | (1) 512K x | (1) 4M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 512K x | (1) 512K x | (1) 1M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 512K x | (1) 512K x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 16M x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 65MB | (1) 256K x | (1) 16M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 16M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 70MB | (1) 16M x | (1) 512K x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 16M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 16M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 88MB | (1) 16M x | (1) 2M x | (1) 2M x | (1) 2M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 16M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 112MB | (1) 16M x | (1) 4M x | (1) 4M x | (1) 4M x |
| | 36 | 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 |
|-------+-------------+------------+------------+------------|
| 132MB | (1) 16M x | (1) 16M x | (1) 512K x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 144MB | (1) 16M x | (1) 16M x | (1) 2M x | (1) 2M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 160MB | (1) 16M x | (1) 16M x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 160MB | (1) 16M x | (1) 8M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 192MB | (1) 16M x | (1) 16M x | (1) 16M x | |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 192MB | (1) 16M x | (1) 16M x | (1) 8M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 194MB | (1) 16M x | (1) 16M x | (1) 16M x | (1) 512K x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 200MB | (1) 16M x | (1) 16M x | (1) 16M x | (1) 2M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 208MB | (1) 16M x | (1) 16M x | (1) 16M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 224MB | (1) 16M x | (1) 16M x | (1) 16M x | (1) 8M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 256MB | (1) 16M x | (1) 16M x | (1) 16M x | (1) 16M x |
| | 36 | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 64K x 8 | NONE | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (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 | JP23 | JP24 | JP25 |
|-------+-----------------+-----------------+----------------|
| 256KB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 256KB | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 512KB | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 512KB | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 1MB | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP1 | JP2 | JP4 | JP6 | JP7 |
|---------------+------+-------+----------+-------+----------|
| 80486SX | Open | Open | 1 & 3, 2 | Open | 3 & 4 |
| | | | & 4 | | |
|---------------+------+-------+----------+-------+----------|
| SL80486SX | Open | Open | 1 & 3, 2 | Open | 3 & 4 |
| | | | & 4 | | |
|---------------+------+-------+----------+-------+----------|
| CX486DX (5v) | Open | Open | 1 & 3, 2 | 3 & 4 | 2 & 3 |
| | | | & 4 | | |
|---------------+------+-------+----------+-------+----------|
| U5S | Open | Open | 1 & 3, 2 | Open | Open |
| | | | & 4 | | |
|---------------+------+-------+----------+-------+----------|
| 80486DX (5v) | Open | Open | 1 & 3, 2 | Open | 3 & 4 |
| | | | & 4 | | |
|---------------+------+-------+----------+-------+----------|
| CX486DX2 | Open | Open | 3 & 5, 4 | 3 & 4 | 2 & 3 |
| (3.6v) | | | & 6 | | |
|---------------+------+-------+----------+-------+----------|
| CX486DX2 (4v) | Open | Open | 3 & 5, 4 | 1 & 2 | 2 & 3 |
| | | | & 6 | | |
|---------------+------+-------+----------+-------+----------|
| CX486DX2 (5v) | Open | Open | 1 & 3, 2 | 3 & 4 | 2 & 3 |
| | | | & 4 | | |
|---------------+------+-------+----------+-------+----------|
| AM486DX2 | Open | 2 & 3 | 3 & 5, 4 | 5 & 6 | 3 & 4 |
| (3.45v) | | | & 6 | | |
|---------------+------+-------+----------+-------+----------|
| 80486DX2 (5v) | Open | Open | 1 & 3, 2 | Open | 3 & 4 |
| | | | & 4 | | |
|---------------+------+-------+----------+-------+----------|
| AM486DX4 | Open | 1 & 2 | 3 & 5, 4 | 5 & 6 | 3 & 4 |
| (3.45v) | | | & 6 | | |
|---------------+------+-------+----------+-------+----------|
| 80486DX4 | Open | Open | 3 & 5, 4 | 5 & 6 | 3 & 4 |
| (3.45v) | | | & 6 | | |
|---------------+------+-------+----------+-------+----------|
| 80486DX4 (5v) | Open | Open | 1 & 3, 2 | Open | 3 & 4 |
| | | | & 4 | | |
|---------------+------+-------+----------+-------+----------|
| P24D | Open | 1 & 2 | 1 & 3, 2 | Open | 1 & 2, 3 |
| | | | & 4 | | & 4 |
|---------------+------+-------+----------+-------+----------|
| Pentium | Open | Open | 1 & 3, 2 | Open | 3 & 4 |
| Overdrive | | | & 4 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP8 | JP9 | JP15 | JP16 | JP17 |
|--------------+-------+----------+----------+-------+-------|
| 80486SX | Open | 2 & 3 | Open | 2 & 3 | Open |
|--------------+-------+----------+----------+-------+-------|
| SL80486SX | Open | 2 & 3 | Open | 2 & 3 | Open |
|--------------+-------+----------+----------+-------+-------|
| CX486DX (5v) | 2 & 3 | 1 & 2, 3 | 3 & 4 | 2 & 3 | 2 & 3 |
| | | & 4 | | | |
|--------------+-------+----------+----------+-------+-------|
| U5S | 3 & 4 | 1 & 2, 3 | 1 & 2, 3 | 2 & 3 | Open |
| | | & 4 | & 4 | | |
|--------------+-------+----------+----------+-------+-------|
| 80486DX (5v) | Open | 1 & 2, 3 | 3 & 4 | 2 & 3 | Open |
| | | & 4 | | | |
|--------------+-------+----------+----------+-------+-------|
| CX486DX2 | 2 & 3 | 1 & 2, 3 | 3 & 4 | 2 & 3 | 2 & 3 |
| (3.6v) | | & 4 | | | |
|--------------+-------+----------+----------+-------+-------|
| CX486DX2 | 2 & 3 | 1 & 2, 3 | 3 & 4 | 2 & 3 | 2 & 3 |
| (4v) | | & 4 | | | |
|--------------+-------+----------+----------+-------+-------|
| CX486DX2 | 2 & 3 | 1 & 2, 3 | 3 & 4 | 2 & 3 | 2 & 3 |
| (5v) | | & 4 | | | |
|--------------+-------+----------+----------+-------+-------|
| AM486DX2 | Open | 1 & 2, 3 | 3 & 4 | 2 & 3 | Open |
| (3.45v) | | & 4 | | | |
|--------------+-------+----------+----------+-------+-------|
| 80486DX2 | Open | 1 & 2, 3 | 3 & 4 | 2 & 3 | Open |
| (5v) | | & 4 | | | |
|--------------+-------+----------+----------+-------+-------|
| AM486DX4 | Open | 1 & 2, 3 | 3 & 4 | 2 & 3 | Open |
| (3.45v) | | & 4 | | | |
|--------------+-------+----------+----------+-------+-------|
| 80486DX4 | Open | 1 & 2, 3 | 3 & 4 | 2 & 3 | Open |
| (3.45v) | | & 4 | | | |
|--------------+-------+----------+----------+-------+-------|
| 80486DX4 | Open | 1 & 2, 3 | 3 & 4 | 2 & 3 | Open |
| (5v) | | & 4 | | | |
|--------------+-------+----------+----------+-------+-------|
| P24D | Open | 1 & 2, 3 | 3 & 4 | 1 & 2 | 1 & 2 |
| | | & 4 | | | |
|--------------+-------+----------+----------+-------+-------|
| Pentium | 1 & 2 | 1 & 2, 3 | 2 & 3 | 1 & 2 | 1 & 2 |
| Overdrive | | & 4 | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP18 | JP19 | JP20 |
|---------------+--------------+--------------+--------------|
| 80486SX | pins 1 & 2 | Open | pins 2 & 3 |
| | closed | | closed |
|---------------+--------------+--------------+--------------|
| SL80486SX | pins 1 & 2 | Open | pins 2 & 3 |
| | closed | | closed |
|---------------+--------------+--------------+--------------|
| CX486DX (5v) | pins 1 & 2 | Open | pins 1 & 2 |
| | closed | | closed |
|---------------+--------------+--------------+--------------|
| U5S | pins 2 & 3 | Open | pins 4 & 5 |
| | closed | | closed |
|---------------+--------------+--------------+--------------|
| 80486DX (5v) | pins 1 & 2 | Open | pins 2 & 3 |
| | closed | | closed |
|---------------+--------------+--------------+--------------|
| CX486DX2 | pins 1 & 2 | Open | pins 1 & 2 |
| (3.6v) | closed | | closed |
|---------------+--------------+--------------+--------------|
| CX486DX2 (4v) | pins 1 & 2 | Open | pins 1 & 2 |
| | closed | | closed |
|---------------+--------------+--------------+--------------|
| CX486DX2 (5v) | pins 1 & 2 | Open | pins 1 & 2 |
| | closed | | closed |
|---------------+--------------+--------------+--------------|
| AM486DX2 | pins 1 & 2 | Open | pins 2 & 3 |
| (3.45v) | closed | | closed |
|---------------+--------------+--------------+--------------|
| 80486DX2 (5v) | pins 1 & 2 | Open | pins 2 & 3 |
| | closed | | closed |
|---------------+--------------+--------------+--------------|
| AM486DX4 | pins 1 & 2 | Open | pins 2 & 3 |
| (3.45v) | closed | | closed |
|---------------+--------------+--------------+--------------|
| 80486DX4 | pins 1 & 2 | Open | pins 2 & 3 |
| (3.45v) | closed | | closed |
|---------------+--------------+--------------+--------------|
| 80486DX4 (5v) | pins 1 & 2 | Open | pins 2 & 3 |
| | closed | | closed |
|---------------+--------------+--------------+--------------|
| P24D | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
| | closed | closed | closed |
|---------------+--------------+--------------+--------------|
| Pentium | pins 1 & 2 | Open | pins 2 & 3 |
| Overdrive | closed | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | JP21 | JP22 | JP44 |
|---------------+--------------+--------------+--------------|
| 80486SX | pins 1 & 2 | pins 4 & 5 | Open |
| | closed | closed | |
|---------------+--------------+--------------+--------------|
| SL80486SX | pins 1 & 2 | pins 4 & 5 | Open |
| | closed | closed | |
|---------------+--------------+--------------+--------------|
| CX486DX (5v) | Open | pins 2 & 3 | Open |
| | | closed | |
|---------------+--------------+--------------+--------------|
| U5S | Open | Open | Open |
|---------------+--------------+--------------+--------------|
| 80486DX (5v) | pins 1 & 2 | pins 4 & 5 | Open |
| | closed | closed | |
|---------------+--------------+--------------+--------------|
| CX486DX2 | Open | pins 2 & 3 | Open |
| (3.6v) | | closed | |
|---------------+--------------+--------------+--------------|
| CX486DX2 (4v) | Open | pins 2 & 3 | Open |
| | | closed | |
|---------------+--------------+--------------+--------------|
| CX486DX2 (5v) | Open | pins 2 & 3 | Open |
| | | closed | |
|---------------+--------------+--------------+--------------|
| AM486DX2 | pins 1 & 2 | pins 4 & 5 | Open |
| (3.45v) | closed | closed | |
|---------------+--------------+--------------+--------------|
| 80486DX2 (5v) | pins 1 & 2 | pins 4 & 5 | Open |
| | closed | closed | |
|---------------+--------------+--------------+--------------|
| AM486DX4 | pins 1 & 2 | pins 4 & 5 | Open |
| (3.45v) | closed | closed | |
|---------------+--------------+--------------+--------------|
| 80486DX4 | pins 1 & 2 | pins 4 & 5 | Open |
| (3.45v) | closed | closed | |
|---------------+--------------+--------------+--------------|
| 80486DX4 (5v) | pins 1 & 2 | pins 4 & 5 | Open |
| | closed | closed | |
|---------------+--------------+--------------+--------------|
| P24D | pins 2 & 3 | pins 4 & 5 | Open |
| | closed | closed | |
|---------------+--------------+--------------+--------------|
| Pentium | Open | pins 1 & 2 | pins 1 & 2 |
| Overdrive | | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP30 | JP31 | JP32 | JP33 |
|-----------+--------+---------+---------+-------------------|
| 25MHz | Open | Open | Open | pins 1 & 2 closed |
|-----------+--------+---------+---------+-------------------|
| 33MHz | Open | Closed | Closed | pins 1 & 2 closed |
|-----------+--------+---------+---------+-------------------|
| 40MHz | Open | Open | Closed | pins 2 & 3 closed |
|-----------+--------+---------+---------+-------------------|
| 50iMHz | Open | Open | Open | pins 1 & 2 closed |
|-----------+--------+---------+---------+-------------------|
| 50MHz | Open | Closed | Open | pins 2 & 3 closed |
|-----------+--------+---------+---------+-------------------|
| 66iMHz | Open | Closed | Closed | pins 1 & 2 closed |
|-----------+--------+---------+---------+-------------------|
| 75iMHz | Open | Open | Open | pins 1 & 2 closed |
|-----------+--------+---------+---------+-------------------|
| 80iMHz | Open | Open | Closed | pins 2 & 3 closed |
|-----------+--------+---------+---------+-------------------|
| 100iMHz | Open | Closed | Closed | pins 1 & 2 closed |
+------------------------------------------------------------+