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# TYAN COMPUTER CORPORATION
S1686S
Device Type Mainboard
Processor Pentium Pro/Pentium II
Processor Speed 150/166/180/200/233/266/300MHz
Chip Set Intel
Video Chip Set None
Maximum Onboard 1GB (EDO supported)
Memory
Maximum Video None
Memory
Cache 256/512KB (located on Pentium Pro/Pentium II
CPU)
BIOS AMI, Award
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 connectors (2), USB connectors (2),
ATX power connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+------------------+------------|
| ATX power | ATX | USB connector 2 | J22A |
| connector | | | |
|-----------------+----------+------------------+------------|
| Serial port 2 | CN1 | CPU 2 fan power | J23 |
|-----------------+----------+------------------+------------|
| Serial port 1 | CN2 | Soft off power | J29/pins 1 |
| | | supply | & 2 |
|-----------------+----------+------------------+------------|
| Parallel port | CN3 | Green PC | J29/pins 3 |
| | | connector | & 4 |
|-----------------+----------+------------------+------------|
| Floppy drive | CN5 | IR connector | J29/pins 8 |
| interface | | | - 10 |
|-----------------+----------+------------------+------------|
| IDE interface 1 | CN6 | IDE interface | J29/pins |
| | | LED | 15 & 16 |
|-----------------+----------+------------------+------------|
| IDE interface 2 | CN7 | Power LED | J29/pins |
| | | | 18 - 20 |
|-----------------+----------+------------------+------------|
| IR connector | IR2 | Reset switch | J29/pins |
| | | | 22 & 23 |
|-----------------+----------+------------------+------------|
| PS/2 mouse port | J18 | Speaker | J29/pins |
| | | | 24 - 27 |
|-----------------+----------+------------------+------------|
| Chassis fan | J19 | Wake on LAN | JP1 |
| power | | connector | |
|-----------------+----------+------------------+------------|
| USB connector 1 | J22 | 32-bit PCI slots | PC1 – PC5 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+---------+------------|
| » | CMOS memory normal operation | J44 | Open |
|---+---------------------------------+---------+------------|
| | CMOS memory clear | J44 | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 8MB | (2) 1M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 16MB | (2) 2M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 24MB | (2) 1M x 36 | (2) 1M x 36 | (2) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 4M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 1M x 36 | (2) 1M x 36 | (2) 1M x | (2) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 48MB | (2) 2M x 36 | (2) 2M x 36 | (2) 2M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 64MB | (2) 2M x 36 | (2) 2M x 36 | (2) 2M x | (2) 2M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (2) 8M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 | None | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|--------+------------+------------+------------+------------|
| 72MB | (2) 8M x | (2) 1M x | None | None |
| | 36 | 36 | | |
|--------+------------+------------+------------+------------|
| 80MB | (2) 8M x | (2) 2M x | None | None |
| | 36 | 36 | | |
|--------+------------+------------+------------+------------|
| 96MB | (2) 8M x | (2) 4M x | None | None |
| | 36 | 36 | | |
|--------+------------+------------+------------+------------|
| 96MB | (2) 4M x | (2) 4M x | (2) 4M x | None |
| | 36 | 36 | 36 | |
|--------+------------+------------+------------+------------|
| 128MB | (2) 16M x | None | None | None |
| | 36 | | | |
|--------+------------+------------+------------+------------|
| 128MB | (2) 8M x | (2) 8M x | None | None |
| | 36 | 36 | | |
|--------+------------+------------+------------+------------|
| 128MB | (2) 4M x | (2) 4M x | (2) 4M x | (2) 4M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 136MB | (2) 16M x | (2) 1M x | None | None |
| | 36 | 36 | | |
|--------+------------+------------+------------+------------|
| 144MB | (2) 16M x | (2) 2M x | None | None |
| | 36 | 36 | | |
|--------+------------+------------+------------+------------|
| 152MB | (2) 16M x | (2) 1M x | (2) 1M x | (2) 1M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 160MB | (2) 16M x | (2) 4M x | None | None |
| | 36 | 36 | | |
|--------+------------+------------+------------+------------|
| 176MB | (2) 16M x | (2) 2M x | (2) 2M x | (2) 2M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 192MB | (2) 16M x | (2) 8M x | None | None |
| | 36 | 36 | | |
|--------+------------+------------+------------+------------|
| 192MB | (2) 8M x | (2) 8M x | (2) 8M x | None |
| | 36 | 36 | 36 | |
|--------+------------+------------+------------+------------|
| 224MB | (2) 16M x | (2) 4M x | (2) 4M x | (2) 4M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 256MB | (2) 32M x | None | None | None |
| | 36 | | | |
|--------+------------+------------+------------+------------|
| 256MB | (2) 16M x | (2) 16M x | None | None |
| | 36 | 36 | | |
|--------+------------+------------+------------+------------|
| 256MB | (2) 8M x | (2) 8M x | (2) 8M x | (2) 8M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 272MB | (2) 16M x | (2) 16M x | (2) 1M x | (2) 1M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 280MB | (2) 32M x | (2) 1M x | (2) 1M x | (2) 1M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 288MB | (2) 16M x | (2) 16M x | (2) 2M x | (2) 2M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 304MB | (2) 32M x | (2) 2M x | (2) 2M x | (2) 2M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 320MB | (2) 16M x | (2) 16M x | (2) 4M x | (2) 4M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 320MB | (2) 16M x | (2) 8M x | (2) 8M x | (2) 8M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 352MB | (2) 32M x | (2) 4M x | (2) 4M x | (2) 4M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 384MB | (2) 16M x | (2) 16M x | (2) 16M x | None |
| | 36 | 36 | 36 | |
|--------+------------+------------+------------+------------|
| 448MB | (2) 32M x | (2) 8M x | (2) 8M x | (2) 8M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 512MB | (2) 32M x | (2) 32M x | None | None |
| | 36 | 36 | | |
|--------+------------+------------+------------+------------|
| 512MB | (2) 16M x | (2) 16M x | (2) 16M x | (2) 16M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 640MB | (2) 32M x | (2) 16M x | (2) 16M x | (2) 16M x |
| | 36 | 36 | 36 | 36 |
|--------+------------+------------+------------+------------|
| 768MB | (2) 32M x | (2) 32M x | (2) 32M x | None |
| | 36 | 36 | 36 | |
|--------+------------+------------+------------+------------|
| 1024MB | (2) 32M x | (2) 32M x | (2) 32M x | (2) 32M x |
| | 36 | 36 | 36 | 36 |
|------------------------------------------------------------|
| Note: Board accepts EDO memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | J13 | J14 | J15 | J16 |
|-------------+-----------+-----------+-----------+----------|
| | 3.3v | Closed | Closed | Open | Open |
|---+---------+-----------+-----------+-----------+----------|
| » | 5v | Open | Open | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM VOLTAGE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Voltage | J24 | J25 | J26 | J27 |
|-------------+-----------+-----------+-----------+----------|
| | 3.3v | Closed | Closed | Open | Open |
|---+---------+-----------+-----------+-----------+----------|
| » | 5v | Open | Open | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Note: 256KB/512KB cache is located on the Pentium |
| Pro/Pentium II CPU. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (PENTIUM PRO) |
|------------------------------------------------------------|
|CPU speed|Clock speed|Multiplier| J11 | J12 | J31 | J32 |
|---------+-----------+----------+------+------+------+------|
| 150MHz | 60MHz | 2.5x | Open |Closed| Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 166MHz | 66MHz | 2.5x |Closed| Open | Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 180MHz | 60MHz | 3x | Open |Closed|Closed| Open |
|---------+-----------+----------+------+------+------+------|
| 200MHz | 66MHz | 3x |Closed| Open |Closed| Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (PENTIUM PRO, CON’T) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | J33 | J34 | J37 |
| speed | speed | | | | |
|----------+----------+------------+--------+--------+-------|
| 150MHz | 60MHz | 2.5x | Closed | Closed | 3 & 4 |
|----------+----------+------------+--------+--------+-------|
| 166MHz | 66MHz | 2.5x | Closed | Closed | 1 & 2 |
|----------+----------+------------+--------+--------+-------|
| 180MHz | 60MHz | 3x | Closed | Closed | 3 & 4 |
|----------+----------+------------+--------+--------+-------|
| 200MHz | 66MHz | 3x | Closed | Closed | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (PENTIUM II) |
|------------------------------------------------------------|
|CPU speed|Clock speed|Multiplier| J11 | J12 | J31 | J32 |
|---------+-----------+----------+-------+-----+------+------|
| 200MHz | 66MHz | 3x |Closed |Open |Closed| Open |
|---------+-----------+----------+-------+-----+------+------|
| 233MHz | 66MHz | 3.5x |Closed |Open | Open | Open |
|---------+-----------+----------+-------+-----+------+------|
| 266MHz | 66MHz | 4x |Closed |Open |Closed|Closed|
|---------+-----------+----------+-------+-----+------+------|
| 300MHz | 66MHz | 4.5x |Closed |Open | Open |Closed|
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION (PENTIUM II, CON’T) |
|------------------------------------------------------------|
| CPU | Clock | Multiplier | J33 | J34 | J37 |
| speed | speed | | | | |
|----------+----------+------------+--------+--------+-------|
| 200MHz | 66MHz | 3x | Closed | Closed | 1 & 2 |
|----------+----------+------------+--------+--------+-------|
| 233MHz | 66MHz | 3.5x | Closed | Closed | 1 & 2 |
|----------+----------+------------+--------+--------+-------|
| 266MHz | 66MHz | 4x | Open | Closed | 1 & 2 |
|----------+----------+------------+--------+--------+-------|
| 300MHz | 66MHz | 4.5x | Open | Closed | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT SELECTION |
|------------------------------------------------------------|
| Setting | J30 | J36 |
|--------------------+-------------------+-------------------|
| Used as serial | Pins 1 & 2 closed | Pins 1 & 2 closed |
| port | | |
|--------------------+-------------------+-------------------|
| Used as IR | Pins 2 & 3 closed | Pins 2 & 3 closed |
| connector | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LM78 IRQ SELECTION |
|------------------------------------------------------------|
| IRQ | J49 | J50 |
|------------------+--------------------+--------------------|
| 5 | Open | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 7 | Open | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 9 | Pins 1 & 2 closed | Open |
|------------------+--------------------+--------------------|
| 11 | Pins 2 & 3 closed | Open |
+------------------------------------------------------------+