
ICL

INDIANA C-SERIES/S-SERIES

Processor  80486SX/80486SX2/80486DX/80486DX2/AM486DX4/80486DX4
Processor  25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   Acer
Max.       36MB
Onboard
DRAM
Cache      128/256KB
BIOS       Acer
Dimensions 295mm x 254mm
I/O        PS/2 mouse port, parallel port, serial ports (2), VGA port, VGA
Options    feature connector, floppy drive interface, IDE interface
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose               Location      Purpose                  Location

  VGA port                 J1         VGA feature connector       J6

  Parallel port            J2         IDE interface 1             J7

  Serial port 1            J3         IDE interface 2             J8

  Serial port 2            J4         Floppy drive                J9
                                      interface

  PS/2 mouse port          J5         DX4 voltage kit         JPX4 & JPX5
                                      connectors

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

     Normal BIOS startup display              JP1           pins 1 & 2
                                                              closed

      BIOS displays Acer logo                  JP1           pins 2 & 3
                                                              closed

     Password enabled                         JP2           pins 1 & 2
                                                              closed

      Password disabled                        JP2           pins 2 & 3
                                                              closed

     Boot mode select normal boot             JP3           pins 1 & 2
                                                              closed

      Boot mode select mono/COM1 boot          JP3           pins 2 & 3
                                                              closed

     First 8MB of memory enabled              JP4           pins 1 & 2
                                                              closed

      First 8MB of memory disabled             JP4           pins 2 & 3
                                                              closed

     On-board memory enabled                  JP5           pins 2 & 3
                                                              closed

      On-board memory disabled                 JP5           pins 1 & 2
                                                              closed

     Super I/O chip enabled                   JP6           pins 2 & 3
                                                              closed

      Super I/O chip disabled                  JP6           pins 1 & 2
                                                              closed

     VGA port enabled                         JP9           pins 2 & 3
                                                              closed

      VGA port disabled                        JP9           pins 1 & 2
                                                              closed

     IDE address port select 0F4h,            JP10          pins 1 & 2
      0F8h, and 0FCh                                          closed

      IDE address port select 074h,            JP10          pins 2 & 3
      078h, and 07Ch                                          closed

     Reset button mode normal                 JP28          pins 2 & 3
                                                              closed

      Reset button mode suspend/resume         JP28          pins 1 & 2
                                                              closed

     IDE interface enabled                    JP29          pins 2 & 3
                                                              closed

      IDE interface disabled                   JP29          pins 1 & 2
                                                              closed

     BIOS type select EPROM                   JPX1          pins 2 & 3
                                                              closed

      BIOS type select flash                   JPX1          pins 1 & 2
                                                              closed

     Factory configured - do not alter        JPX3             N/A

                    DRAM CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2

      4MB        (8) 441000        NONE          NONE

      8MB        (8) 441000    (1) 1M x 36       NONE

     12MB        (8) 441000    (1) 1M x 36    (1) 1M x 36

     20MB        (8) 441000    (1) 4M x 36       NONE

     24MB        (8) 441000    (1) 4M x 36    (1) 1M x 36

     36MB        (8) 441000    (1) 4M x 36    (1) 4M x 36

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     128KB      (4) 32K x 8        NONE       (1) 32K x 8

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8

                  CACHE JUMPER CONFIGURATION

        Size                 JP30                 JP31

        128KB          pins 1 & 2 closed   pins 1 & 2 closed

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

                       CPU TYPE CONFIGURATION

    Type       JPX2        JP13       JP14        JP15       JP17

  80486SX      2 & 3      2 & 3       2 & 3       2 & 3      2 & 3

  80486SX2     2 & 3      2 & 3       2 & 3       2 & 3      2 & 3

  80486DX      2 & 3      2 & 3       2 & 3       2 & 3      2 & 3

  80486DX2     2 & 3      2 & 3       2 & 3       2 & 3      2 & 3

  AM486DX4     2 & 3      2 & 3       2 & 3       2 & 3      2 & 3

  80486DX4     2 & 3      2 & 3       2 & 3       2 & 3      2 & 3

  Note: Pins designated should be in the closed position.

                   CPU TYPE CONFIGURATION (CONT)

    Type       JP18        JP19       JP20        JP21       JP22

  80486SX      2 & 3      2 & 3       2 & 3       2 & 3      2 & 3

  80486SX2     2 & 3      2 & 3       2 & 3       2 & 3      2 & 3

  80486DX      2 & 3      1 & 2       2 & 3       2 & 3      1 & 2

  80486DX2     2 & 3      1 & 2       2 & 3       2 & 3      1 & 2

  AM486DX4     1 & 2      1 & 2       2 & 3       2 & 3      2 & 3

  80486DX4     1 & 2      1 & 2       2 & 3       2 & 3      2 & 3

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

      Type         JP23        JP25        JP26        JP27       JP32

    80486SX        2 & 3       2 & 3      2 & 3       3 & 4       1 & 2

    80486SX2       2 & 3       2 & 3      2 & 3       3 & 4       1 & 2

    80486DX        2 & 3       2 & 3      1 & 2       3 & 4       1 & 2

    80486DX2       2 & 3       2 & 3      1 & 2       3 & 4       1 & 2

    AM486DX4       2 & 3       2 & 3      2 & 3       3 & 4       1 & 2

    80486DX4       2 & 3       2 & 3      2 & 3       3 & 4       1 & 2

  Note: Pins designated should be in the closed position. The locations
  of JP27 & JP32 are unidentified.

                   CPU SPEED CONFIGURATION

        Speed                JP11                 JP12

        25MHz          pins 1 & 5 closed   pins 2 & 3 closed

        33MHz          pins 2 & 6 closed   pins 2 & 3 closed

       50iMHz          pins 1 & 5 closed   pins 2 & 3 closed

       66iMHz          pins 2 & 6 closed   pins 2 & 3 closed

       75iMHz          pins 1 & 5 closed   pins 2 & 3 closed

       100iMHz         pins 2 & 6 closed   pins 2 & 3 closed

  CPU SPEED CONFIGURATION (80486DX4 ONLY)

        Speed                  JP27

          2x            pins 2 & 3 closed

         2.5x           pins 1 & 2 closed

          3x            pins 3 & 4 closed

   CPU VOLTAGE CONFIGURATION (80486DX4-100 ONLY)

         Voltage                     JMP1

          3.45v               pins 1 & 5 closed

           3.6v               pins 2 & 6 closed

           3.8v               pins 3 & 7 closed

            4v                pins 4 & 8 closed

  Note: JMP1 is located on the voltage regulator.

                  PARALLEL PORT DMA CHANNEL CONFIGURATION

       DRQ             DACK               JP7                 JP8

          3              3             pins 1 & 2      pins 1 & 2 closed
                                          closed

          3              1             pins 1 & 2      pins 2 & 3 closed
                                          closed

          1              3             pins 2 & 3      pins 1 & 2 closed
                                          closed

          1              1             pins 2 & 3      pins 2 & 3 closed
                                          closed

