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SYSTEM 220

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