VTECH INDUSTRIES, INC.

486 ASIC II

Processor       80486SX/80487SX/ODP486SX/80486DX/80486DX2
Processor Speed 20/25/33/50(internal)/66(internal)MHz
Chip Set        Unidentified
Max. Onboard    32MB
DRAM
Cache           128KB
BIOS            Unidentified
Dimensions      330mm x 218mm
I/O Options     Floppy drive interface, game port, IDE interface, parallel
                port, serial ports (2), VGA port
NPU Options     None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Front panel connector       J2       Serial port 2               J11

  IDE interface LED           J3       IDE interface               J12

  External battery            J4       Parallel port               J13

  Speaker                     J5       Game port                   J14

  Floppy drive interface      J9       VGA port                    J16

  Serial port 1               J10      Riser Card                  SL1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Factory configured - do not             JP6           pins 2 & 3
      alter                                                   closed

  »   Battery type select internal            JP7           pins 1 & 2
                                                              closed

      Battert type select external            JP7           pins 2 & 3
                                                              closed

  »   CMOS memory normal operation            JP8           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP8           pins 2 & 3
                                                              closed

  »   Factory configured - do not             JP9             Closed
      alter

  »   Factory configured - do not             JP11          pins 2 & 3
      alter                                                   closed

  »   On board I/O enabled                    JP17            Closed

      On board I/O disabled                   JP17             Open

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      2MB         (4) 512K x 9       NONE

      4MB         (4) 512K x 9   (4) 512K x 9

      4MB         (4) 1M x 9         NONE

      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

     128KB      (4) 32K x 8

     128KB      (4) 32K x 9

                        CACHE JUMPER CONFIGURATION

    Size          JP1            JP2             JP3             JP4

   128KB       pins 1 & 2     pins 1 & 2      pins 1 & 2      pins 1 & 2
                closed          closed         closed          closed

   128KB       pins 2 & 3     pins 2 & 3      pins 2 & 3      pins 2 & 3
                closed          closed         closed          closed

                          CPU TYPE CONFIGURATION

                 Type                                 JP10

               80486SX                         pins 1 & 2 closed

               ODP486SX                        pins 2 & 3 closed

               80487SX                         pins 2 & 3 closed

               80486DX                         pins 1 & 2 closed

               80486DX2                        pins 1 & 2 closed

            Note: There is a PQFP socket installed but the location is
            unidentifed. These CPU types are installed in the PGA socket.

                CPU SPEED CONFIGURATION

           Speed                        JP5

           20MHz             pins 1 & 2, 5 & 6 closed

           25MHz                 pins 5 & 6 closed

           33MHz             pins 1 & 2, 3 & 4 closed

           50iMHz                pins 5 & 6 closed

           66iMHz            pins 1 & 2, 3 & 4 closed

                  VRAM CONFIGURATION

  Note: The size of the VRAM memory is unidentified.