TEXT View Source
# SOYO COMPUTER CO., LTD.
SY-25M/N/P
Processor CX486S/80486SX/80486DX/AM486DX/80486DX2/CX486DX/ 80486DX4/P24D/P24T
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set Unidentified
Video Chip None
Set
Maximum 128MB (EDO supported)
Onboard
Memory
Maximum None
Video
Memory
Cache 64/128/256KB
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 | Green PC | JP4 |
| keylock | | connector | |
|------------------+----------+-------------------+----------|
| Speaker | J18 | Green PC | JP6 |
| | | connector | |
|------------------+----------+-------------------+----------|
| Reset switch | J19 | Green PC | JP7 |
| | | connector | |
|------------------+----------+-------------------+----------|
| External battery | J20 | Green PC | JP8 |
| | | connector | |
|------------------+----------+-------------------+----------|
| Turbo switch | J21 | 32-bit VESA local | SL1 – |
| | | bus slots | SL3 |
|------------------+----------+-------------------+----------|
| Turbo LED | J22 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Monitor type select monochrome | JP3 | Open |
|---+---------------------------------+-------+--------------|
| | Monitor type select | JP3 | Closed |
| | color/EGA/VGA | | |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP5 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP5 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP17 | Pins 2 & 3 |
| | alter | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP27 | Pins 1 & 2 |
| | alter | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP34 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+---------------+-------------+------------+----------|
| 1MB | (1) 256K x 36 | None | None | None |
|------+---------------+-------------+------------+----------|
| 2MB | (1) 256K x 36 | (1) 256K x | None | None |
| | | 36 | | |
|------+---------------+-------------+------------+----------|
| 2MB | (1) 512K 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 | | |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 1M x 36 | None | None | None |
|------+---------------+-------------+------------+----------|
| 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) 256K x 36 | (1) 256K x | (1) 1M x | None |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 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 | |
|------+---------------+-------------+------------+----------|
| 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) 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 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 | |
|-------+-------------+------------+------------+------------|
| 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 |
|-------+-------------+------------+------------+------------|
| 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) 4M x 36 | (1) 4M x | (1) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 16M x | None | None | None |
| | 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 | |
|-------+-------------+------------+------------+------------|
| 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 | |
|-------+-------------+------------+------------+------------|
| 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 | (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 |
|------------+--------------+--------------+-----------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
|------------+--------------+--------------+-----------------|
| 128KB | (4) 32K x 8 | None | (1) 8K x 8 |
|------------+--------------+--------------+-----------------|
| 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 | JP13 |
|-----------+----------------+---------------+---------------|
| 64KB | Pins 2 & 3 | Open | Pins 1 & 2 |
| | closed | | closed |
|-----------+----------------+---------------+---------------|
| 128KB | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (A) | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (B) | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP29 | JP30 | JP31 |
|---------------+--------------+--------------+--------------|
| 25MHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 33MHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 40MHz | Closed | Open | Open |
|---------------+--------------+--------------+--------------|
| 50iMHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 50MHz | Open | Closed | Open |
|---------------+--------------+--------------+--------------|
| 66iMHz | Open | Closed | Closed |
|---------------+--------------+--------------+--------------|
| 75iMHz | Closed | Open | Closed |
|---------------+--------------+--------------+--------------|
| 100iMHz | Open | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP1 | JP2 | JP11 | JP12 | JP14 |
|----------+-------+-------+------------+-------+------------|
| CX 486S | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
|----------+-------+-------+------------+-------+------------|
| 80486SX | 2 & 3 | 1 & 2 | 3 & 4 | 2 & 3 | 2 & 3 |
|----------+-------+-------+------------+-------+------------|
| CX 486DX | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 |
|----------+-------+-------+------------+-------+------------|
| 80486DX | 2 & 3 | 1 & 2 | 3 & 4 | 2 & 3 | 1 & 2 |
|----------+-------+-------+------------+-------+------------|
| AM486DX | 2 & 3 | 1 & 2 | 3 & 4 | 2 & 3 | 1 & 2 |
|----------+-------+-------+------------+-------+------------|
| 80486DX2 | 2 & 3 | 1 & 2 | 3 & 4 | 2 & 3 | 1 & 2 |
|----------+-------+-------+------------+-------+------------|
| 80486DX4 | 2 & 3 | 1 & 2 | 3 & 4 | 2 & 3 | 1 & 2 |
|----------+-------+-------+------------+-------+------------|
| P24D | 2 & 3 | 1 & 2 | 1 & 2, 3 & | 2 & 3 | 1 & 2, 3 & |
| | | | 4 | | 4 |
|----------+-------+-------+------------+-------+------------|
| P24T | 2 & 3 | 1 & 2 | 3 & 4 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP15 | JP16 | JP18 | JP19 | JP20 |
|------------+---------+----------+---------+--------+-------|
| CX 486S | Open | Open | 2 & 3 | 2 & 3 | Open |
|------------+---------+----------+---------+--------+-------|
| 80486SX | Open | Open | 2 & 3 | 4 & 5 | Open |
|------------+---------+----------+---------+--------+-------|
| CX 486DX | 3 & 4 | Open | 2 & 3 | 2 & 3 | Open |
|------------+---------+----------+---------+--------+-------|
| 80486DX | 3 & 4 | Open | 2 & 3 | 4 & 5 | Open |
|------------+---------+----------+---------+--------+-------|
| AM486DX | 3 & 4 | Open | 2 & 3 | 4 & 5 | Open |
|------------+---------+----------+---------+--------+-------|
| 80486DX2 | 3 & 4 | Open | 2 & 3 | 4 & 5 | Open |
|------------+---------+----------+---------+--------+-------|
| 80486DX4 | 3 & 4 | Open | 2 & 3 | 4 & 5 | Open |
|------------+---------+----------+---------+--------+-------|
| P24D | 3 & 4 | Closed | 1 & 2 | 4 & 5 | Open |
|------------+---------+----------+---------+--------+-------|
| P24T | 2 & 3 | Open | 1 & 2 | 1 & 2 | Open |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP21 | JP22 | JP23 | JP32 |
|-------------+-----------+-----------+-----------+----------|
| CX 486S | Open | 2 & 3 | 2 & 3 | 1 & 2 |
|-------------+-----------+-----------+-----------+----------|
| 80486SX | 1 & 2 | Open | Open | 1 & 2 |
|-------------+-----------+-----------+-----------+----------|
| CX 486DX | Open | 2 & 3 | 2 & 3 | 1 & 2 |
|-------------+-----------+-----------+-----------+----------|
| 80486DX | 1 & 2 | Open | Open | 1 & 2 |
|-------------+-----------+-----------+-----------+----------|
| AM486DX | 1 & 2 | Open | Open | 1 & 2 |
|-------------+-----------+-----------+-----------+----------|
| 80486DX2 | 1 & 2 | Open | Open | 1 & 2 |
|-------------+-----------+-----------+-----------+----------|
| 80486DX4 | 1 & 2 | Open | Open | 1 & 2 |
|-------------+-----------+-----------+-----------+----------|
| P24D | 2 & 3 | 1 & 2 | Open | 1 & 2 |
|-------------+-----------+-----------+-----------+----------|
| P24T | Open | 1 & 2 | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | JP24 |
|----------------------------+-------------------------------|
| 3.3v | Pins 3 & 5, 4 & 6 closed |
|----------------------------+-------------------------------|
| 5v | Pins 1 & 3, 2 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS WAIT STATE SELECTION |
|------------------------------------------------------------|
| Setting | JP25 |
|----------------------------+-------------------------------|
| | 0 | Pins 1 & 2 closed |
|----+-----------------------+-------------------------------|
| » | 1 | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VL BUS SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP26 |
|----------------------------+-------------------------------|
| | <= 33MHz | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| » | >33 MHz | Pins 2 & 3 closed |
+------------------------------------------------------------+