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# TYAN COMPUTER CORPORATION
S1894SLA (ZX)
Device Type Mainboard
Processor Pentium II/Celeron
Processor Speed 233/266/300/333/350/400/450MHz
Chip Set Intel 440ZX
Maximum Onboard 256MB (SDRAM supported)
Memory
Audio Chip Set Ensoniq
Cache 0/128/256/512KB (located on the CPU)
BIOS Award
Dimensions 305mm x 244mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
game/MIDI port, 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, line in, line out, microphone in, audio
in – CD-ROMs (2), wake on LAN connector
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+--------------+---------------|
| AGP slot | AGP | IDE | CN11 |
| | | interface 2 | |
|------------------+----------+--------------+---------------|
| ATX power | ATX | IDE | CN12 |
| connector | | interface 1 | |
|------------------+----------+--------------+---------------|
| Chassis fan | C1 | Floppy drive | CN13 |
| power | | interface | |
|------------------+----------+--------------+---------------|
| Chassis fan | C2 | Wake on LAN | CON3 |
| power | | connector | |
|------------------+----------+--------------+---------------|
| Chassis fan | C3 | Chassis | J7 |
| power | | intrusion | |
|------------------+----------+--------------+---------------|
| Game/MIDI port | CN1 | IDE | J10/pins 1 -3 |
| | | interface | |
| | | LED | |
|------------------+----------+--------------+---------------|
| Microphone in | CN2 | Power LED | J10/pins 2 & |
| | | | 4 |
|------------------+----------+--------------+---------------|
| Line in | CN3 | Reset switch | J10/pins 5 & |
| | | | 7 or 7 & 8 |
|------------------+----------+--------------+---------------|
| Line out | CN4 | Soft off | J10/pins 6 & |
| | | power supply | 8, 5 & 6 |
|------------------+----------+--------------+---------------|
| Serial port 2 | CN5 | Audio in – | J11 |
| | | CD-ROM | |
|------------------+----------+--------------+---------------|
| Serial port 1 | CN6 | Audio in – | J13 |
| | | CD-ROM | |
|------------------+----------+--------------+---------------|
| Parallel port | CN7 | Speaker | J16 |
|------------------+----------+--------------+---------------|
| USB connector 1 | CN8 | Green PC | JP16 |
| | | connector | |
|------------------+----------+--------------+---------------|
| USB connector 2 | CN9 | Power fan | JP23 |
| | | power | |
|------------------+----------+--------------+---------------|
| PS/2 mouse port | CN10 | 32-bit PCI | PC1 – PC3 |
| | | slots | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP2 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP2 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | On board sound enabled | JP17 | Open |
|---+---------------------------------+-------+--------------|
| | On board sound disabled | JP17 | Closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP22 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 2M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 1M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 24MB | (1) 2M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 64 | None |
|------------------+--------------------+--------------------|
| 32MB | (1) 2M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 40MB | (1) 4M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 48MB | (1) 4M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 64MB | (1) 8M x 64 | None |
|------------------+--------------------+--------------------|
| 64MB | (1) 4M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 72MB | (1) 8M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 80MB | (1) 8M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 96MB | (1) 8M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 128MB | (1) 16M x 64 | None |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 128MB | (1) 8M x 64 | (1) 8M x 64 |
|------------------+--------------------+--------------------|
| 136MB | (1) 16M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 144MB | (1) 16M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 160MB | (1) 16M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 192MB | (1) 16M x 64 | (1) 8M x 64 |
|------------------+--------------------+--------------------|
| 256MB | (1) 16M x 64 | (1) 16M 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|
|---------+-----------+----------+------+------+------+------|
| 333MHz | 66MHz | 5x | Open | Open |Closed|Closed|
|---------+-----------+----------+------+------+------+------|
| 350MHz | 100MHz | 3.5x |Closed| Open | Open |Closed|
|---------+-----------+----------+------+------+------+------|
| 400MHz | 100MHz | 4x | Open |Closed|Closed|Closed|
|---------+-----------+----------+------+------+------+------|
| 450MHz | 100MHz | 4.5x | Open |Closed| Open |Closed|
+------------------------------------------------------------+