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# DELL COMPUTER CORPORATION
SYSTEM V486/50/66 MDT
Processor 80486DX/80486DX2/Pentium Overdrive
Processor 25/33/50(internal)/66(internal)MHz
Speed
Chip Set Unidentified
Max. Onboard 64MB
DRAM
Cache 128KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, IDE interface, parallel
port, serial ports (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| External battery | CN1 | Floppy drive | CN6 |
| | | interface | |
|-------------------+----------+------------------+----------|
| IDE interface LED | CN2 | Parallel port | CN7 |
|-------------------+----------+------------------+----------|
| Chassis fan power | CN3 | Serial ports | CN8 |
|-------------------+----------+------------------+----------|
| Video connector | CN4 | Mouse connector | CN9 |
|-------------------+----------+------------------+----------|
| IDE interface | CN5 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|----------------------------------------+--------+----------|
| » | Mouse connector enabled (uses | J1 | Closed |
| | IRQ12) | | |
|---+------------------------------------+--------+----------|
| | Mouse connector disabled (disables | J1 | Open |
| | IRQ12) | | |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | J2 | Closed |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | J3 | Open |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | J4 | Closed |
|---+------------------------------------+--------+----------|
| » | CMOS memory normal operation | J5 | Closed |
|---+------------------------------------+--------+----------|
| | CMOS memory clear | J5 | Open |
|---+------------------------------------+--------+----------|
| » | On board VGA controller enabled | J6 | Closed |
|---+------------------------------------+--------+----------|
| | On board VGA controller disabled | J6 | Open |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | J7 | Open |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | J8 | Open |
|---+------------------------------------+--------+----------|
| » | Factory configured - do not alter | J11 | 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 | J9 | J10 |
|--------------------+-------------------+-------------------|
| 25MHz | Closed | N/A |
|--------------------+-------------------+-------------------|
| 33MHz | N/A | Closed |
|--------------------+-------------------+-------------------|
| 50iMHz | Open | N/A |
|--------------------+-------------------+-------------------|
| 66iMHz | N/A | Open |
+------------------------------------------------------------+