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# NEC TECHNOLOGIES, INC.
IMAGE 425/433/466
Processor 80486SX/80487DX/80486DX/ODP486SX/80486DX2
Processor 25/33/50(internal)/66(internal)MHz
Speed
Chip Set C & T
Max. Onboard 64MB
DRAM
Cache 256KB expandable
BIOS Intel
Dimensions 220mm x 220mm
I/O Options Cache expansion slot, floppy drive interface, IDE
interface, multifunction connector
(PS/2 mouse, PS/2 keyboard, power LED), parallel
port, proprietary ethernet slot
SCSI interface, serial port (2, 1 optional), VGA
port, VGA feature connector
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|--------------------+----------+-----------------+----------|
| IDE interface | J7 | Cache expansion | J18 |
| | | slot | |
|--------------------+----------+-----------------+----------|
| Floppy drive | J8 | Speaker (not | JP1 |
| interface | | used) | |
|--------------------+----------+-----------------+----------|
| VGA feature | J9 | Reset switch | JP3 |
| connector | | | |
|--------------------+----------+-----------------+----------|
| Optional disk | J12 | Serial port 1 | P1 |
| power supply | | | |
|--------------------+----------+-----------------+----------|
| External battery | J13 | Serial port 2 | P2 |
| | | (optional) | |
|--------------------+----------+-----------------+----------|
| IDE interface LED | J14 | VGA port | P3 |
| (not used) | | | |
|--------------------+----------+-----------------+----------|
| Proprietary | J15 | Parallel port | P4 |
| Ethernet slot | | | |
|--------------------+----------+-----------------+----------|
| Proprietary riser | J16 | Multifunction | P5 |
| card slot | | connector | |
|--------------------+----------+-----------------+----------|
| SCSI interface | J17 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper/Switch | Position |
|---------------------------------+---------------+----------|
| » | Factory configured do not | JP2 | Open |
| | alter | | |
|---+-----------------------------+---------------+----------|
| » | ROM emulation enabled | JP4 | Open |
|---+-----------------------------+---------------+----------|
| | ROM emulation disabled | JP4 | Closed |
|---+-----------------------------+---------------+----------|
| » | Onboard video enabled | SW1/switch 1 | Off |
|---+-----------------------------+---------------+----------|
| | Onboard video disabled | SW1/switch 1 | On |
|---+-----------------------------+---------------+----------|
| » | Floppy interface enabled | SW1/switch 2 | Off |
|---+-----------------------------+---------------+----------|
| | Floppy interface disabled | SW1/switch 2 | On |
|---+-----------------------------+---------------+----------|
| » | System password enabled | SW1/switch 3 | Off |
|---+-----------------------------+---------------+----------|
| | System password disabled | SW1/switch 3 | On |
|---+-----------------------------+---------------+----------|
| » | Flash BIOS write protect | SW1/switch 4 | Off |
| | enabled | | |
|---+-----------------------------+---------------+----------|
| | Flash BIOS write protect | SW1/switch 4 | On |
| | disabled | | |
|---+-----------------------------+---------------+----------|
| » | BIOS programming via | SW1/switch 5 | Off |
| | network enabled | | |
|---+-----------------------------+---------------+----------|
| | BIOS programming via | SW1/switch 5 | On |
| | network disabled | | |
|---+-----------------------------+---------------+----------|
| » | CPU speed select 25/50iMHz | SW1/switch 6 | On |
|---+-----------------------------+---------------+----------|
| | CPU speed select 33/66iMHz | SW1/switch 6 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5M | (1) 1M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 6M | (1) 1M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 7M | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8M | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 9M | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 10M | (1) 1M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 12M | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 13M | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16M | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16M | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 17M | (1) 4M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 18M | (1) 4M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 19M | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20M | (1) 4M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 21M | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 22M | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24M | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 25M | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 28M | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32M | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 33M | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 36M | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 37M | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 40M | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48M | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 49M | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 52M | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64M | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+