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# TYAN COMPUTER CORPORATION
S1856S
Device Mainboard
Type
Processor Celeron
Processor 233/266/300/333/350/366/400/433/450/466/500/550/600MHz
Speed
Chip Set Intel 440BX
Maximum 768MB (EDO supported)
Onboard
Memory
Cache 0/128KB (located on the CPU)
BIOS AMI
Dimensions 305mm x 244mm
I/O 32-bit PCI slots (5), floppy drive interface, green PC
Options connector, IDE interfaces (2), parallel port, PS/2
mouse port, serial ports (2), IR connector, USB
connectors (2), ATX power connector, AGP slot
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| AGP slot | AGP | PS/2 mouse port | CN6 |
|-------------------+----------+------------------+----------|
| ATX power | ATX | IDE interface 2 | CN7 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Green PC | C1 | IDE interface 1 | CN8 |
| connector | | | |
|-------------------+----------+------------------+----------|
| Chassis fan power | C2 | Floppy drive | CN9 |
| | | interface | |
|-------------------+----------+------------------+----------|
| Chassis fan power | C3 | Wake on modem | CON2 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN1 | Wake on LAN | CON3 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN2 | Chassis | J7 |
| | | intrusion | |
| | | connector | |
|-------------------+----------+------------------+----------|
| Parallel port | CN3 | Front panel | J47 |
| | | connector | |
|-------------------+----------+------------------+----------|
| USB connector 1 | CN4 | Speaker | J48 |
|-------------------+----------+------------------+----------|
| USB connector 2 | CN5 | 32-bit PCI slots | PC1 - |
| | | | PC5 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP2 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP2 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP17 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 8MB | (1) 1M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 16MB | (1) 2M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 16MB | (1) 1M x 64 | (1) 1M x 64 | None |
|------------+---------------+---------------+---------------|
| 24MB | (1) 2M x 64 | (1) 1M x 64 | None |
|------------+---------------+---------------+---------------|
| 24MB | (1) 1M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 32MB | (1) 4M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 32MB | (1) 2M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 32MB | (1) 2M x 64 | (1) 2M x 64 | None |
|------------+---------------+---------------+---------------|
| 40MB | (1) 4M x 64 | (1) 1M x 64 | None |
|------------+---------------+---------------+---------------|
| 40MB | (1) 2M x 64 | (1) 2M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 48MB | (1) 4M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 48MB | (1) 4M x 64 | (1) 2M x 64 | None |
|------------+---------------+---------------+---------------|
| 48MB | (1) 2M x 64 | (1) 2M x 64 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 56MB | (1) 4M x 64 | (1) 2M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 64MB | (1) 8M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 64MB | (1) 4M x 64 | (1) 2M x 64 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 64MB | (1) 4M x 64 | (1) 4M x 64 | None |
|------------+---------------+---------------+---------------|
| 72MB | (1) 8M x 64 | (1) 1M x 64 | None |
|------------+---------------+---------------+---------------|
| 72MB | (1) 4M x 64 | (1) 4M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 80MB | (1) 8M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 80MB | (1) 8M x 64 | (1) 2M x 64 | None |
|------------+---------------+---------------+---------------|
| 80MB | (1) 4M x 64 | (1) 4M x 64 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 88MB | (1) 8M x 64 | (1) 2M x 64 | (1) 1M x 64 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION (CON'T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 96MB | (1) 8M x 64 | (1) 2M x 64 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 96MB | (1) 8M x 64 | (1) 4M x 64 | None |
|------------+---------------+---------------+---------------|
| 96MB | (1) 4M x 64 | (1) 4M x 64 | (1) 4M x 64 |
|------------+---------------+---------------+---------------|
| 104MB | (1) 8M x 64 | (1) 4M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 112MB | (1) 8M x 64 | (1) 4M x 64 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 128MB | (1) 16M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 128MB | (1) 8M x 64 | (1) 4M x 64 | (1) 4M x 64 |
|------------+---------------+---------------+---------------|
| 128MB | (1) 8M x 64 | (1) 8M x 64 | None |
|------------+---------------+---------------+---------------|
| 136MB | (1) 16M x 64 | (1) 1M x 64 | None |
|------------+---------------+---------------+---------------|
| 136MB | (1) 8M x 64 | (1) 8M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 144MB | (1) 16M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 144MB | (1) 16M x 64 | (1) 2M x 64 | None |
|------------+---------------+---------------+---------------|
| 144MB | (1) 8M x 64 | (1) 8M x 64 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 160MB | (1) 16M x 64 | (1) 4M x 64 | None |
|------------+---------------+---------------+---------------|
| 192MB | (1) 16M x 64 | (1) 8M x 64 | None |
|------------+---------------+---------------+---------------|
| 192MB | (1) 8M x 64 | (1) 8M x 64 | (1) 8M x 64 |
|------------+---------------+---------------+---------------|
| 200MB | (1) 16M x 64 | (1) 8M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 208MB | (1) 16M x 64 | (1) 8M x 64 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 224MB | (1) 16M x 64 | (1) 8M x 64 | (1) 4M x 64 |
|------------+---------------+---------------+---------------|
| 256MB | (1) 32M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 256MB | (1) 16M x 64 | (1) 8M x 64 | (1) 8M x 64 |
|------------+---------------+---------------+---------------|
| 264MB | (1) 32M x 64 | (1) 1M x 64 | None |
|------------+---------------+---------------+---------------|
| 272MB | (1) 32M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 272MB | (1) 32M x 64 | (1) 2M x 64 | None |
|------------+---------------+---------------+---------------|
| 288MB | (1) 32M x 64 | (1) 2M x 64 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 288MB | (1) 32M x 64 | (1) 4M x 64 | None |
|------------+---------------+---------------+---------------|
| 320MB | (1) 32M x 64 | (1) 4M x 64 | (1) 4M x 64 |
|------------+---------------+---------------+---------------|
| 320MB | (1) 32M x 64 | (1) 8M x 64 | None |
|------------+---------------+---------------+---------------|
| 384MB | (1) 32M x 64 | (1) 8M x 64 | (1) 8M x 64 |
|------------+---------------+---------------+---------------|
| 384MB | (1) 32M x 64 | (1) 16M x 64 | None |
|------------+---------------+---------------+---------------|
| 384MB | (1) 16M x 64 | (1) 16M x 64 | (1) 16M x 64 |
|------------+---------------+---------------+---------------|
| 512MB | (1) 32M x 64 | (1) 16M x 64 | (1) 16M x 64 |
|------------+---------------+---------------+---------------|
| 512MB | (1) 32M x 64 | (1) 32M x 64 | None |
|------------+---------------+---------------+---------------|
| 768MB | (1) 32M x 64 | (1) 32M x 64 | (1) 32M x 64 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: 128KB cache is located on the Celeron 300A & |
| 333 CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
|CPU speed|Clock speed|Multiplier| JP10 | JP11 | JP12 | JP13 |
|---------+-----------+----------+------+------+------+------|
| 300MHz | 66MHz | 4.5x | Open |Closed| Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 333MHz | 66MHz | 5x | Open | Open |Closed|Closed|
|---------+-----------+----------+------+------+------+------|
| 350MHz | 100MHz | 3.5x |Closed| Open | Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 366MHz | 66MHz | 5.5x | Open | Open | Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 400MHz | 100MHz | 4x | Open |Closed|Closed|Closed|
|---------+-----------+----------+------+------+------+------|
| 400MHz | 66MHz | 6x | Open |Closed|Closed| Open |
|---------+-----------+----------+------+------+------+------|
| 433MHz | 66MHz | 6.5x |Closed|Closed| Open | Open |
|---------+-----------+----------+------+------+------+------|
| 450MHz | 100MHz | 4.5x | Open |Closed| Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 466MHz | 66MHz | 7x |Closed| Open |Closed| Open |
|---------+-----------+----------+------+------+------+------|
| 500MHz | 100MHz | 5x | Open | Open |Closed|Closed|
|---------+-----------+----------+------+------+------+------|
| 550MHz | 100MHz | 5.5x | Open | Open | Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 600MHz | 100MHz | 6x |Closed|Closed|Closed| Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BUS SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP1 |
|----------------------------+-------------------------------|
| Auto detect | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 66MHz | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 100MHz | Open |
+------------------------------------------------------------+