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# SEANIX TECHNOLOGY, INC.
S801
Processor 80486SX/80486DX/80486DX2/80486DX4/Pentium Overdrive
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set OPTI
Max. 64MB
Onboard
DRAM
Cache 64/128/256KB
BIOS AMI/ASI
Dimensions 330mm x 218mm
I/O 32-bit VESA local bus slots (2)
Options
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| Power LED & | J19 | Turbo LED | JP16 |
| keylock | | | |
|---------------+----------+----------------------+----------|
| Turbo switch | JP14 | Reset switch | S1 |
|---------------+----------+----------------------+----------|
| Speaker | JP15 | 32-bit VESA local | SL1 & |
| | | bus slots | SL2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | ASI password enabled | JP3 | Closed |
|---+----------------------------------+--------+------------|
| | ASI password disabled | JP3 | Open |
|---+----------------------------------+--------+------------|
| » | Flash BIOS write protect | JP4 | pins 2 & 3 |
| | disabled | | closed |
|---+----------------------------------+--------+------------|
| | Flash BIOS write protect enabled | JP4 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Flash voltage select 5v | JP27 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Flash voltage select 12v | JP27 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | ASI/MR BIOS | JP36 | Open |
|---+----------------------------------+--------+------------|
| | AMI w/MEGAKEY keyboard control & | JP36 | Closed |
| | CMOS memory clear | | |
|---+----------------------------------+--------+------------|
| » | Local ready delay enabled | JP37 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Local ready = CPU ready enabled | JP37 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | JP38 | Open |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP38 | Closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP41 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP42 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP43 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP45 | pins 1 & 2 |
| | alter | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 2MB | (1) 512K x 36 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 4MB | (1) 512K x 36 | (1) 512K x 36 | NONE |
|------------+---------------+---------------+---------------|
| 4MB | (1) 1M x 36 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 6MB | (1) 512K x 36 | (1) 512K x 36 | (1) 512K x 36 |
|------------+---------------+---------------+---------------|
| 6MB | (1) 512K x 36 | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 8MB | (1) 2M x 36 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 10MB | (1) 512K x 36 | (1) 2M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 |
|------------+---------------+---------------+---------------|
| 12MB | (1) 1M x 36 | (1) 2M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 12MB | (1) 512K x 36 | (1) 512K x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 14MB | (1) 512K x 36 | (1) 1M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 16MB | (1) 4M x 36 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 18MB | (1) 512K x 36 | (1) 2M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 20MB | (1) 1M x 36 | (1) 2M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (1) 2M x 36 | (1) 2M x 36 | (1) 2M x 36 |
|------------+---------------+---------------+---------------|
| 24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | (1) 2M x 36 | (1) 2M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 32MB | (1) 8M x 36 | NONE | NONE |
|------------+---------------+---------------+---------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 8M x 36 |
|------------+---------------+---------------+---------------|
| 48MB | (1) 2M x 36 | (1) 2M x 36 | (1) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 | NONE |
|------------+---------------+---------------+---------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 8M x 36 |
|------------+---------------+---------------+---------------|
| 64MB | (1) 16M x 36 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG (U1) | TAG (U2) |
|-------+-------------+------------+------------+------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 8K x 8 |
|-------+-------------+------------+------------+------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | (1) 8K x 8 |
|-------+-------------+------------+------------+------------|
| 256KB | (4) 32K x 8 | (4) 32K x | (1) 32K x | (1) 32K x |
| | | 8 | 8 | 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP11 | JP13 | JP25 | JP26 |
|-------+-----------------+----------------+--------+--------|
| 64KB | pins 2 & 3 | pins 2 & 3 | Open | Open |
| | closed | closed | | |
|-------+-----------------+----------------+--------+--------|
| 128KB | pins 1 & 2 | pins 1 & 2 | Open | Closed |
| | closed | closed | | |
|-------+-----------------+----------------+--------+--------|
| 256KB | pins 2 & 3 | pins 2 & 3 | Closed | Closed |
| | closed | closed | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JP20 |
|----------------------------+-------------------------------|
| 80486SX | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 80486DX | pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| 80486DX2 | pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| 80486DX4 | pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| Pentium Overdrive | pins 1 & 2, 3 & 4 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP5 | JP6 | JP7 |
|--------------+------------+------------+-------------------|
| 25MHz | Open | Open | pins 1 & 2 closed |
|--------------+------------+------------+-------------------|
| 33MHz | Closed | Open | pins 1 & 2 closed |
|--------------+------------+------------+-------------------|
| 40MHz | Open | Closed | pins 1 & 2 closed |
|--------------+------------+------------+-------------------|
| 50iMHz | Open | Open | pins 1 & 2 closed |
|--------------+------------+------------+-------------------|
| 50MHz | Closed | Closed | pins 1 & 2 closed |
|--------------+------------+------------+-------------------|
| 66iMHz | Closed | Open | pins 1 & 2 closed |
|--------------+------------+------------+-------------------|
| 75iMHz | Open | Open | pins 2 & 3 closed |
|--------------+------------+------------+-------------------|
| 100iMHz | Closed | Open | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU CLOCK SPEED CONFIGURATION (80486DX4) |
|------------------------------------------------------------|
| Speed | JP39 |
|----------------------------+-------------------------------|
| 1x | Open |
|----------------------------+-------------------------------|
| 2x | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 3x | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP9 | JP10 | JP34 | JP35 |
|-----------+------------+-----------+-----------+-----------|
| 3.3v | Open | Open | Open | Open |
|-----------+------------+-----------+-----------+-----------|
| 5.0v | Closed | Closed | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VESA WAIT STATE CONFIGURATION |
|------------------------------------------------------------|
| Wait states | JP23 |
|-------------------------------+----------------------------|
| 0 wait states | Open |
|-------------------------------+----------------------------|
| 1 wait state | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED CONFIGURATION |
|------------------------------------------------------------|
| CPU speed | JP24 |
|-------------------------------+----------------------------|
| <= 33MHz | Open |
|-------------------------------+----------------------------|
| > 33MHz | Closed |
+------------------------------------------------------------+