
UNIDENTIFIED

PMS486DS

Processor         80486DX
Processor Speed   20/25/33/50MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/128/256/512KB
BIOS              AMI
Dimensions        330.2mm x 218.4mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            J3       Speaker                     J18

  Turbo switch                J16      Power LED & keylock         J19

  Reset switch                J17      Turbo LED                   J20

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CMOS memory normal operation             J4            pins 2 & 3
                                                              closed

      CMOS memory clear                        J4            pins 1 & 2
                                                              closed

     Monitor type select color                J5             closed

      Monitor type select monochrome           J5              open

     CPU speed select iOSC/2                  J9            pins 2 & 3
                                                              closed

      CPU speed select iOSC                    J9            pins 1 & 2
                                                              closed

      Bus speed select ATCLK/6                 J10            closed

      Bus speed select ATCLK/4                 J10             open

              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

      16MB        (4) 4M x 9         NONE

      17MB        (4) 256K x 9    (4) 4M x 9

      20MB        (4) 1M x 9      (4) 4M x 9

      32MB        (4) 4M x 9      (4) 4M x 9

                            CACHE CONFIGURATION

  Size     Cache CACHE        Location        TAG (U42)       TAG (U55)

  64KB      (8) 8K x 8         Bank 0        (1) 64K x 1     (1) 8K x 8

  128KB    (16) 8K x 8      Banks 0 & 1      (1) 64K x 1     (1) 8K x 8

  256KB    (8) 32K x 8         Bank 0        (1) 64K x 1     (1) 32K x 8

  512KB    (16) 32K x 8     Banks 0 & 1      (1) 64K x 1     (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

  Size        J11          J12          J13         J14           J15

  64KB        open        open         open         open       pins 2 & 3
                                                                closed

  128KB       open        open        closed       closed      pins 2 & 3
                                                                closed

  256KB       open       closed       closed       closed      pins 2 & 3
                                                                closed

  512KB      closed      closed       closed       closed      pins 1 & 2
                                                                closed

                        CPU JUMPER CONFIGURATION

    CPU             J6                   J7                   J8

  80486DX    pins 1 & 2 closed         closed         pins 2 & 3 closed

  80487SX    pins 2 & 3 closed         closed         pins 2 & 3 closed

  80486SX          open                 open          pins 1 & 2 closed

