UNIDENTIFIED

TURBO 640

Processor         8088
Processor Speed   8MHz
Chip Set          None
Max. onboard DRAM 640KB
Cache             None
BIOS              Unknown
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       8087

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                    Location

  Turbo switch              JP5       Power/Turbo LED              JP9

  Keylock                   JP8       Speaker                      P4

  Note:The exact locations of JP5 and JP8 are unknown.

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

  »   Factory configured - do not            JP1              Unknown
      alter

  »   Factory configured - do not       SW1/switch 1            Off
      alter

  »   NPU enabled                       SW1/switch 2            Off

      NPU disabled                      SW1/switch 2             On

                            DRAM CONFIGURATION

  Size     Bank 0    Bank 1    Bank 2      Bank 3      JP3         JP4

  256KB      (8)       (8)     (8) 4164   (8) 4164     A & B    B closed
            4164      4164                            closed

  256KB      (8)      NONE      NONE        NONE       C & D    A closed
           41256                                      closed

  512KB      (8)       (8)      NONE        NONE       C & D    A closed
           41256     41256                            closed

  640KB      (8)       (8)       (8)         (8)       C & D    A closed
           41256     41256     4164KB      4164KB     closed

                  TURBO CONFIGURATION

       Mode               JP6                JP7

  Software switch         Open              Closed

  Hardware switch        Closed              Open

                           DISPLAY CONFIGURATION

    Display Adapter        SW1/5        SW1/6       SW1/7        SW1/8

          None               On          On          N/A          N/A

     Color/Graphics         Off          On           On           On
        (40x20)

     Color/Graphics          On          Off          On           On
        (80x25)

   Monochrome or Both       Off          Off          On           On

                FLOPPY DRIVE CONFIGURATION

  Drives Installed         SW1/7               SW1/8

         1                  On                  On

         2                  Off                 On

         3                  On                  Off

         4                  Off                 Off