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# INTEL CORPORATION
CLASSIC E EXPANDABLE DESKTOP
Processor 80486SX/ODP486/80487SX/80486DX/80486DX2
Processor Speed 16/20/25/33/50(internal)/66(internal)MHz
Chip Set OPTI
Video Chip Set None
Maximum Onboard 64MB
Memory
Maximum Video None
Memory
Cache 64/128/256KB
BIOS Phoenix
Dimensions 426mm x 416mm
I/O Options 32-bit VESA local bus slot, floppy drive
interface, IDE interface, parallel port,
serial ports (2)
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|--------------------+-------+-----------------------+-------|
| Chassis fan power | CN1 | Serial port 2 | J18 |
|--------------------+-------+-----------------------+-------|
| External battery | CN2 | Parallel port | J19 |
|--------------------+-------+-----------------------+-------|
| Floppy drive | J13 | Front panel connector | J25 |
| interface | | | |
|--------------------+-------+-----------------------+-------|
| IDE interface | J14 | 32-bit VESA local bus | SL1 |
| | | slot | |
|--------------------+-------+-----------------------+-------|
| Serial port 1 | J16 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|------------------------------------+----------+------------|
| » | Flash BIOS normal boot | J3 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | Flash BIOS recovery mode boot | J3 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| » | On board I/O enabled | J4 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | On board I/O disabled | J4 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| » | Password normal operation | J7 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | Password clear | J7 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| » | Parallel port direction select | J9 | Pins 1 & 2 |
| | output | | closed |
|---+--------------------------------+----------+------------|
| | Parallel port direction select | J9 | Pins 2 & 3 |
| | input | | closed |
|---+--------------------------------+----------+------------|
| » | Parallel port direction select | J11 | Pins 2 & 3 |
| | hardware for redirection | | closed |
|---+--------------------------------+----------+------------|
| | Parallel port direction select | J11 | Pins 1 & 2 |
| | software hardware for | | closed |
| | redirection | | |
|---+--------------------------------+----------+------------|
| » | Battery type select 3.6v/4.5v | J17 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | Battery type select 6v | J17 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| » | CMOS memory normal operation | J25 pins | Closed |
| | | 17 & 18 | |
|---+--------------------------------+----------+------------|
| | CMOS memory clear | J25 pins | Open |
| | | 17 & 18 | |
|---+--------------------------------+----------+------------|
| » | Fan enabled | J29 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | Fan disabled | J29 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| » | 12v flash BIOS enabled | J30 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | 12v flash BIOS disabled | J30 | Pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| » | Local bus ready select delayed | J31 | Pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | Local bus ready select normal | J31 | Pins 2 & 3 |
| | operation | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | None | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | None | None |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | None |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | None | None |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 256K x | (1) 1M x 36 | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | None |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 9MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | None |
| | 36 | | 36 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON’T) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 13MB | (1) 256K x | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | None | None | None |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 256K x | None | None |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 256K x | (1) 4M x 36 | None | None |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | None |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 1M x 36 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 256K x | (1) 4M x 36 | (1) 4M x | None |
| | 36 | | 36 | |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | None |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 49MB | (1) 256K x | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | 36 | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 52MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
|------------------------------------------------------------|
| Note: The orientation of the banks is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|-----------------+---------------------+--------------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 |
|-----------------+---------------------+--------------------|
| 128KB | (4) 32K x 8 | None |
|-----------------+---------------------+--------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 |
|------------------------------------------------------------|
| Note: The chip sizes of the TAG and DIRTY bit are |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | J34 |
|--------------------------+---------------------------------|
| None | Open |
|--------------------------+---------------------------------|
| 64KB | Open |
|--------------------------+---------------------------------|
| 128KB | Pins 1 & 2, 5 & 6 closed |
|--------------------------+---------------------------------|
| 256KB | Pins 1 & 2, 3 & 4, 7 & 8 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | J5 | J6 |
|------------------+--------------------+--------------------|
| 16MHz | Pins 1 & 2 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 20MHz | Pins 2 & 3 closed | Pins 1 & 2 closed |
|------------------+--------------------+--------------------|
| 25MHz | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 33MHz | Pins 2 & 3 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 50iMHz | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 66iMHz | Pins 2 & 3 closed | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | J32 | J33 |
|----------+------------------------+------------------------|
| 80486SX | Pins 3 & 4 closed | Pins 4 & 6 closed |
|----------+------------------------+------------------------|
| 80487SX | Pins 1 & 2, 5 & 6 | Pins 1 & 3, 2 & 4 |
| | closed | closed |
|----------+------------------------+------------------------|
| ODP486 | Pins 1 & 2, 5 & 6 | Pins 1 & 3, 2 & 4 |
| | closed | closed |
|----------+------------------------+------------------------|
| 80486DX | Pins 1 & 2, 5 & 6 | Pins 3 & 5, 4 & 6 |
| | closed | closed |
|----------+------------------------+------------------------|
| 80486DX2 | Pins 1 & 2, 5 & 6 | Pins 3 & 5, 4 & 6 |
| | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTE |
|------------------------------------------------------------|
| The location of pin 1 on all jumpers is unidentified. |
+------------------------------------------------------------+