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# HEWLETT-PACKARD COMPANY
HP VECTRA 486U PC Series
Processor 80486SX/80487SX/80486DX/80486DX2
Processor Speed 25/33/50(internal)/66(internal)MHz
Chip Set HP
Max. Onboard 64MB
DRAM
Cache None
BIOS HP
Dimensions 276mm x 325mm
I/O Options Bus mouse port, floppy interface, IDE
interface, serial ports (2), parallel port,
VGA port
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| VGA port | CN1 | Parallel port | CN4 |
|------------------+----------+-------------------+----------|
| Serial port 2 | CN2 | Bus mouse port | CN5 |
|------------------+----------+-------------------+----------|
| Serial port 1 | CN3 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Switch | Position |
|--------------------------------------+--------+------------|
| » | Factory configured - do not | SW1/2 | Off |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | SW1/3 | Off |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | VGA port enabled | SW1/4 | Off |
|---+----------------------------------+--------+------------|
| | VGA port disabled | SW1/4 | On |
|---+----------------------------------+--------+------------|
| » | CMOS memory normal operation | SW1/1 | Off |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | SW1/1 | On |
|---+----------------------------------+--------+------------|
| » | Password check enabled | SW1/2 | Off |
|---+----------------------------------+--------+------------|
| | Password check disabled | SW1/2 | On |
| | (password clear) | | |
|---+----------------------------------+--------+------------|
| » | Security mode disabled (CMOS | SW1/3 | Off |
| | setup may be changed) | | |
|---+----------------------------------+--------+------------|
| | Security mode enabled (CMOS | SW1/3 | On |
| | setup may not be changed) | | |
|---+----------------------------------+--------+------------|
| » | BIOS write protect enabled | SW4 | position 2 |
|---+----------------------------------+--------+------------|
| | BIOS write protect disabled | SW4 | position 1 |
| | (BIOS may be upgraded from disk) | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 4MB | (2) 512K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 8MB | (2) 512K x | (2) 512K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 12MB | (2) 512K x | (2) 512K x | (2) 512K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (2) 512K x | (2) 512K x | (2) 512K x | (2) 512K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (2) 2M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 20MB | (2) 2M x 36 | (2) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 24MB | (2) 2M x 36 | (2) 512K x | (2) 512K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 28MB | (2) 2M x 36 | (2) 512K x | (2) 512K x | (2) 512K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 36MB | (2) 2M x 36 | (2) 2M x 36 | (2) 512K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (2) 2M x 36 | (2) 2M x 36 | (2) 512K x | (2) 512K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (2) 2M x 36 | (2) 2M x 36 | (2) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 52MB | (2) 2M x 36 | (2) 2M x 36 | (2) 2M x | (2) 512K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (2) 2M x 36 | (2) 2M x 36 | (2) 2M x | (2) 2M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | SW3/1 | SW3/2 | SW3/3 |
|------------------------+-----------+-----------+-----------|
| 80487SX-25MHz | Off | Off | Off |
|------------------------+-----------+-----------+-----------|
| ODP486SX-50MHz | Off | Off | Off |
|------------------------+-----------+-----------+-----------|
| ODP486SX-66MHz | Off | Off | On |
|------------------------+-----------+-----------+-----------|
| 80486DX-33MHz | On | On | On |
|------------------------+-----------+-----------+-----------|
| 80486DX2-50MHz | On | On | Off |
|------------------------+-----------+-----------+-----------|
| 80486DX2-66MHz | On | On | On |
|------------------------------------------------------------|
| Note:Install the 80487SX or ODP486SX processors in the |
| Upgrade CPU socket. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 512KB | NONE |
|----------------------------+-------------------------------|
| 1024KB | (4) 44256 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/1 |
|-------------------------------+----------------------------|
| 512KB | Off |
|-------------------------------+----------------------------|
| 1024KB | On |
+------------------------------------------------------------+