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# SOYO COMPUTER CO., LTD.
SY-25 T
Processor UMCU5S/AM486SX/80486SX/CX486DX/AM486DX/AM486DXL/
80486DX/SL80486DX/CX486DX2/AM486DX2/80486DX2/
SL80486DX2/AM486DX4/SL80486DX4/P24D/P24T
Processor 25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/
Speed 100(internal)MHz
Chip Set Unidentified
Video Chip None
Set
Maximum 128MB
Onboard
Memory
Maximum None
Video
Memory
Cache 256KB
BIOS Award
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 |
|------------------+----------+-------------------+----------|
| Power LED & | J17 | Turbo switch | J21 |
| keylock | | | |
|------------------+----------+-------------------+----------|
| Speaker | J18 | Turbo LED | J22 |
|------------------+----------+-------------------+----------|
| Reset switch | J19 | Green PC | JP25 |
| | | connector | |
|------------------+----------+-------------------+----------|
| External battery | J20 | 32-bit VESA local | SL1 – |
| | | bus slots | SL3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|----------------------------------+-------+-----------------|
| » | CMOS memory normal operation | J20 | Pins 2 & 3 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | CMOS memory clear | J20 | Pins 3 & 4 |
| | | | closed |
|---+------------------------------+-------+-----------------|
| | Battery type select external | J20 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+---------------+-------------+------------+----------|
| 1MB | (1) 256K x 36 | None | None | None |
|------+---------------+-------------+------------+----------|
| 2MB | (1) 512K x 36 | None | None | None |
|------+---------------+-------------+------------+----------|
| 2MB | (1) 256K x 36 | (1) 256K x | None | None |
| | | 36 | | |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 1M x 36 | None | None | None |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 256K x 36 | (1) 256K x | (1) 512K x | None |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 512K x 36 | (1) 512K x | None | None |
| | | 36 | | |
|------+---------------+-------------+------------+----------|
| 5MB | (1) 256K x 36 | (1) 1M x 36 | None | None |
|------+---------------+-------------+------------+----------|
| 6MB | (1) 256K x 36 | (1) 256K x | (1) 1M x | None |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 6MB | (1) 512K x 36 | (1) 1M x 36 | None | None |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 256K x 36 | (1) 256K x | (1) 512K x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 512K x 36 | (1) 512K x | (1) 1M x | None |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 2M x 36 | None | None | None |
|------+---------------+-------------+------------+----------|
| 10MB | (1) 256K x 36 | (1) 256K x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 12MB | (1) 512K x 36 | (1) 512K x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 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 |
|------+---------------+-------------+------------+----------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | None | None |
|------+---------------+-------------+------------+----------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+---------------+-------------+------------+----------|
| 16MB | (1) 4M x 36 | None | None | None |
|------+---------------+-------------+------------+----------|
| 17MB | (1) 256K x 36 | (1) 4M x 36 | None | None |
|------+---------------+-------------+------------+----------|
| 18MB | (1) 256K x 36 | (1) 256K x | (1) 4M x | None |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 18MB | (1) 512K x 36 | (1) 4M x 36 | None | None |
|------+---------------+-------------+------------+----------|
| 20MB | (1) 512K x 36 | (1) 512K x | (1) 4M x | None |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 20MB | (1) 1M x 36 | (1) 2M x 36 | (1) 2M x | None |
| | | | 36 | |
|------+---------------+-------------+------------+----------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | None | None |
|------+---------------+-------------+------------+----------|
| 24MB | (1) 512K x 36 | (1) 512K x | (1) 1M x | (1) 4M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x | None |
| | | | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|---------+---------------+-----------+-----------+----------|
| 24MB | (1) 1M x 36 | (1) 1M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|---------+---------------+-----------+-----------+----------|
| 24MB | (1) 2M x 36 | (1) 4M x | None | None |
| | | 36 | | |
|---------+---------------+-----------+-----------+----------|
| 24MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | None |
| | | 36 | 36 | |
|---------+---------------+-----------+-----------+----------|
| 28MB | (1) 1M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|---------+---------------+-----------+-----------+----------|
| 32MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|---------+---------------+-----------+-----------+----------|
| 32MB | (1) 2M x 36 | (1) 2M x | (1) 4M x | None |
| | | 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 36 | (1) 512K | (1) 4M x | (1) 4M x |
| | | x 36 | 36 | 36 |
|---------+---------------+-----------+-----------+----------|
| 36MB | (1) 1M x 36 | (1) 4M x | (1) 4M x | None |
| | | 36 | 36 | |
|---------+---------------+-----------+-----------+----------|
| 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) 2M x 36 | (1) 2M x | (1) 2M 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) 2M x 36 | (1) 2M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|---------+---------------+-----------+-----------+----------|
| 48MB | (1) 2M x 36 | (1) 2M x | (1) 8M 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) 4M x 36 | (1) 4M x | (1) 8M x | None |
| | | 36 | 36 | |
|---------+---------------+-----------+-----------+----------|
| 64MB | (1) 16M x 36 | None | None | None |
|---------+---------------+-----------+-----------+----------|
| 64MB | (1) 8M x 36 | (1) 8M x | None | None |
| | | 36 | | |
|---------+---------------+-----------+-----------+----------|
| 65MB | (1) 256K x 36 | (1) 16M x | None | None |
| | | 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 | |
|---------+---------------+-----------+-----------+----------|
| 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 | |
|---------+---------------+-----------+-----------+----------|
| 80MB | (1) 2M x 36 | (1) 2M x | (1) 8M x | (1) 8M x |
| | | 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 | |
|---------+---------------+-----------+-----------+----------|
| 128MB | (1) 16M x 36 | (1) 16M x | None | None |
| | | 36 | | |
|---------+---------------+-----------+-----------+----------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|------------------------------------------------------------|
| Note: Board also accepts x 32 SIMMs. Do not use any |
| other combination of SIMM configuration. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+--------------+--------------+-----------------|
| 256KB (A) | (4) 32K x 8 | (4) 32K x 8 | (1) 16K/32K x 8 |
|------------+--------------+--------------+-----------------|
| 256KB (B) | (4) 64K x 8 | None | (1) 16K/32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP9 | JP10 |
|------------+--------------------------+--------------------|
| 256KB (A) | Pins 2 & 3 closed | Pins 2 & 3 closed |
|------------+--------------------------+--------------------|
| 256KB (B) | Pins 1 & 2, 3 & 4 closed | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP4 | JP5 | JP6 |
|---------------+--------------+--------------+--------------|
| 25MHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 40MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 50iMHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 66iMHz | Closed | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 75iMHz | Open | Open | Closed |
|---------------+--------------+--------------+--------------|
| 80iMHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 100iMHz | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP11 | JP12 | JP13 | JP14 | JP15 |
|-----------------+--------+--------+--------+-------+-------|
| UMC U5S | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|-----------------+--------+--------+--------+-------+-------|
| AM486SX | Open | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|-----------------+--------+--------+--------+-------+-------|
| 80486SX | Open | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|-----------------+--------+--------+--------+-------+-------|
| CX486DX (5v) | 1 & 2, | 1 & 2, | 1 & 2, | 2 & 3 | 2 & 3 |
| | 3 & 4 | 3 & 4, | 3 & 4 | | |
| | | 5 & 6 | | | |
|-----------------+--------+--------+--------+-------+-------|
| AM486DX | Open | 2 & 3 | 1 & 2, | 2 & 3 | 2 & 3 |
| | | | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| AM486DXL (5v) | 2 & 3 | 2 & 3 | 1 & 2, | 2 & 3 | 2 & 3 |
| | | | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| 80486DX | Open | 2 & 3 | 1 & 2, | 2 & 3 | 2 & 3 |
| | | | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| SL80486DX | 1 & 2 | 1 & 2 | 1 & 2, | 2 & 3 | 2 & 3 |
| | | | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| CX486DX2 (5v) | 1 & 2, | 1 & 2, | 1 & 2, | 2 & 3 | 2 & 3 |
| | 3 & 4 | 3 & 4, | 3 & 4 | | |
| | | 5 & 6 | | | |
|-----------------+--------+--------+--------+-------+-------|
| CX486DX2-66 | 1 & 2, | 1 & 2, | 1 & 2, | 1 & 2 | 1 & 2 |
| (3.6v) | 3 & 4 | 3 & 4, | 3 & 4 | | |
| | | 5 & 6 | | | |
|-----------------+--------+--------+--------+-------+-------|
| CX486DX2-80 | 1 & 2, | 1 & 2, | 1 & 2, | 1 & 2 | 1 & 2 |
| (4v) | 3 & 4 | 3 & 4, | 3 & 4 | | |
| | | 5 & 6 | | | |
|-----------------+--------+--------+--------+-------+-------|
| AM486DX2 | Open | 2 & 3 | 1 & 2, | 2 & 3 | 2 & 3 |
| | | | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| AM486DX2-80 | Open | 2 & 3 | 1 & 2, | 1 & 2 | 1 & 2 |
| (3.45v) | | | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| AM486DXL2 (5v) | 2 & 3 | 2 & 3 | 1 & 2, | 2 & 3 | 2 & 3 |
| | | | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| 80486DX2 | Open | 2 & 3 | 1 & 2, | 2 & 3 | 2 & 3 |
| | | | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| SL80486DX2 | 1 & 2 | 1 & 2 | 1 & 2, | 2 & 3 | 2 & 3 |
| | | | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| AM486DX4 | Open | 2 & 3 | 1 & 2, | 1 & 2 | 1 & 2 |
| (3.45v) | | | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| SL80486DX4 | 1 & 2 | 1 & 2 | 1 & 2, | 1 & 2 | 1 & 2 |
| (3.45v) | | | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| SL80486DX4 (5v) | 1 & 2 | 1 & 2 | 1 & 2, | 2 & 3 | 2 & 3 |
| | | | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| P24D | 1 & 2, | 1 & 2, | 1 & 2, | 2 & 3 | 2 & 3 |
| | 4 & 5 | 4 & 5 | 3 & 4 | | |
|-----------------+--------+--------+--------+-------+-------|
| P24T | 1 & 2 | 1 & 2 | 1 & 2, | 2 & 3 | 2 & 3 |
| | | | 3 & 4 | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP16 | JP17 | JP18 | JP19 |
|-----------------+-------+------------+----------+----------|
| UMC U5S | 2 & 3 | 3 & 4 | 1 & 2 | Open |
|-----------------+-------+------------+----------+----------|
| AM486SX | 2 & 3 | Open | Open | Open |
|-----------------+-------+------------+----------+----------|
| 80486SX | 2 & 3 | Open | Open | Open |
|-----------------+-------+------------+----------+----------|
| CX486DX (5v) | 2 & 3 | 1 & 2 | 2 & 3, 4 | 2 & 3 |
| | | | & 5 | |
|-----------------+-------+------------+----------+----------|
| AM486DX | 2 & 3 | 1 & 2 | Open | Open |
|-----------------+-------+------------+----------+----------|
| AM486DXL (5v) | 2 & 3 | 1 & 2, 3 & | 1 & 2 | Open |
| | | 4 | | |
|-----------------+-------+------------+----------+----------|
| 80486DX | 2 & 3 | 1 & 2 | Open | Open |
|-----------------+-------+------------+----------+----------|
| SL80486DX | 2 & 3 | 1 & 2 | 5 & 6 | 1 & 2, 3 |
| | | | | & 4 |
|-----------------+-------+------------+----------+----------|
| CX486DX2 (5v) | 2 & 3 | 1 & 2 | 2 & 3, 4 | 2 & 3 |
| | | | & 5 | |
|-----------------+-------+------------+----------+----------|
| CX486DX2-66 | 1 & 2 | 1 & 2 | 2 & 3, 4 | 2 & 3 |
| (3.6v) | | | & 5 | |
|-----------------+-------+------------+----------+----------|
| CX486DX2-80 | 1 & 2 | 1 & 2 | 2 & 3, 4 | 2 & 3 |
| (4v) | | | & 5 | |
|-----------------+-------+------------+----------+----------|
| AM486DX2 | 2 & 3 | 1 & 2 | Open | Open |
|-----------------+-------+------------+----------+----------|
| AM486DX2-80 | 1 & 2 | 1 & 2 | Open | Open |
| (3.45v) | | | | |
|-----------------+-------+------------+----------+----------|
| AM486DXL2 (5v) | 2 & 3 | 1 & 2, 3 & | 1 & 2 | Open |
| | | 4 | | |
|-----------------+-------+------------+----------+----------|
| 80486DX2 | 2 & 3 | 1 & 2 | Open | Open |
|-----------------+-------+------------+----------+----------|
| SL80486DX2 | 2 & 3 | 1 & 2 | 5 & 6 | 1 & 2, 3 |
| | | | | & 4 |
|-----------------+-------+------------+----------+----------|
| AM486DX4 | 1 & 2 | 1 & 2 | Open | Open |
| (3.45v) | | | | |
|-----------------+-------+------------+----------+----------|
| SL80486DX4 | 1 & 2 | 1 & 2 | 5 & 6 | 1 & 2, 3 |
| (3.45v) | | | | & 4 |
|-----------------+-------+------------+----------+----------|
| SL80486DX4 (5v) | 2 & 3 | 1 & 2 | 5 & 6 | 1 & 2, 3 |
| | | | | & 4 |
|-----------------+-------+------------+----------+----------|
| P24D | 2 & 3 | 1 & 2 | 3 & 4, 5 | 1 & 2, 3 |
| | | | & 6 | & 4 |
|-----------------+-------+------------+----------+----------|
| P24T | 2 & 3 | 2 & 3 | 5 & 6 | 1 & 2, 3 |
| | | | | & 4 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP20 | JP26 | JP27 |
|---------------------+--------+---------+-------------------|
| UMC U5S | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| AM486SX | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| 80486SX | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| CX486DX (5v) | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| AM486DX | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| AM486DXL (5v) | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| 80486DX | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| SL80486DX | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| CX486DX2 (5v) | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| CX486DX2-66 (3.6v) | Open | Open | Pins 3 & 4 closed |
|---------------------+--------+---------+-------------------|
| CX486DX2-80 (4v) | Open | Open | Pins 5 & 6 closed |
|---------------------+--------+---------+-------------------|
| AM486DX2 | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| AM486DX2-80 (3.45v) | Open | Closed | Pins 1 & 2 closed |
|---------------------+--------+---------+-------------------|
| AM486DXL2 (5v) | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| 80486DX2 | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| SL80486DX2 | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| AM486DX4 (3.45v) | Open | Open | Pins 1 & 2 closed |
|---------------------+--------+---------+-------------------|
| SL80486DX4 (3.45v) | Open | Open | Pins 1 & 2 closed |
|---------------------+--------+---------+-------------------|
| SL80486DX4 (5v) | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| P24D | Open | Open | Open |
|---------------------+--------+---------+-------------------|
| P24T | Open | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+