
ASUS COMPUTER INTERNATIONAL

ISA-486SIQ

Processor            80486SX/80487SX/80486DX/80486DX2
Processor Speed      20/25/33/50(internal)/50/66(internal)MHz
Chip Set             OPTI
Max. Onboard DRAM    32MB
SRAM Cache           64/128/256KB
BIOS                 AMI
Dimensions           220mm x 240mm
I/O Options          None
NPU Options          None

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Reset                       CON1      Turbo LED                 CON4

  Speaker                     CON2      Turbo switch              CON5

  Power LED & keylock         CON3

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CPU speed select 25/33/50MHz             JP1           pins 2 & 3
                                                              closed

      CPU speed select 20MHz                   JP1           pins 1 & 2
                                                              closed

     Monitor type select monochrome           JP2           pins 1 & 2
                                                              closed

      Monitor type select color                JP2           pins 2 & 3
                                                              closed

              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

      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

                    SRAM CONFIGURATION

     Size          Cache         Location         TAG

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

     128KB      (4) 32K x 8       Bank 0      (1) 8K x 8

     256KB      (8) 32K x 8    Banks 0 & 1    (1) 32K x 8

                         SRAM JUMPER CONFIGURATION

      Size           Jumper CJ1          Jumper CJ2         Jumper CJ3

      64KB            pins 1 & 2         pins 1 & 2            open
                       closed              closed

      128KB           pins 2 & 3            open              closed
                       closed

      256KB           pins 2 & 3         pins 2 & 3            open
                       closed              closed

                         CPU JUMPER CONFIGURATION

     CPU         Jumper CPJ1          Jumper CPJ2          Jumper CPJ3

   80486DX        pins 2 & 3      pins 1 & 2 and 3 & 4      pins 2 & 3
                    closed               closed               closed

   80487SX        pins 1 & 2      pins 1 & 2 and 3 & 4      pins 1 & 2
                    closed               closed               closed

   80486SX           open          pins 2 & 3 closed        pins 2 & 3
                                                              closed

