
MONOLITHIC SYSTEMS, INC. (COLORADO MSI)

SBC486PE PEISA SINGLE BOARD

Processor        80486SX/80386DX/80486DX2
Processor Speed  25/33/40/50(internal)/50/66(internal)MHz
Chip Set         Intel
Max. Onboard     128MB
DRAM
Cache            128/256KB (on 32-bit external cache module)
BIOS             AMI
Dimensions       339mm x 127mm
I/O Options      32-bit external cache module slot, PS/2 mouse port, PS/2
                 keyboard connector
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                Location

  IDE interface LED           J1        Power LED & keylock       J7

  Reset switch                J2        Auxiliary keyboard        J8

  Power LED                   J3        PS/2 keyboard             J9

  External battery            J4        PS/2 mouse                J11

  Front panel switches        J5        32-bit external           S1
  & LEDs                                cache module

  Speaker                     J6

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CMOS memory normal operation             J10             Open

      CMOS memory clear                        J10            Closed

     Monitor type select color                J12            Closed

      Monitor type select monochrome           J12             Open

     Watchdog timer disabled                  J13           pins 2 & 3
                                                              closed

      Watchdog timer enabled                   J13           pins 1 & 2
                                                              closed

     Factory configured - do not alter        J14            Closed

     Factory configured - do not alter        J14            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

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

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

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

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

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

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

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

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

     32MB       (1) 2M x 36    (1) 2M x 36    (1) 2M x 36    (1) 2M x 36

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

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

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

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

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

     96MB       (1) 8M x 36    (1) 8M x 36    (1) 8M x 36       NONE

    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. All modules
  must be of like capacity.

