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# INTEL CORPORATION
4DX2-66
Processor 80486DX/ODP486DX/80486DX2/80486DX4/P24D/P24T
Processor 25/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set Unidentified
Video Chip Cirrus Logic
Set
Maximum 64MB
Onboard
Memory
Maximum 1MB
Video
Memory
Cache 128KB
BIOS Phoenix
Dimensions 254mm x 218mm
I/O 32-bit PCI slots (3), floppy drive interface, IDE interfaces
Options (2), parallel port, PS/2 mouse port, serial ports (2), VESA
feature connector, VGA port
NPU None
Options
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| VESA feature | CN1 | IDE interface 1 | J21 |
| connector | | | |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | J1 | Power LED & | J29 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| VGA port | J4 | Reset switch | J32 |
|-------------------+----------+------------------+----------|
| Serial port 1 | J12 | IDE interface | J34 |
| | | LED | |
|-------------------+----------+------------------+----------|
| Serial port 2 | J13 | Speaker | J37 |
|-------------------+----------+------------------+----------|
| Parallel port | J17 | Turbo LED | J40 |
|-------------------+----------+------------------+----------|
| Floppy drive | J18 | Chassis fan | J41 |
| interface | | power | |
|-------------------+----------+------------------+----------|
| IDE interface 2 | J19 | 32-bit PCI slots | PC1 - |
| | | | PC3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------+-------+------------------|
| » | Secondary IDE DMA disabled | J26 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------+-------+------------------|
| | Secondary IDE DMA enabled | J26 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------+-------+------------------|
| » | Password normal operation | J31 | Open |
|---+-----------------------------+-------+------------------|
| | Password clear | J31 | Closed |
|---+-----------------------------+-------+------------------|
| » | Boot block normal operation | J35 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------+-------+------------------|
| | Boot block boot from floppy | J35 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------+-------+------------------|
| » | On board I/O enabled | J36 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------+-------+------------------|
| | On board I/O disabled | J36 | Pins 1 & 2 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|-----------------+---------------------+--------------------|
| 4MB | (1) 1M x 36 | None |
|-----------------+---------------------+--------------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 |
|-----------------+---------------------+--------------------|
| 8MB | (1) 2M x 36 | None |
|-----------------+---------------------+--------------------|
| 12MB | (1) 2M x 36 | (1) 1M x 36 |
|-----------------+---------------------+--------------------|
| 16MB | (1) 2M x 36 | (1) 2M x 36 |
|-----------------+---------------------+--------------------|
| 16MB | (1) 4M x 36 | None |
|-----------------+---------------------+--------------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 |
|-----------------+---------------------+--------------------|
| 24MB | (1) 4M x 36 | (1) 2M x 36 |
|-----------------+---------------------+--------------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 |
|-----------------+---------------------+--------------------|
| 32MB | (1) 8M x 36 | None |
|-----------------+---------------------+--------------------|
| 36MB | (1) 1M x 36 | (1) 8M x 36 |
|-----------------+---------------------+--------------------|
| 40MB | (1) 2M x 36 | (1) 8M x 36 |
|-----------------+---------------------+--------------------|
| 48MB | (1) 4M x 36 | (1) 8M x 36 |
|-----------------+---------------------+--------------------|
| 64MB | (1) 8M x 36 | (1) 8M x 36 |
|------------------------------------------------------------|
| Note: Board also accepts x 32 SIMMs. Banks are |
| interchangeable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | J30 |
|----------------------------+-------------------------------|
| x 32 SIMMs | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| x 36 SIMMs | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|------------------------------+-----------------------------|
| 128KB | 128KB |
|------------------------------------------------------------|
| Note: The location of bank 0 is unidentified. The size of |
| the cache chips are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J24 | J25 |
|------------------+--------------------+--------------------|
| 128KB | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Note: Board is factory installed with 1MB of video |
| memory and is not configurable. The location is |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | J39 |
|----------------------------+-------------------------------|
| 25MHz | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 50iMHz | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 66iMHz | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 75iMHz | Pins 2 & 3 closed |
|----------------------------+-------------------------------|
| 100iMHz | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | J38 |
|----------------------------+-------------------------------|
| 80486DX | Pins 3 & 4 closed |
|----------------------------+-------------------------------|
| ODP486DX | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 80486DX2 | Pins 3 & 4 closed |
|----------------------------+-------------------------------|
| 8086DX4 | Pins 3 & 4 closed |
|----------------------------+-------------------------------|
| P24D | Pins 5 & 6 closed |
|----------------------------+-------------------------------|
| P24T | Pins 5 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | J27 |
|--------------------------------+---------------------------|
| » | SL-series | Pins 2 & 3 closed |
|--------+-----------------------+---------------------------|
| | Non SL-series | Pins 1 & 2 closed |
|------------------------------------------------------------|
| Note: Do not change this from the default setting. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU MULTIPLIER SELECTION |
|------------------------------------------------------------|
| Multiplier | J33 |
|----------------------------+-------------------------------|
| | Reserved | Pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| | 2x | Pins 2 & 3 closed |
|---+------------------------+-------------------------------|
| » | 3x | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE SELECTION |
|------------------------------------------------------------|
| Voltage | J3 |
|----------------------------+-------------------------------|
| | 3.3v | Pins 1 & 3, 2 & 4 closed |
|---+------------------------+-------------------------------|
| » | 5v | Pins 3 & 5, 4 & 6 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | J22 | J23 |
|------------------+--------------------+--------------------|
| » | 1 | Pins 1 & 2 closed | Pins 1 & 2 closed |
|----+-------------+--------------------+--------------------|
| | 3 | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+