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# CHAINTECH COMPUTER COMPANY, LTD
486SPM
Processor 80486SX/CX486DX/AM486DX/U5S/80486DX/ODP486SX/CX486DX2/
CX486DX2V/AM486DX2/AM486DX2/80486DX2/CX486DX4/AM486DX4-NV8T/
AM486DX4-SV8B/80486DX4/80486DX4(WB)/Pentium Overdrive/
SL Pentium Overdrive/CXM1SC
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/100(internal)/
Speed 120(internal)MHz
Chip Set Unidentified
Max. 128MB
Onboard
DRAM
Cache 128/256/512/1024KB
BIOS Award
Dimensions 220mm x 250mm
I/O Green PC connector, floppy drive interface, IDE interfaces (2), parallel port,
Options serial ports (2), 32-bit PCI slots (3)
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN2 | Green PC LED | JP27 |
|-------------------+----------+------------------+----------|
| Serial port 2 | CN3 | Green PC | JP29 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Parallel port | CN4 | Turbo switch | JP35 |
|-------------------+----------+------------------+----------|
| Floppy drive | CN5 | Turbo LED | JP36 |
| interface | | | |
|-------------------+----------+------------------+----------|
| IDE interface 1 | CN6 | Speaker | JP37 |
|-------------------+----------+------------------+----------|
| IDE interface 2 | CN7 | Reset switch | JP44 |
|-------------------+----------+------------------+----------|
| External battery | JP12 | Power LED & | JP45 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| IDE interface LED | JP14 | 32-bit PCI slots | PCI1 - |
| 1 | | | PCI3 |
|-------------------+----------+------------------+----------|
| IDE interface LED | JP15 | | |
| 2 | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | JP13 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP13 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | PCI-Bus clock select normal | JP21 | pins 1 & 2 |
| | speed | | closed |
|---+----------------------------------+--------+------------|
| | PCI-Bus clock select ½ speed | JP21 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP31 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Turbo switch select high speed | JP35 | Closed |
|---+----------------------------------+--------+------------|
| | Turbo switch select low speed | JP35 | Open |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP39 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP40 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP46 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP47 | N/A |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+---------------+-------------+------------+----------|
| 1MB | (1) 256K x 36 | NONE | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 2MB | (1) 256K x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+---------------+-------------+------------+----------|
| 2MB | (1) 512K x 36 | NONE | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 256K x 36 | (1) 256K x | (1) 512K x | NONE |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 512K x 36 | (1) 512K x | NONE | NONE |
| | | 36 | | |
|------+---------------+-------------+------------+----------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 5MB | (1) 256K x 36 | (1) 1M x 36 | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 6MB | (1) 256K x 36 | (1) 256K x | (1) 1M x | NONE |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 6MB | (1) 512K x 36 | (1) 1M x 36 | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 256K x 36 | (1) 256K x | (1) 512K x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 512K x 36 | (1) 512K x | (1) 1M x | NONE |
| | | 36 | 36 | |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 8MB | (1) 2M x 36 | NONE | NONE | NONE |
|------+---------------+-------------+------------+----------|
| 10MB | (1) 256K x 36 | (1) 256K x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 12MB | (1) 512K x 36 | (1) 512K x | (1) 1M x | (1) 1M x |
| | | 36 | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+---------------+-------------+------------+----------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+---------------+-------------+------------+----------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 | NONE | NONE |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 17MB | (1) 256K x | (1) 4M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 18MB | (1) 256K x | (1) 256K x | (1) 4M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 18MB | (1) 512K x | (1) 4M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 20MB | (1) 512K x | (1) 512K x | (1) 4M x | NONE |
| | 36 | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 512K x | (1) 512K x | (1) 1M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 1M x 36 | (1) 1M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 24MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 2M x 36 | (1) 2M x | (1) 2M x | (1) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 32MB | (1) 8M x 36 | NONE | NONE | NONE |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 512K x | (1) 512K x | (1) 4M x | (1) 4M x |
| | 36 | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 40MB | (1) 1M x 36 | (1) 1M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 4M x | (1) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 16M x | NONE | NONE | NONE |
| | 36 | | | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (1) 8M x 36 | (1) 8M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 65MB | (1) 256K x | (1) 16M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 16M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 68MB | (1) 1M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 16M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 72MB | (1) 1M x 36 | (1) 1M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 16M x | NONE | NONE |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 80MB | (1) 4M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 16M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 4M x 36 | (1) 4M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | NONE |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 16M x | (1) 16M x | NONE | NONE |
| | 36 | 36 | | |
|-------+-------------+------------+------------+------------|
| 128MB | (1) 8M x 36 | (1) 8M x | (1) 8M x | (1) 8M x |
| | | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 64K x 8 | NONE | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 128K x 8 | NONE | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 1MB | (4) 128K x 8 | (4) 128K x 8 | (1) 64K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP17 | JP18 | JP19 | JP20 | JP25 | JP26 |
|--------+--------+--------+--------+--------+-------+-------|
| 128KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 |
|--------+--------+--------+--------+--------+-------+-------|
| 256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 |
|--------+--------+--------+--------+--------+-------+-------|
| 256KB | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|--------+--------+--------+--------+--------+-------+-------|
| 512KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|--------+--------+--------+--------+--------+-------+-------|
| 512KB | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 2 & 3 | 2 & 3 |
|--------+--------+--------+--------+--------+-------+-------|
| 1MB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J2 | J3 | J4 | J5 | J6 |
|---------------+--------+--------+--------+--------+--------|
| 80486SX | Closed | Open | Open | Open | Closed |
|---------------+--------+--------+--------+--------+--------|
| CX486DX | Open | Closed | Open | Closed | Open |
|---------------+--------+--------+--------+--------+--------|
| AM486DX | Open | Closed | Open | Open | Closed |
|---------------+--------+--------+--------+--------+--------|
| U5S | Closed | Open | Open | Open | Closed |
|---------------+--------+--------+--------+--------+--------|
| 80486DX | Open | Closed | Open | Open | Closed |
|---------------+--------+--------+--------+--------+--------|
| ODP486SX | Open | Closed | Open | Open | Closed |
|---------------+--------+--------+--------+--------+--------|
| CX486DX2V | Open | Closed | Open | Closed | Open |
|---------------+--------+--------+--------+--------+--------|
| CX486DX2 | Open | Closed | Open | Closed | Open |
|---------------+--------+--------+--------+--------+--------|
| AM486DX2 | Open | Closed | Open | Open | Closed |
|---------------+--------+--------+--------+--------+--------|
| AM486DX2-80 | Open | Closed | Open | Open | Closed |
|---------------+--------+--------+--------+--------+--------|
| 80486DX2 | Open | Closed | Open | Open | Closed |
|---------------+--------+--------+--------+--------+--------|
| CX486DX4 | Open | Closed | Open | Closed | Open |
|---------------+--------+--------+--------+--------+--------|
| AM486DX4-NV8T | Open | Closed | Open | Open | Closed |
|---------------+--------+--------+--------+--------+--------|
| AM486DX4-SV8B | Open | Open | Closed | Open | Open |
|---------------+--------+--------+--------+--------+--------|
| 80486DX4 | Open | Closed | Open | Open | Closed |
|---------------+--------+--------+--------+--------+--------|
| 80486DX4 (WB) | Open | Open | Closed | Open | Open |
|---------------+--------+--------+--------+--------+--------|
| Pentium | Open | Open | Closed | Open | Open |
| Overdrive | | | | | |
|---------------+--------+--------+--------+--------+--------|
| SL Pentium | Open | Open | Closed | Open | Open |
| Overdrive | | | | | |
|---------------+--------+--------+--------+--------+--------|
| CXM1SC | Open | Open | Closed | Open | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Type | J7 | JP41 | JP42 | JP43 |
|-----------------------+----------+--------+--------+-------|
| 80486SX | Open | Open | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| CX486DX | Open | 1 & 2 | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| AM486DX | Open | Open | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| U5S | Open | Open | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| 80486DX | Open | Open | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| ODP486SX | Open | Open | 1 & 2 | 2 & 3 |
|-----------------------+----------+--------+--------+-------|
| CX486DX2V | Open | 1 &2 | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| CX486DX2 | Open | Open | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| AM486DX2 | Open | Open | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| AM486DX2-80 | Open | Open | 2 & 3 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| 80486DX2 | Open | Open | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| CX486DX4 | Open | 1 & 2 | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| AM486DX4-NV8T | Open | Open | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| AM486DX4-SV8B | Closed | Open | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| 80486DX4 | Open | Open | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| 80486DX4 (WB) | Closed | Open | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| Pentium Overdrive | Closed | Open | 1 & 2 | 1 & 2 |
|-----------------------+----------+--------+--------+-------|
| SL Pentium Overdrive | Closed | Open | 1 & 2 | 2 & 3 |
|-----------------------+----------+--------+--------+-------|
| CXM1SC | Closed | Open | 1 & 2 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP22 | JP23 |
|------------------+--------------------+--------------------|
| 25MHz | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 33MHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 40MHz | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 50iMHz | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 50MHz | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 66iMHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 75iMHz | pins 2 & 3 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 80iMHz | pins 1 & 2 closed | pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 100iMHz | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 120iMHz | pins 1 & 2 closed | pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP32 | JP38 |
|--------------------+------------------+--------------------|
| 3.3v | Open | pins 1 & 2 closed |
|--------------------+------------------+--------------------|
| 4v | Open | pins 2 & 3 closed |
|--------------------+------------------+--------------------|
| 5v | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CONFIGURATION |
|------------------------------------------------------------|
| DMA | JP1 | JP2 |
|------------------+--------------------+--------------------|
| DMA 1 | pins 1 & 2 closed | pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| DMA 3 | pins 2 & 3 closed | pins 2 & 3 closed |
+------------------------------------------------------------+