
MONOLITHIC SYSTEMS, INC. (COLORADO MSI)

SBC486IE PISA SINGLE BOARD

Processor         80486SX/80486DX
Processor Speed   20/25/33/50(internal)/66(internal)MHz
Chip Set          C & T PEAK DM
Max. Onboard DRAM 128MB
Cache             128KB
BIOS              AMI
Dimensions        339mm x 127mm
I/O Options       PS/2 mouse port, PS/2 keyboard connector
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  External battery            J3       Power LED                   J9

  Speaker                     J5       Reset switch               J10

  Power LED & keylock         J6       PS/2 keyboard              J14

  Front panel switches        J8       PS/2 mouse                 J15
  & LEDs

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

     Factory configured - do not alter         J1           pins 1 & 2
                                                              closed

     Factory configured - do not alter         J2            Closed

     Factory configured - do not alter         J7           pins 1 & 2
                                                              closed

     CMOS memory normal operation              J4             Open

      CMOS memory clear                         J4            Closed

     Monitor type select color                J11           pins 2 & 3
                                                              closed

      Monitor type select monochrome           J11           pins 1 & 2
                                                              closed

     PS/2 mouse disabled (IRQ12 free)         J12             Open

      PS/2 mouse enabled at IRQ12              J12            Closed

     Watchdog timer disabled                  J13           pins 2 & 3
                                                              closed

      Watchdog timer enabled                   J13           pins 1 & 2
                                                              closed

     DMA signal select active high            J16           pins 1 & 2
                                                              closed

      DMA signal select active low             J16           pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2          Bank 3

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

      2MB        (1) 512K x        NONE          NONE            NONE
                     36

      3MB        (1) 512K x     (1) 256K x       NONE            NONE
                     36             36

      4MB        (1) 512K x     (1) 512K x       NONE            NONE
                     36             36

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

      5MB        (1) 512K x     (1) 512K x     (1) 256K x        NONE
                     36             36            36

      6MB        (1) 512K x     (1) 512K x     (1) 512K x        NONE
                     36             36            36

      7MB        (1) 512K x     (1) 512K x     (1) 512K x     (1) 256K x
                     36             36            36              36

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

      8MB       (1) 2M x 36        NONE          NONE            NONE

      9MB       (1) 2M x 36     (1) 256K x       NONE            NONE
                                    36

     10MB       (1) 2M x 36     (1) 512K x       NONE            NONE
                                    36

     12MB       (1) 2M x 36     (1) 512K x     (1) 512K x        NONE
                                    36            36

     13MB       (1) 2M x 36     (1) 512K x     (1) 512K x     (1) 256K x
                                    36            36              36

     16MB       (1) 2M x 36    (1) 2M x 36       NONE            NONE

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

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

     18MB       (1) 2M x 36    (1) 2M x 36     (1) 512K x        NONE
                                                  36

     19MB       (1) 4M x 36     (1) 512K x     (1) 256K x        NONE
                                    36            36

     20MB       (1) 2M x 36    (1) 2M x 36    (1) 1M x 36        NONE

     32MB       (1) 8M x 36        NONE          NONE            NONE

     40MB       (1) 8M x 36    (1) 2M x 36       NONE            NONE

     64MB       (1) 8M x 36    (1) 8M x 36       NONE            NONE

     96MB       (1) 8M x 36    (1) 8M x 36    (1) 4M x 36    (1) 4M x 36

     128MB      (1) 8M x 36    (1) 8M x 36    (1) 8M x 36    (1) 8M x 36

  Note: These are only some of the possible configurations. Memory must
  be installed in lower banks first, according to module capacity
  (highest to lowest).

