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# DELL COMPUTER CORPORATION
SYSTEM 486/L
Processor 80486SX/80487SX/80486DX/80486DX2
Processor 25/33/50(internal)/66(internal)MHz
Speed
Chip Set LSI
Max. Onboard 64MB (on external card)
DRAM
Cache 128KB
BIOS Phoenix
Dimensions 330mm x 218mm
I/O Options External cache card, floppy drive interface, IDE
interface, parallel port, PS/2 mouse port, serial
ports (2), VGA feature connector, VGA port
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| PS/2 mouse port | CN1 | Floppy drive | CN7 |
| | | interface | |
|-----------------+----------+--------------------+----------|
| Serial port 1 | CN2 | Video memory | CN8 |
| | | upgrade connector | |
|-----------------+----------+--------------------+----------|
| Serial port 2 | CN3 | VGA feature | CN9 |
| | | connector | |
|-----------------+----------+--------------------+----------|
| Parallel port | CN4 | IDE interface LED | J11 |
|-----------------+----------+--------------------+----------|
| VGA port | CN5 | External cache | SL1 |
| | | card | |
|-----------------+----------+--------------------+----------|
| IDE interface | CN6 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------------------+---------+----------|
| » | Password enabled | J1 | Closed |
|---+-----------------------------------+---------+----------|
| | Password disabled | J1 | Open |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | J2 | Open |
|---+-----------------------------------+---------+----------|
| » | Flash BIOS write protect enabled | J3 | Closed |
|---+-----------------------------------+---------+----------|
| | Flash BIOS write protect disabled | J3 | Open |
|---+-----------------------------------+---------+----------|
| » | On board VGA enabled | J4 | Closed |
|---+-----------------------------------+---------+----------|
| | On board VGA disabled | J4 | Open |
|---+-----------------------------------+---------+----------|
| » | External cache card not installed | J5 | Closed |
|---+-----------------------------------+---------+----------|
| | External cache card installed | J5 | Open |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | J6 | Open |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | J9 | Open |
|---+-----------------------------------+---------+----------|
| » | Factory configured - do not alter | J10 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M 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 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 52MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | J7 | J8 |
|--------------------+-------------------+-------------------|
| 25MHz | Open | Closed |
|--------------------+-------------------+-------------------|
| 33MHz | Closed | Open |
|--------------------+-------------------+-------------------|
| 50iMHz | Open | Closed |
|--------------------+-------------------+-------------------|
| 66iMHz | Closed | Open |
+------------------------------------------------------------+