
INTEL CORPORATION

CLASSIC E EXPANDABLE DESKTOP

Processor         80486SX/ODP486/80487SX/80486DX/80486DX2
Processor Speed   16/20/25/33/50(internal)/66(internal)MHz
Chip Set          OPTI
Video Chip Set    None
Maximum Onboard   64MB
Memory
Maximum Video     None
Memory
Cache             64/128/256KB
BIOS              Phoenix
Dimensions        426mm x 416mm
I/O Options       32-bit VESA local bus slot, floppy drive interface, IDE
                  interface, parallel port, serial ports (2)
NPU Options       None

[Image]

                                CONNECTIONS

        Function            Label            Function            Label

  Chassis fan power          CN1       Serial port 2              J18

  External battery           CN2       Parallel port              J19

  Floppy drive               J13       Front panel connector      J25
  interface

  IDE interface              J14       32-bit VESA local bus      SL1
                                       slot

  Serial port 1              J16

                        USER CONFIGURABLE SETTINGS

                 Setting                      Label          Position

     Flash BIOS normal boot                   J3           Pins 2 & 3
                                                              closed

      Flash BIOS recovery mode boot            J3           Pins 1 & 2
                                                              closed

     On board I/O enabled                     J4           Pins 1 & 2
                                                              closed

      On board I/O disabled                    J4           Pins 2 & 3
                                                              closed

     Password normal operation                J7           Pins 2 & 3
                                                              closed

      Password clear                           J7           Pins 1 & 2
                                                              closed

     Parallel port direction select           J9           Pins 1 & 2
      output                                                  closed

      Parallel port direction select           J9           Pins 2 & 3
      input                                                   closed

     Parallel port direction select           J11          Pins 2 & 3
      hardware for redirection                                closed

      Parallel port direction select           J11          Pins 1 & 2
      software hardware for redirection                       closed

     Battery type select 3.6v/4.5v            J17          Pins 2 & 3
                                                              closed

      Battery type select 6v                   J17          Pins 1 & 2
                                                              closed

     CMOS memory normal operation         J25 pins 17        Closed
                                              & 18

      CMOS memory clear                    J25 pins 17         Open
                                              & 18

     Fan enabled                              J29          Pins 2 & 3
                                                              closed

      Fan disabled                             J29          Pins 1 & 2
                                                              closed

     12v flash BIOS enabled                   J30          Pins 1 & 2
                                                              closed

      12v flash BIOS disabled                  J30          Pins 2 & 3
                                                              closed

     Local bus ready select delayed           J31          Pins 1 & 2
                                                              closed

      Local bus ready select normal            J31          Pins 2 & 3
      operation                                               closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (1) 256K x        None           None           None
                    36

     2MB        (1) 256K x     (1) 256K x        None           None
                    36             36

     3MB        (1) 256K x     (1) 256K x     (1) 256K x        None
                    36             36             36

     4MB       (1) 1M x 36        None           None           None

     4MB        (1) 256K x     (1) 256K x     (1) 256K x    (1) 256K x 36
                    36             36             36

     5MB       (1) 1M x 36     (1) 256K x        None           None
                                   36

     5MB        (1) 256K x    (1) 1M x 36        None           None
                    36

     6MB       (1) 1M x 36     (1) 256K x     (1) 256K x        None
                                   36             36

     7MB       (1) 1M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     8MB       (1) 1M x 36    (1) 1M x 36        None           None

     9MB        (1) 256K x    (1) 1M x 36    (1) 1M x 36        None
                    36

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     12MB      (1) 1M x 36    (1) 1M x 36    (1) 1M x 36        None

     13MB       (1) 256K x    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36
                    36

     16MB      (1) 4M x 36        None           None           None

     16MB      (1) 1M x 36    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

     17MB      (1) 4M x 36     (1) 256K x        None           None
                                   36

     17MB       (1) 256K x    (1) 4M x 36        None           None
                    36

     18MB      (1) 4M x 36     (1) 256K x     (1) 256K x        None
                                   36             36

     19MB      (1) 4M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     20MB      (1) 4M x 36    (1) 1M x 36        None           None

     20MB      (1) 1M x 36    (1) 4M x 36        None           None

     24MB      (1) 4M x 36    (1) 1M x 36    (1) 1M x 36        None

     28MB      (1) 4M x 36    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

     32MB      (1) 4M x 36    (1) 4M x 36        None           None

     33MB       (1) 256K x    (1) 4M x 36    (1) 4M x 36        None
                    36

     36MB      (1) 1M x 36    (1) 4M x 36    (1) 4M x 36        None

     48MB      (1) 4M x 36    (1) 4M x 36    (1) 4M x 36        None

     49MB       (1) 256K x    (1) 4M x 36    (1) 4M x 36     (1) 4M x 36
                    36

     52MB      (1) 1M x 36    (1) 4M x 36    (1) 4M x 36     (1) 4M x 36

     64MB      (1) 4M x 36    (1) 4M x 36    (1) 4M x 36     (1) 4M x 36

  Note: The orientation of the banks is unidentified.

                        CACHE CONFIGURATION

         Size                 Bank 0                 Bank 1

         64KB               (4) 8K x 8             (4) 8K x 8

        128KB               (4) 32K x 8               None

        256KB               (4) 32K x 8           (4) 32K x 8

  Note: The chip sizes of the TAG and DIRTY bit are unidentified.

                      CACHE JUMPER CONFIGURATION

               Size                               J34

               None                               Open

               64KB                               Open

               128KB                    Pins 1 & 2, 5 & 6 closed

               256KB                Pins 1 & 2, 3 & 4, 7 & 8 closed

                     CPU SPEED SELECTION

        Speed                 J5                   J6

        16MHz          Pins 1 & 2 closed   Pins 1 & 2 closed

        20MHz          Pins 2 & 3 closed   Pins 1 & 2 closed

        25MHz          Pins 1 & 2 closed   Pins 2 & 3 closed

        33MHz          Pins 2 & 3 closed   Pins 2 & 3 closed

       50iMHz          Pins 1 & 2 closed   Pins 2 & 3 closed

       66iMHz          Pins 2 & 3 closed   Pins 2 & 3 closed

                            CPU TYPE SELECTION

          Type                     J32                      J33

         80486SX            Pins 3 & 4 closed        Pins 4 & 6 closed

         80487SX             Pins 1 & 2, 5 & 6        Pins 1 & 3, 2 & 4
                                  closed                   closed

         ODP486              Pins 1 & 2, 5 & 6        Pins 1 & 3, 2 & 4
                                  closed                   closed

         80486DX             Pins 1 & 2, 5 & 6        Pins 3 & 5, 4 & 6
                                  closed                   closed

        80486DX2             Pins 1 & 2, 5 & 6        Pins 3 & 5, 4 & 6
                                  closed                   closed

               MISCELLANEOUS TECHNICAL NOTE

  The location of pin 1 on all jumpers is unidentified.

