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# HEWLETT-PACKARD COMPANY
HP VECTRA 486S/20
Processor 80486SX/80487SX
Processor 20MHz
Speed
Chip Set HP
Max. Onboard 64MB
DRAM
Cache 8KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options Mouse port, floppy drive interface, IDE
interface, parallel port, serial ports (2)
NPU Options None
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Mouse port | CN1 | External battery | J1 |
|----------------+----------+---------------------+----------|
| Parallel port | CN2 | IDE interface LED | J2 |
|----------------+----------+---------------------+----------|
| Serial port 1 | CN3 | Speaker | J3 |
|----------------+----------+---------------------+----------|
| Serial port 2 | CN4 | Control panel | J4 |
| | | connector | |
|----------------+----------+---------------------+----------|
| Floppy drive | CN6 | | |
| interface | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Switch | Position |
|--------------------------------------+--------+------------|
| | BIOS write protect enabled | SW1 | "Locked" |
|---+----------------------------------+--------+------------|
| | BIOS write protect disabled | SW1 | "Unlocked" |
|---+----------------------------------+--------+------------|
| » | CMOS normal operation | SW2/1 | Off |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | SW2/1 | On |
|---+----------------------------------+--------+------------|
| » | Do not erase power-on password | SW2/2 | Off |
| | in CMOS | | |
|---+----------------------------------+--------+------------|
| | Erase power-on password in CMOS | SW2/2 | On |
|---+----------------------------------+--------+------------|
| » | Lock EISA configuration settings | SW2/3 | On |
|---+----------------------------------+--------+------------|
| | Unlock EISA configuration | SW2/3 | Off |
| | settings | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 2MB | (2) 256K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 4MB | (2) 512KB x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 4MB | (2) 256K x | (2) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (2) 256K x | (2) 256K x | (2) 256K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 8MB | (2) 256K x | (2) 256K x | (2) 256K x | (2) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (2) 512KB x | (2) 512KB x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 8MB | (2) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 10MB | (2) 1M x 36 | NONE | (2) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 12MB | (2) 1M x 36 | NONE | (2) 512KB | NONE |
| | | | x 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (2) 2M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 18MB | (2) 1M x 36 | (2) 1M x 36 | (2) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 18MB | (2) 2M x 36 | NONE | (2) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | (2) 2M x 36 | NONE | (2) 512K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 20MB | (2) 2M x 36 | NONE | (2) 256K x | (2) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (2) 1M x 36 | (2) 1M x 36 | (2) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (2) 2M x 36 | (2) 512K x | (2) 512K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 24MB | (2) 2M x 36 | NONE | (2) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 2M x 36 | (2) 1M x 36 | (2) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 | (2) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (2) 2M x 36 | (2) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 36MB | (2) 2M x 36 | (2) 512K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 36MB | (2) 2M x 36 | (2) 256K x | (2) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (2) 2M x 36 | (2) 2M x 36 | (2) 512K x | (2) 512K x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CONTINUED) |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 40MB | (2) 2M x 36 | (2) 2M x 36 | (2) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 48MB | (2) 2M x 36 | (2) 2M x 36 | (2) 1M x | (2) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (2) 2M x 36 | (2) 2M x 36 | (2) 2M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 64MB | (2) 2M x 36 | (2) 2M x 36 | (2) 2M x | (2) 2M x |
| | | | 36 | 36 |
+------------------------------------------------------------+