
UNIDENTIFIED

286 VLSI TURBO MAINBOARD

Processor         80286
Processor Speed   12/16MHz
Chip Set          VLSI
Max. Onboard DRAM 4MB
Cache             None
BIOS              AMI/Award/Phoenix
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            J13      Power LED & keylock         J16

  Turbo switch                J14      Reset switch                J18

  Turbo LED                   J15      Speaker                     J19

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     IOCHRDY select normal                    J4            pins 1 & 2
                                                              closed

      IOCHRDY select add on card               J4            pins 2 & 3
                                                              closed

     Monitor type select color                J7            pins 2 & 3
                                                              closed

      Monitor type select monochrome           J7            pins 1 & 2
                                                              closed

     Shadow BIOS enabled                      J8              Open

      Shadow BIOS disabled                     J8             Closed

     Parity check enabled                     J12           pins 1 & 2
                                                              closed

      Parity check disabled                    J12           pins 2 & 3
                                                              closed

                            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 JUMPER CONFIGURATION

   Size       J9       J10       J11

  512KB      Open    Closed    Closed

  640KB     Closed    Open     Closed

   1MB      Closed    Open     Closed

   2MB       Open     Open      Open

   4MB      Closed    Open      Open

