AMERICAN RESEARCH CORPORATION

X TURBO

Processor         8088
Processor Speed   4/6MHz
Chip Set          Unidentified
Max. Onboard DRAM 640KB
Cache             None
BIOS              Unidentified
Dimensions        330mm x 218mm
I/O Options       Proprietary slots (2)
NPU Options       8087

[Image]

               CONNECTIONS

  Purpose                  Location

  Proprietary slots       SL1 - SL2

                        USER CONFIGURABLE SETTINGS

                Function                    Switch           Position

  »   Turbo enabled                          SW2/1             Off

      Turbo disabled                         SW2/1              On

  »   NPU disabled                           SW2/2              On

      NPU enabled                            SW2/2             Off

                       DRAM CONFIGURATION

    Size        Bank 0       Bank 1      Bank 2       Bank 3

    64KB       (9) 4164       NONE        NONE         NONE

    128KB      (9) 4164     (9) 4164      NONE         NONE

    192KB      (9) 4164     (9) 4164    (9) 4164       NONE

    256KB      (9) 4164     (9) 4164    (9) 4164     (9) 4164

    256KB     (9) 41256       NONE        NONE         NONE

    640KB     (9) 41256    (9) 41256    (9) 4164     (9) 4164

  DRAM SWITCH CONFIGURATION

   Size     SW2/3     SW2/4

   64KB       On       On

  128KB      Off       On

  192KB       On       Off

  256KB      Off       Off

  640KB      Off       Off

                         DRAM SWITCH CONFIGURATION

  Size     SW3/1   SW3/2   SW3/3    SW3/4   SW3/5   SW3/6   SW3/7   SW3/8

  Bank 0    Off     On      Off      On     Off      On     Off      On
  & 1 =
  41256

  Bank 2    Off     On      Off      On     Off      On     Off      On
  & 3 =
  4164

                     DRAM SWITCH CONFIGURATION (CON’T)

  Size     SW4/1   SW4/2   SW4/3    SW4/4   SW4/5   SW4/6   SW4/7   SW4/8

  Bank 0    Off     On      Off      On     Off      On     Off      On
  & 1 =
  41256

  Bank 2    Off     On      Off      On     Off      On     Off      On
  & 3 =
  4164

                         DRAM SWITCH CONFIGURATION

  Size     SW3/1   SW3/2   SW3/3   SW3/4   SW3/5   SW3/6   SW3/7   SW3/8

  Bank 0    On     Off      On      Off     On      Off     On      Off
  & 1 =
  4164

  Bank 2    On     Off      On      Off     On      Off     On      Off
  & 3 =
  4164

                     DRAM SWITCH CONFIGURATION (CON’T)

  Size     SW4/1   SW4/2   SW4/3   SW4/4   SW4/5   SW4/6   SW4/7   SW4/8

  Bank 0    On     Off      On      Off     On      Off     On      Off
  & 1 =
  4164

  Bank 2    On     Off      On      Off     On      Off     On      Off
  & 3 =
  4164

              MONITOR CONFIGURATION

      Type            SW2/5            SW2/6

   Monochrome          Off              Off

  40 x 25 color        Off               On

  80 x 25 color         On              Off

  FLOPPY DRIVE CONFIGURATION

   Type     SW2/7      SW2/8

    1         On        On

    2        Off        On

    3         On        Off

    4        Off        Off