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# SKYWELL TECHNOLOGY CORPORATION, LTD.
PT2000AIO
Processor CX486DX/AM486DX(PLUS)/TI486DX/CX486DX2/TI486DX2/AM486DX2/
80486DX2/AM486DX4/CX486DX4/TI486DX4/80486DX4/SL80486DX4/P24D/P24T/CX5X86/CXM9/AM5X86
Processor 25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set Unidentified
Video Chip Unidentified
Set
Maximum 64MB
Onboard
Memory
Maximum 2MB
Video
Memory
Cache 128/256/512/1024KB
BIOS Award
Dimensions 254mm x 218mm
I/O Floppy drive interface, IDE interface, green PC connector, parallel port, serial
Options ports (2), VGA feature connector, VGA port, riser slot, IR connector
NPU None
Options
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| IDE interface | CN4 | Auxiliary keyboard | J10 |
| | | connector | |
|----------------+----------+---------------------+----------|
| Floppy drive | CN5 | VGA port | J30 |
| interface | | | |
|----------------+----------+---------------------+----------|
| Parallel port | CN6 | VGA feature | J31 |
| | | connector | |
|----------------+----------+---------------------+----------|
| Serial port 1 | CN7 | IDE interface LED | JP21 |
|----------------+----------+---------------------+----------|
| Serial port 2 | CN8 | IR connector | JP25 |
|----------------+----------+---------------------+----------|
| Reset switch | J8 | Riser slot | SL1 |
|----------------+----------+---------------------+----------|
| Power LED & | J9 | | |
| keylock | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | VGA address select normal | JP12 | Pins 1 & 2 |
| | operation | | closed |
|---+---------------------------------+-------+--------------|
| | VGA address select use A27 - | JP12 | Pins 2 & 3 |
| | A31 | | closed |
|---+---------------------------------+-------+--------------|
| » | CMOS memory normal operation | JP23 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | CMOS memory clear | JP23 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP29 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | JP30 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (1) 256K x 36 | None |
|------------------+--------------------+--------------------|
| 2MB | (1) 512K x 36 | None |
|------------------+--------------------+--------------------|
| 2MB | (1) 256K x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 3MB | (1) 256K x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 3MB | (1) 512K x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 4MB | (1) 1M x 36 | None |
|------------------+--------------------+--------------------|
| 4MB | (1) 512K x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 5MB | (1) 256K x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 5MB | (1) 1M x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 6MB | (1) 512K x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 6MB | (1) 1M x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 8MB | (1) 2M x 36 | None |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 9MB | (1) 2M x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 10MB | (1) 2M x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 12MB | (1) 2M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (1) 4M x 36 | None |
|------------------+--------------------+--------------------|
| 17MB | (1) 256K x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 17MB | (1) 4M x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 18MB | (1) 512K x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 18MB | (1) 4M x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 24MB | (1) 2M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (1) 8M x 36 | None |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 33MB | (1) 256K x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 33MB | (1) 8M x 36 | (1) 256K x 36 |
|------------------+--------------------+--------------------|
| 34MB | (1) 512K x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 34MB | (1) 8M x 36 | (1) 512K x 36 |
|------------------+--------------------+--------------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 36MB | (1) 8M x 36 | (1) 1M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (1) 2M x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (1) 4M x 36 | (1) 8M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (1) 8M x 36 | (1) 4M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (1) 16M x 36 | None |
|------------------+--------------------+--------------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|-------------+---------------+---------------+--------------|
| 128KB | (4) 32K x 8 | None | (1) 8K x 8 |
|-------------+---------------+---------------+--------------|
| 256KB (A) | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 256KB (B) | (4) 64K x 8 | None | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 512KB (A) | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|-------------+---------------+---------------+--------------|
| 512KB (B) | (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 | J1 | J2 | J3 |
|-----------+----------------+---------------+---------------|
| 128KB | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (A) | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 256KB (B) | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 512KB (A) | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 512KB (B) | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|-----------+----------------+---------------+---------------|
| 1MB | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | J4 | J5 | J6 | J7 |
|-----------+------------+-----------+-----------+-----------|
| 128KB | Pins 1 & 2 | Pins 2 & | Pins 1 & | Pins 1 & |
| | closed | 3 closed | 2 closed | 2 closed |
|-----------+------------+-----------+-----------+-----------|
| 256KB (A) | Pins 1 & 2 | Pins 1 & | Pins 1 & | Pins 1 & |
| | closed | 2 closed | 2 closed | 2 closed |
|-----------+------------+-----------+-----------+-----------|
| 256KB (B) | Pins 1 & 2 | Pins 1 & | Pins 2 & | Pins 1 & |
| | closed | 2 closed | 3 closed | 2 closed |
|-----------+------------+-----------+-----------+-----------|
| 512KB (A) | Pins 2 & 3 | Pins 1 & | Pins 1 & | Pins 1 & |
| | closed | 2 closed | 2 closed | 2 closed |
|-----------+------------+-----------+-----------+-----------|
| 512KB (B) | Pins 2 & 3 | Pins 1 & | Pins 1 & | Pins 2 & |
| | closed | 2 closed | 2 closed | 3 closed |
|-----------+------------+-----------+-----------+-----------|
| 1MB | Pins 2 & 3 | Pins 1 & | Pins 1 & | Pins 1 & |
| | closed | 2 closed | 2 closed | 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|--------------------+-------------------+-------------------|
| 1MB | 1MB | None |
|--------------------+-------------------+-------------------|
| 2MB | 1MB | 1MB |
|------------------------------------------------------------|
| Note: The size of the chips are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | JP9 | JP10 | JP11 |
|---------+----------------+----------------+----------------|
| 25MHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 33MHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 40MHz | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 50iMHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 50MHz | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 66iMHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 75iMHz | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 |
| | closed | closed | closed |
|---------+----------------+----------------+----------------|
| 100iMHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | JP1 | JP2 | JP4 | JP5 | JP6 |
|-----------------+--------+--------+--------+-------+-------|
| CX486DX | Open | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| AM486DX (PLUS) | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| TI486DX | Open | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| CX486DX2 | Open | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| TI486DX2 | Open | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| AM486DX2 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| 80486DX2 | Open | 1 & 2 | 1 & 2 | Open | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| AM486DX4 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| CX486DX4 | Open | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| TI486DX4 | Open | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| 80486DX4 | Open | 1 & 2 | 1 & 2 | Open | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| SL80486DX4 | Open | 1 & 2 | 1 & 2 | Open | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| P24D | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| P24T | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| CX5X86 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| CX M9 | Open | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
|-----------------+--------+--------+--------+-------+-------|
| AM5X86 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 |
|------------------------------------------------------------|
| Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION (CON’T) |
|------------------------------------------------------------|
| Type | JP7 |JP35 | RN1 | RN1 | RN3 |
|--------------+-----+-----+-----------+----------+----------|
| CX486DX |1 & 2|1 & 2| Not |Installed | Not |
| | | | installed | |installed |
|--------------+-----+-----+-----------+----------+----------|
|AM486DX (PLUS)|1 & 2|1 & 2| Not | Not |Installed |
| | | | installed |installed | |
|--------------+-----+-----+-----------+----------+----------|
| TI486DX |1 & 2|1 & 2| Not |Installed | Not |
| | | | installed | |installed |
|--------------+-----+-----+-----------+----------+----------|
| CX486DX2 |1 & 2|1 & 2| Not |Installed | Not |
| | | | installed | |installed |
|--------------+-----+-----+-----------+----------+----------|
| TI486DX2 |1 & 2|1 & 2| Not |Installed | Not |
| | | | installed | |installed |
|--------------+-----+-----+-----------+----------+----------|
| AM486DX2 |1 & 2|1 & 2| Not | Not |Installed |
| | | | installed |installed | |
|--------------+-----+-----+-----------+----------+----------|
| 80486DX2 |1 & 2|2 & 3| Not | Not |Installed |
| | | | installed |installed | |
|--------------+-----+-----+-----------+----------+----------|
| AM486DX4 |1 & 2|1 & 2| Not | Not |Installed |
| | | | installed |installed | |
|--------------+-----+-----+-----------+----------+----------|
| CX486DX4 |1 & 2|1 & 2| Not |Installed | Not |
| | | | installed | |installed |
|--------------+-----+-----+-----------+----------+----------|
| TI486DX4 |1 & 2|1 & 2| Not |Installed | Not |
| | | | installed | |installed |
|--------------+-----+-----+-----------+----------+----------|
| 80486DX4 |1 & 2|1 & 2| Not | Not |Installed |
| | | | installed |installed | |
|--------------+-----+-----+-----------+----------+----------|
| SL80486DX4 |1 & 2|1 & 2| Not | Not |Installed |
| | | | installed |installed | |
|--------------+-----+-----+-----------+----------+----------|
| P24D |1 & 2|1 & 2| Not | Not |Installed |
| | | | installed |installed | |
|--------------+-----+-----+-----------+----------+----------|
| P24T |1 & 2|1 & 2| Not | Not |Installed |
| | | | installed |installed | |
|--------------+-----+-----+-----------+----------+----------|
| CX5X86 |1 & 2|1 & 2| Not | Not |Installed |
| | | | installed |installed | |
|--------------+-----+-----+-----------+----------+----------|
| CX M9 |1 & 2|1 & 2| Not | Not |Installed |
| | | | installed |installed | |
|--------------+-----+-----+-----------+----------+----------|
| AM5X86 |1 & 2|1 & 2| Not | Not |Installed |
| | | | installed |installed | |
|------------------------------------------------------------|
|Note: Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | J25 | JP24 |
|------------------+--------------------+--------------------|
| 3.3v | Open | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 3.45v | Open | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 5v | Pins 1 & 2 closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT RI SELECTION |
|------------------------------------------------------------|
| Setting | J26 (COM1) | J27 (COM2) |
|------------------+--------------------+--------------------|
| 5v | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| RI | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT DCD SELECTION |
|------------------------------------------------------------|
| Setting | J28 (COM1) | J29 (COM2) |
|------------------+--------------------+--------------------|
| 5v | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| DCD | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+