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# TYAN COMPUTER CORPORATION
S1846S
Device Type Mainboard
Processor Pentium II/Celeron
Processor Speed 233/266/300/333/350/400MHz
Chip Set Intel 440BX
Maximum Onboard 768MB (SDRAM supported)
Memory
Cache 0/128/256/512KB (located on CPU)
BIOS AMI
Dimensions 305mm x 244mm
I/O Options 32-bit PCI slots (5), floppy drive interface,
green PC 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 | Floppy drive | CN9 |
| | | interface | |
|-----------------+----------+-------------------+-----------|
| ATX power | ATX | Wake on LAN | CON3 |
| connector | | connector | |
|-----------------+----------+-------------------+-----------|
| Chassis fan | C1 | Chassis intrusion | J7 |
| power | | connector | |
|-----------------+----------+-------------------+-----------|
| Chassis fan | C2 | Soft off power | J8/pins 1 |
| power | | supply | & 2 |
|-----------------+----------+-------------------+-----------|
| Chassis fan | C3 | Green PC | J8/pins 3 |
| power | | connector | & 4 |
|-----------------+----------+-------------------+-----------|
| Serial port 2 | CN1 | IR connector | J8/pins 6 |
| | | | - 10 |
|-----------------+----------+-------------------+-----------|
| Serial port 1 | CN2 | IDE interface LED | J8/pins |
| | | | 13 - 16 |
|-----------------+----------+-------------------+-----------|
| Parallel port | CN3 | Power LED | J8/pins |
| | | | 18 & 20 |
|-----------------+----------+-------------------+-----------|
| USB connector 1 | CN4 | Reset switch | J8/pins |
| | | | 22 & 23 |
|-----------------+----------+-------------------+-----------|
| USB connector 2 | CN5 | Speaker | J8/pins |
| | | | 24 - 27 |
|-----------------+----------+-------------------+-----------|
| PS/2 mouse port | CN6 | Green PC | JP16 |
| | | connector | |
|-----------------+----------+-------------------+-----------|
| IDE interface 2 | CN7 | 32-bit PCI slots | PC1 - PC5 |
|-----------------+----------+-------------------+-----------|
| IDE interface 1 | CN8 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Factory configured - do not | CON2 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP2 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP2 | Pins 2 & 3 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|------------+---------------+---------------+---------------|
| 8MB | (1) 1M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 16MB | (1) 1M x 64 | (1) 1M x 64 | None |
|------------+---------------+---------------+---------------|
| 16MB | (1) 2M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 24MB | (1) 1M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|------------+---------------+---------------+---------------|
| 32MB | (1) 2M x 64 | (1) 2M x 64 | None |
|------------+---------------+---------------+---------------|
| 32MB | (1) 4M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 48MB | (1) 2M x 64 | (1) 2M x 64 | (1) 2M x 64 |
|------------+---------------+---------------+---------------|
| 64MB | (1) 4M x 64 | (1) 4M x 64 | None |
|------------+---------------+---------------+---------------|
| 64MB | (1) 8M x 64 | None | None |
|------------+---------------+---------------+---------------|
| 96MB | (1) 4M x 64 | (1) 4M x 64 | (1) 4M x 64 |
|------------+---------------+---------------+---------------|
| 128MB | (1) 8M x 64 | (1) 8M x 64 | None |
|------------+---------------+---------------+---------------|
| 128MB | (1) 16M x 64 | None | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION (CON'T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 |
|-----------+--------------+--------------+------------------|
| 164MB | (1) 16M x 64 | (1) 1M x 64 | None |
|-----------+--------------+--------------+------------------|
| 144MB | (1) 16M x 64 | (1) 1M x 64 | (1) 1M x 64 |
|-----------+--------------+--------------+------------------|
| 144MB | (1) 16M x 64 | (1) 2M x 64 | None |
|-----------+--------------+--------------+------------------|
| 160MB | (1) 16M x 64 | (1) 2M x 64 | (1) 2M x 64 |
|-----------+--------------+--------------+------------------|
| 160MB | (1) 16M x 64 | (1) 4M x 64 | None |
|-----------+--------------+--------------+------------------|
| 192MB | (1) 16M x 64 | (1) 4M x 64 | (1) 4M x 64 |
|-----------+--------------+--------------+------------------|
| 192MB | (1) 16M x 64 | (1) 8M x 64 | None |
|-----------+--------------+--------------+------------------|
| 192MB | (1) 8M x 64 | (1) 8M x 64 | (1) 8M x 64 |
|-----------+--------------+--------------+------------------|
| 256MB | (1) 16M x 64 | (1) 8M x 64 | (1) 8M x 64 |
|-----------+--------------+--------------+------------------|
| 256MB | (1) 16M x 64 | (1) 16M x 64 | None |
|-----------+--------------+--------------+------------------|
| 256MB | (1) 32M x 64 | None | None |
|-----------+--------------+--------------+------------------|
| 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 SDRAM memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: 256KB/512KB cache is located on the Pentium II CPU. |
| 128KB cache is located on the Celeron 300A & 333 CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
|CPU speed|Clock speed|Multiplier| JP10 | JP11 | JP12 | JP13 |
|---------+-----------+----------+------+------+------+------|
| 233MHz | 66MHz | 3.5x |Closed| Open | Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 266MHz | 66MHz | 4x | Open |Closed|Closed|Closed|
|---------+-----------+----------+------+------+------+------|
| 300MHz | 66MHz | 4.5x | Open |Closed| Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 300MHz | 100MHz | 3x |Closed| Open |Closed|Closed|
|---------+-----------+----------+------+------+------+------|
| 333MHz | 66MHz | 5x | Open | Open |Closed|Closed|
|---------+-----------+----------+------+------+------+------|
| 350MHz | 100MHz | 3.5x |Closed| Open | Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 400MHz | 100MHz | 4x | Open |Closed|Closed|Closed|
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOPPY DRIVE/IR SELECTION |
|------------------------------------------------------------|
| Setting | JP4 | JP7 | JP8 |
|-----------------+--------+----------------+----------------|
| 2 floppy drives | Closed | Pins 2 & 3 | Pins 1 & 2 |
| | | closed | closed |
|-----------------+--------+----------------+----------------|
| 1 floppy, 1 IR | Open | Pins 1 & 2 | Pins 2 & 3 |
| | | closed | closed |
+------------------------------------------------------------+