
CHICONY, INC.

CH-486-33/50P

Processor              80486SX/80487SX/80486DX/80486DX2/P23T/P24T
Processor Speed        20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set               UMC
Video Chip Set         None
Maximum Onboard Memory 32MB
Maximum Video Memory   None
Cache                  64/128/256KB
BIOS                   AMI
Dimensions             254mm x 218mm
I/O Options            32-bit VESA local bus slots (2)
NPU Options            None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Power LED & keylock         J1       Reset switch                J5

  Speaker                     J2       External battery            J6

  Turbo switch                J3       32-bit VESA local bus   SL1 & SL2
                                       slots

  Turbo LED                   J4

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

      Monitor type select color                W1             Closed

      Monitor type select monochrome           W1              Open

      Battery type select internal            W14             Closed

      Battery type select external            W14              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

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

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

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (U30)      TAG (U31)

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8        None

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

   256KB (A)    (4) 32K x 8    (4) 32K x 8    (1) 32K x 8       None

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

                   CACHE JUMPER CONFIGURATION

    Size          W6           W7          W8           W9

    64KB         Open         Open        Open         Open

    128KB        Open        Closed       Open        Closed

  256KB (A)     Closed       Closed      Closed       Closed

  256KB (B)     Closed       Closed      Closed       Closed

                    CACHE JUMPER CONFIGURATION (CONT)

    Size           W10            W11            W12             W13

    64KB        Pins 1 & 2     Pins 1 & 2     Pins 1 & 2      Pins 1 & 2
                 closed          closed         closed         closed

    128KB       Pins 2 & 3     Pins 1 & 2     Pins 1 & 2      Pins 2 & 3
                 closed          closed         closed         closed

  256KB (A)     Pins 1 & 2     Pins 2 & 3     Pins 2 & 3      Pins 2 & 3
                 closed          closed         closed         closed

  256KB (B)     Pins 1 & 2     Pins 2 & 3     Pins 2 & 3      Pins 2 & 3
                 closed          closed         closed         closed

               CPU SPEED SELECTION

  Speed      W15       W16       W17       W18

  20MHz     Closed    Closed    Closed    Closed

  25MHz     Closed     Open      Open     Closed

  33MHz      Open      Open      Open     Closed

  40MHz     Closed     Open      Open      Open

  50iMHz    Closed     Open      Open     Closed

  50MHz      Open      Open      Open      Open

  66iMHz     Open      Open      Open     Closed

                            CPU TYPE SELECTION

          Type                      W2                       W3

         80486SX            Pins 2 & 3 closed               Open

         80487SX             Pins 1 & 2, 3 & 4       Pins 1 & 2 closed
                                  closed

         80486DX             Pins 1 & 2, 3 & 4       Pins 2 & 3 closed
                                  closed

        80486DX2             Pins 1 & 2, 3 & 4       Pins 2 & 3 closed
                                  closed

          P23T               Pins 1 & 2, 3 & 4       Pins 1 & 2 closed
                                  closed

          P24T               Pins 1 & 2, 3 & 4       Pins 2 & 3 closed
                                  closed

  VL BUS WAIT STATE SELECTION

    Setting            W4

       0              Open

       1             Closed

  VL BUS SPEED SELECTION

    Speed          W5

  <= 33MHz        Open

   >33 MHz       Closed

