DELL COMPUTER CORPORATION

SYSTEM 220

Processor

80286

Processor Speed

20MHz

Chip Set

VLSI

Max. Onboard DRAM

8MB

Cache

None

BIOS

AMI

Dimensions

362mm x 182mm

I/O Options

16-bit riser card slot, floppy drive interface, IDE interface

parallel port, serial port (2), VGA feature connector, VGA port

NPU Options

80287-8MHz

CONNECTIONS

Purpose

Location

Purpose

Location

VGA port

CN1

IDE interface

CN6

Parallel port

CN2

VGA feature

CN7

Serial port 2

CN3

Front panel switches & LEDs

FPSL

Serial port 1

CN4

16-bit riser card

S1

Floppy drive interface

CN5

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Factory configured - do not alter

J1

unknown

»

Factory configured - do not alter

J2

unknown

»

Factory configured - do not alter

J3

unknown

»

Factory configured - do not alter

J4

unknown

»

Monitor type select color

W1

closed

 

Monitor type select monochrome

W1

open

»

Serial port 2 (CN3) enabled

W4/pins 1 & 2

closed

 

Serial port 2 (CN3) disabled

W4/pins 1 & 2

open

»

Serial port 1 (CN4) enabled

W4/pins 3 & 4

closed

 

Serial port 1 (CN4) disabled

W4/pins 3 & 4

open

»

Parallel port (CN2) select LPT1

W4/pins 5 & 6

W4/pins 7 & 8

open

closed

 

Parallel port (CN2) select LPT2

W4/pins 5 & 6

W4/pins 7 & 8

closed

open

 

Parallel port disabled

W4/pins 5 & 6

W4/pins 7 & 8

open

open

»

IDE interface (CN6) enabled

W5

closed

 

IDE interface (CN6) disabled

W5

open

»

Floppy drive interface (CN5) enabled

W6

closed

 

Floppy drive interface (CN5) disabled

W6

open

»

IDE interleave select 1:1

W7

pins 2 & 3 closed

 

IDE interleave select 3:1

W7

pins 1 & 2 closed

»

VGA port enabled

W11

open

 

VGA port disabled

W11

pins 1 & 2 closed

»

Factory configured - do not alter

W15

W16

pins 1 & 2 closed

open

Note:The location of Jumpers W5 and W6 are unverified.

BASE MEMORY CONFIGURATION

Select

W10

W12

W13

»

640KB

open

pins 1 & 2 closed

pins 2 & 3 closed

 

256KB

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9