
UNIDENTIFIED

GH-286

Processor         80286
Processor Speed   10/12MHz
Chip Set          G-2
Max. Onboard DRAM 4MB
Cache             None
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Turbo switch                 J4       Speaker                    J17

  External battery            J14       Turbo LED                  J19

  Power LED & keylock         J16       Reset switch               J20

                        USER CONFIGURABLE SETTINGS

               Function                   Jumper/Switch       Position

     CPU speed select                         J4             pins 1 & 2
      [CTRL][ALT][+] = fast,                                   closed
      [CTRL][ALT][-] = slow

      CPU speed select fast                    J4             pins 2 & 3
                                                               closed

     NPU mode select synchronous              JP2            pins 2 & 3
      with CPU                                                 closed

      NPU mode select asynchronous             JP2            pins 1 & 2
      with CPU                                                 closed

     Parity check enabled                     JP3             Closed

      Parity check disabled                    JP3              Open

     DRAM select 0 wait states                J18            pins 2 & 3
                                                               closed

      DRAM select 1 wait state                 J18              Open

      DRAM wait states select                  J18            pins 1 & 2
      [CTRL][ALT][0] = 0                                       closed
      [CTRL][ALT][1] = 1

     Monitor type select color               SW1/1              On

      Monitor type select monochrome          SW1/1              Off

                            DRAM CONFIGURATION

   Size      Bank 0      P-0       Bank 1       P-1      Bank 2   Bank 3

  512KB        (4)        (2)       NONE       NONE       NONE     NONE
             44256      41256

  640KB        (4)        (2)      (4) 4464   (2) 4164    NONE     NONE
             44256      41256

   1MB         (4)        (2)        (4)        (2)       NONE     NONE
             44256      41256       44256      41256

   2MB        NONE       NONE       NONE       NONE      (2) 1M    NONE
                                                          x 9

   4MB        NONE       NONE       NONE       NONE      (2) 1M    (2) 1M
                                                          x 9       x 9

      DRAM SWITCH CONFIGURATION

  Size     SW1/2    SW1/3    SW1/4

  512KB     On        On      Off

  640KB     On       Off       On

   1MB      On       Off      Off

   2MB      Off      Off       On

   4MB      Off      Off      Off

