
JC INFORMATION SYSTEMS CORPORATION

486 SX/DX MODEL 270

Processor         80486SX/80487SX/80486DX/80486DX2
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          C & T
Max. Onboard DRAM 32MB
Cache             64/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       32-bit memory expansion slot
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                Location     Purpose                  Location

  External battery          J11       32 bit memory               SL1
                                      expansion slot

  Power LED & keylock       J20       Reset switch                SW1

  Speaker                   J21       Turbo switch                SW2

  Turbo LED                JP11

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Enable onboard battery                  JP1           pins 2 & 3
                                                              closed

      Enable external battery                 JP1              Open

     Monitor type select color               JP2             Closed

      Monitor type select monochrome          JP2              Open

     Factory configured do not alter         JP3              N/A

     Factory configured do not alter         JP4              N/A

     Factory configured do not alter         JP5              N/A

     Factory configured do not alter         JP7              N/A

     Factory configured do not alter         JP9              N/A

     Factory configured do not alter         JP10             N/A

     Turbo switch not available              JP11            Closed

     Factory configured do not alter         JP12             N/A

              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) 1M x 9     (4) 256K x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

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

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

            CACHE CONFIGURATION

     Size          Bank 0          TAG

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

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

