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

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  VGA port                   CN1       IDE interface              CN6

  Parallel port              CN2       VGA feature                CN7

  Serial port 2              CN3       Front panel switches       FPSL
                                       & LEDs

  Serial port 1              CN4       16-bit riser card           S1

  Floppy drive               CN5
  interface

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Factory configured - do not              J1             unknown
      alter

  »   Factory configured - do not              J2             unknown
      alter

  »   Factory configured - do not              J3             unknown
      alter

  »   Factory configured - do not              J4             unknown
      alter

  »   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        open

                                          W4/pins 7 & 8       closed

      Parallel port (CN2) select LPT2     W4/pins 5 & 6       closed

                                          W4/pins 7 & 8        open

      Parallel port disabled              W4/pins 5 & 6        open

                                          W4/pins 7 & 8        open

  »   IDE interface (CN6) enabled              W5             closed

      IDE interface (CN6) disabled             W5              open

  »   Floppy drive interface (CN5)             W6             closed
      enabled

      Floppy drive interface (CN5)             W6              open
      disabled

  »   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             W15            pins 1 & 2
      alter                                                   closed
                                              W16
                                                               open

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

                         BASE MEMORY CONFIGURATION

       Select               W10              W12                W13

  »       640KB            open           pins 1 & 2         pins 2 & 3
                                            closed            closed

          256KB          pins 1 & 2       pins 2 & 3         pins 1 & 2
                          closed            closed            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