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# SOYO COMPUTER CO., LTD.
SY-30 A/B/C
Processor CX486S/AM486SX/80486SX/SL80486SX/CX486DX/AM486DX/
80486DX/SL80486DX/AM486DX2/80486DX2/SL80486DX2/
80486DX4/P24D/P24T
Processor 25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set Unidentified
Video Chip None
Set
Maximum 128MB
Onboard
Memory
Maximum None
Video Memory
Cache 256/512/1024KB
BIOS Award
Dimensions 254mm x 218mm
I/O Options 32-bit VESA local bus slots (2), 32-bit PCI slots
(4), green PC connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Power LED & | J17 | Green PC connector | JP6 |
| keylock | | (SYNCEN) | |
|---------------+----------+----------------------+----------|
| Speaker | J18 | Green PC connector | JP7 |
| | | (HSYNCH) | |
|---------------+----------+----------------------+----------|
| Reset switch | J19 | Green PC | JP8 |
| | | connector(VSYNCH) | |
|---------------+----------+----------------------+----------|
| External | J20 | Green PC LED | JP18 |
| battery | | | |
|---------------+----------+----------------------+----------|
| Turbo switch | J21 | Green PC connector | JP42 |
|---------------+----------+----------------------+----------|
| Turbo LED | J22 | 32-bit PCI slots | PC1 – |
| | | | PC4 |
|---------------+----------+----------------------+----------|
| Green PC | JP2 | 32-bit VESA local | SL1 & |
| connector | | bus slots | SL2 |
| (GPORT) | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|------------------------------------+-------+---------------|
| » | Monitor type select monochrome | JP3 | Open |
|---+--------------------------------+-------+---------------|
| | Monitor type select EGA/VGA | JP3 | Closed |
|---+--------------------------------+-------+---------------|
| » | CMOS memory normal operation | JP5 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+-------+---------------|
| | CMOS memory clear | JP5 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM 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) 256K x 9 | (4) 4M 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 |
|------------------+--------------------+--------------------|
| 80MB | (4) 4M x 9 | (4) 16M x 9 |
|------------------+--------------------+--------------------|
| 128MB | (4) 16M x 9 | (4) 16M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 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) 128K x 8 | None | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB (B) | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 128K x 8 | (4) 128K x 8 | (1) 128K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP13 | JP14 | JP33 |
|-----------+----------------+---------------+---------------|
| 256KB (A) | Pins 1 & 2 | Any setting | Pins 1 & 2 |
| | closed | | closed |
|-----------+----------------+---------------+---------------|
| 256KB (B) | Pins 2 & 3 | Any setting | Pins 1 & 2 |
| | closed | | closed |
|-----------+----------------+---------------+---------------|
| 512KB (A) | Pins 2 & 3 | Any setting | Pins 2 & 3 |
| | closed | | closed |
|-----------+----------------+---------------+---------------|
| 512KB (B) | Any setting | Pins 1 & 2 | Pins 2 & 3 |
| | | closed | closed |
|-----------+----------------+---------------+---------------|
| 1MB | Any setting | Pins 2 & 3 | Pins 2 & 3 |
| | | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP34 | JP35 | JP36 | JP39 |
|------------+-----------+-----------+-----------+-----------|
| 25MHz | Closed | Open | Open | Closed |
|------------+-----------+-----------+-----------+-----------|
| 33MHz | Closed | Closed | Closed | Open |
|------------+-----------+-----------+-----------+-----------|
| 40MHz | Closed | Closed | Open | Open |
|------------+-----------+-----------+-----------+-----------|
| 50iMHz | Closed | Open | Open | Closed |
|------------+-----------+-----------+-----------+-----------|
| 50MHz | Open | Open | Closed | Open |
|------------+-----------+-----------+-----------+-----------|
| 66iMHz | Closed | Closed | Closed | Open |
|------------+-----------+-----------+-----------+-----------|
| 75iMHz | Closed | Open | Open | Closed |
|------------+-----------+-----------+-----------+-----------|
| 100iMHz | Closed | Closed | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP31 | JP32 | JP40 | JP41 | JP45 |
|-------------+-----------+--------+--------+--------+-------|
| CX486S | 4 & 5 | 5 & 6 | 2 & 3 | 2 & 3 | 2 & 3 |
|-------------+-----------+--------+--------+--------+-------|
| AM486SX | Open | Open | Open | 2 & 3 | 1 & 2 |
|-------------+-----------+--------+--------+--------+-------|
| 80486SX | Open | Open | Open | 2 & 3 | 1 & 2 |
|-------------+-----------+--------+--------+--------+-------|
| SL80486SX | 3 & 4, 5 | Open | 1 & 2 | 2 & 3 | 2 & 3 |
| | & 6 | | | | |
|-------------+-----------+--------+--------+--------+-------|
| CX486DX | 4 & 5 | 5 & 6 | 2 & 3 | 1 & 2, | 2 & 3 |
| | | | | 3 & 4 | |
|-------------+-----------+--------+--------+--------+-------|
| AM486DX | Open | Open | Open | 1 & 2, | 1 & 2 |
| | | | | 3 & 4 | |
|-------------+-----------+--------+--------+--------+-------|
| 80486DX | Open | Open | Open | 1 & 2, | 1 & 2 |
| | | | | 3 & 4 | |
|-------------+-----------+--------+--------+--------+-------|
| SL80486DX | 3 & 4, 5 | Open | 1 & 2 | 1 & 2, | 2 & 3 |
| | & 6 | | | 3 & 4 | |
|-------------+-----------+--------+--------+--------+-------|
| AM486DX2 | Open | Open | Open | 1 & 2, | 1 & 2 |
| | | | | 3 & 4 | |
|-------------+-----------+--------+--------+--------+-------|
| 80486DX2 | Open | Open | Open | 1 & 2, | 1 & 2 |
| | | | | 3 & 4 | |
|-------------+-----------+--------+--------+--------+-------|
| SL80486DX2 | 3 & 4, 5 | Open | 1 & 2 | 1 & 2, | 2 & 3 |
| | & 6 | | | 3 & 4 | |
|-------------+-----------+--------+--------+--------+-------|
| 80486DX4 | 3 & 4, 5 | Open | 1 & 2 | 1 & 2, | 2 & 3 |
| | & 6 | | | 3 & 4 | |
|-------------+-----------+--------+--------+--------+-------|
| P24D | 3 & 4, 5 | 2 & 3, | 1 & 2, | 1 & 2, | 2 & 3 |
| | & 6 | 4 & 5 | 3 & 4 | 3 & 4 | |
|-------------+-----------+--------+--------+--------+-------|
| P24T | 5 & 6 | 3 & 4 | 1 & 2 | 1 & 2, | 2 & 3 |
| | | | | 3 & 4 | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP46 | JP52 | JP53 | JP54 | JP63 |
|------------+-------------+-------+--------+-------+--------|
| CX486S | 1 & 3, 2 & | Open | Closed | 1 & 2 | Closed |
| | 4 | | | | |
|------------+-------------+-------+--------+-------+--------|
| AM486SX | 1 & 3, 2 & | Open | Open | Open | Open |
| | 4 | | | | |
|------------+-------------+-------+--------+-------+--------|
| 80486SX | 1 & 3, 2 & | Open | Open | Open | Open |
| | 4 | | | | |
|------------+-------------+-------+--------+-------+--------|
| SL80486SX | 1 & 3, 2 & | Open | Open | Open | Open |
| | 4 | | | | |
|------------+-------------+-------+--------+-------+--------|
| CX486DX | 1 & 3, 2 & | 2 & 3 | Open | 1 & 2 | Closed |
| | 4 | | | | |
|------------+-------------+-------+--------+-------+--------|
| AM486DX | 1 & 3, 2 & | 2 & 3 | Open | Open | Open |
| | 4 | | | | |
|------------+-------------+-------+--------+-------+--------|
| 80486DX | 1 & 3, 2 & | 2 & 3 | Open | Open | Open |
| | 4 | | | | |
|------------+-------------+-------+--------+-------+--------|
| SL80486DX | 1 & 3, 2 & | 2 & 3 | Open | Open | Open |
| | 4 | | | | |
|------------+-------------+-------+--------+-------+--------|
| AM486DX2 | 1 & 3, 2 & | 2 & 3 | Open | Open | Open |
| | 4 | | | | |
|------------+-------------+-------+--------+-------+--------|
| 80486DX2 | 1 & 3, 2 & | 2 & 3 | Open | Open | Open |
| | 4 | | | | |
|------------+-------------+-------+--------+-------+--------|
| SL80486DX2 | 1 & 3, 2 & | 2 & 3 | Open | Open | Open |
| | 4 | | | | |
|------------+-------------+-------+--------+-------+--------|
| 80486DX4 | 3 & 5, 4 & | 2 & 3 | Open | Open | Open |
| | 6 | | | | |
|------------+-------------+-------+--------+-------+--------|
| P24D | 1 & 3, 2 & | 2 & 3 | Open | 2 & 3 | Open |
| | 4 | | | | |
|------------+-------------+-------+--------+-------+--------|
| P24T | 1 & 3, 2 & | 1 & 2 | Open | 1 & 2 | Open |
| | 4 | | | | |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION (80486DX4 ONLY) |
|------------------------------------------------------------|
| Multiplier | JP64 |
|----------------------------+-------------------------------|
| 2x | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 2.5x | Pins 4 & 5 closed |
|----------------------------+-------------------------------|
| 3x | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| WAIT STATE SELECTION |
|------------------------------------------------------------|
| Setting | JP38 |
|-------------------------------+----------------------------|
| | 0 | Open |
|------+------------------------+----------------------------|
| » | 1 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL-BUS SPEED SELECTION |
|------------------------------------------------------------|
| Setting | JP37 |
|---------------------------------+--------------------------|
| | <= 33MHz | Open |
|----+----------------------------+--------------------------|
| » | >33 MHz | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI BUS CLOCK SELECTION |
|------------------------------------------------------------|
| Setting | JP20 | JP27 |
|--------------------+------------------+--------------------|
| ASYNCH | Closed | Pins 2 & 3 closed |
|--------------------+------------------+--------------------|
| SYNCH | Open | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI TRIGGER SELECTION |
|------------------------------------------------------------|
| Setting | JP9 (PC3) | JP10 (PC4) | JP11 (PC1) | JP12 |
| | | | | (PC2) |
|---------+------------+------------+------------+-----------|
| Level | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & |
| | closed | closed | closed | 2 closed |
|---------+------------+------------+------------+-----------|
| Edge | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & |
| | closed | closed | closed | 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI INTERRUPT SELECTION (IRQ14 FOR PCI1) |
|------------------------------------------------------------|
| Setting | JP10B | JP10L |
|--------------------+--------------------+------------------|
| Level | Pins 1 & 2 closed | N/A |
|--------------------+--------------------+------------------|
| Edge | N/A | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI INTERRUPT SELECTION (PCI 2, 3, 4) |
|------------------------------------------------------------|
| IRQ | Setting | JP10A | JP10B | JP10C | JP10D | JP10E |
|------+---------+--------+--------+--------+--------+-------|
| 3 | Level | Open | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 3 | Edge | Open | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 4 | Level | Open | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 4 | Edge | Open | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 5 | Level | Open | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 5 | Edge | Open | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 6 | Level | Open | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 6 | Edge | Open | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 7 | Level | Open | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 7 | Edge | Open | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 9 | Level | Open | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 9 | Edge | Open | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 10 | Level | Open | Open | Open | Open | 1 & 2 |
|------+---------+--------+--------+--------+--------+-------|
| 10 | Edge | Open | Open | Open | Open | 2 & 3 |
|------+---------+--------+--------+--------+--------+-------|
| 11 | Level | Open | Open | Open | 1 & 2 | Open |
|------+---------+--------+--------+--------+--------+-------|
| 11 | Edge | Open | Open | Open | 2 & 3 | Open |
|------+---------+--------+--------+--------+--------+-------|
| 12 | Level | Open | Open | 1 & 2 | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 12 | Edge | Open | Open | 2 & 3 | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 14 | Level | Open | 1 & 2 | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 14 | Edge | Open | 2 & 3 | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 15 | Level | 1 & 2 | Open | Open | Open | Open |
|------+---------+--------+--------+--------+--------+-------|
| 15 | Edge | 2 & 3 | Open | Open | Open | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed |
| position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PCI INTERRUPT SELECTION (PCI 2, 3, 4) |
|------------------------------------------------------------|
| IRQ |Setting | JP10F | JP10G | JP10H | JP10I |JP10J |JP10K |
|-----+--------+-------+-------+-------+-------+------+------|
| 3 | Level | Open | Open | Open | Open | Open |1 & 2 |
|-----+--------+-------+-------+-------+-------+------+------|
| 3 | Edge | Open | Open | Open | Open | Open |2 & 3 |
|-----+--------+-------+-------+-------+-------+------+------|
| 4 | Level | Open | Open | Open | Open |1 & 2 | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 4 | Edge | Open | Open | Open | Open |2 & 3 | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 5 | Level | Open | Open | Open | 1 & 2 | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 5 | Edge | Open | Open | Open | 2 & 3 | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 6 | Level | Open | Open | 1 & 2 | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 6 | Edge | Open | Open | 2 & 3 | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 7 | Level | Open | 1 & 2 | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 7 | Edge | Open | 2 & 3 | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 9 | Level | 1 & 2 | Open | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 9 | Edge | 2 & 3 | Open | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 10 | Level | Open | Open | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 10 | Edge | Open | Open | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 11 | Level | Open | Open | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 11 | Edge | Open | Open | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 12 | Level | Open | Open | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 12 | Edge | Open | Open | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 14 | Level | Open | Open | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 14 | Edge | Open | Open | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 15 | Level | Open | Open | Open | Open | Open | Open |
|-----+--------+-------+-------+-------+-------+------+------|
| 15 | Edge | Open | Open | Open | Open | Open | Open |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+