UNIDENTIFIED

12MHZ TURBO XT MAINBOARD

Processor         8088
Processor Speed   12MHz
Chip Set          Unidentified
Max. Onboard DRAM 640KB
Cache             None
BIOS              Unidentified
Dimensions        220mm x 220mm
I/O Options       None
NPU Options       8087

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Power LED                  CN3       Power LED & keylock         CN6

  Reset switch               CN4       Turbo LED                   CN7

  Speaker                    CN5       Turbo switch                CN8

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch        Position

  »   Memory wait state select 0             J6                Open
      wait states

      Memory wait state select 1             J6               Closed
      wait state

  »   Parity check disabled                 SW/1                On

      Parity check enabled                  SW/1                Off

  »   Factory configured - do not           SW/2                On
      alter

                            DRAM CONFIGURATION

     Size            Bank 0              Bank 1              Bank 2

    256KB       (2) 414256 & (1)          NONE                NONE
                     41256

    512KB       (2) 414256 & (1)    (2) 414256 & (1)          NONE
                     41256               41256

    640KB       (2) 414256 & (1)    (2) 414256 & (1)     (2) 414256 & (1)
                     41256               41256                41256

  DRAM SWITCH CONFIGURATION

   Size      SW/3     SW/4

  256KB      Off       On

  512KB       On       Off

  640KB      Off       Off

             MONITOR DISPLAY CONFIGURATION

      Display             SW/5               SW/6

  Color (40 x 25)         Off                 On

  Color (80 x 25)          On                Off

    Monochrome            Off                Off

                FLOPPY DRIVE CONFIGURATION

  Drives installed         SW/7                SW/8

         1                  On                  On

         2                  Off                 On

         3                  On                  Off

         4                  Off                 Off