UNIDENTIFIED

YL-A09S/YL-A09H

Processor         80286
Processor Speed   16MHz
Chip Set          Headland
Max. Onboard DRAM 5MB
Cache             None
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80287

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery            JP1       Reset switch               JP8

  Power LED & keylock         JP6       Turbo LED                  JP9

  Speaker                     JP7       Turbo switch              JP10

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

      Internal delay select GC113            F13             pins 2 & 3
                                                               closed

      Internal delay select GC103            F13             pins 1 & 2
                                                               closed

  »   Factory configured - do not            JP5                N/A
      alter

      BIOS type select 27128                 JP13            pins 1 & 2
                                                               closed

      BIOS type select 27256                 JP13            pins 2 & 3
                                                               closed

  »   NPU mode select synchronous            JP14            pins 2 & 3
      with CPU                                                 closed

      NPU mode select synchronous            JP14            pins 1 & 2
      with oscillator installed at                             closed
      Y3

  »   Parity check enabled                   JP15            pins 1 & 2
                                                               closed

      Parity check disabled                  JP15            pins 2 & 3
                                                               closed

  »   Monitor type select color             SW1/5                On

      Monitor type select                   SW1/5               Off
      monochrome

  »   Shadow RAM enabled                    SW1/6               Off

      Shadow RAM disabled                   SW1/6                On

  »   Bus speed select fast                 SW1/7               Off

      Bus speed select slow                 SW1/7                On

                            DRAM CONFIGURATION

  Size      Bank 0     Bank 1     Bank 2     Bank 3     Bank 4    Bank 5

  512KB       (4)       NONE       NONE       NONE       NONE      NONE
            44256

  512KB      NONE       NONE       NONE       NONE        (2)      NONE
                                                        256K x
                                                          9

   1MB        (4)        (4)       NONE       NONE       NONE      NONE
            44256      44256

   1MB       NONE       NONE       NONE       NONE        (2)       (2)
                                                        256K x     256K x
                                                          9          9

  1.5MB       (4)        (4)        (4)       NONE       NONE      NONE
            44256      44256      44256

  1.5MB      NONE       NONE        (4)       NONE        (2)       (2)
                                  44256                 256K x     256K x
                                                          9          9

   2MB        (4)        (4)        (4)        (4)       NONE      NONE
            44256      44256      44256       44256

   2MB       NONE       NONE        (4)        (4)        (2)       (2)
                                  44256       44256     256K x     256K x
                                                          9          9

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

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

   5MB       NONE       NONE        (4)        (4)      (2) 1M     (2) 1M
                                  44256       44256      x 9        x 9

  Note:Locations of Banks 0, 1, 2, & 3 are unidentified.

                     DRAM JUMPER/SWITCH CONFIGURATION

   Size      JP11        JP12      SW1/1     SW1/2      SW1/3     SW1/4

  512KB     2 & 3, 5   2 & 3, 5     On        Off        Off       Off
            & 6, 8 &   & 6, 8 &
               9          9

  512KB     1 & 2, 4   1 & 2, 4     On        Off        Off       Off
            & 5, 7 &   & 5, 7 &
               8          8

   1MB      2 & 3, 5   2 & 3, 5     Off        On        Off       Off
            & 6, 8 &   & 6, 8 &
               9          9

   1MB      1 & 2, 4   1 & 2, 4     Off        On        Off       Off
            & 5, 7 &   & 5, 7 &
               8          8

  1.5MB     2 & 3, 5   2 & 3, 5     Off       Off        On        Off
            & 6, 8 &   & 6, 8 &
               9          9

  1.5MB     1 & 2, 4   1 & 2, 4     Off       Off        On        Off
            & 5, 7 &   & 5, 7 &
               8          8

   2MB      2 & 3, 5   2 & 3, 5     Off        On        On        Off
            & 6, 8 &   & 6, 8 &
               9          9

   2MB      1 & 2, 4   1 & 2, 4     Off        On        On        Off
            & 5, 7 &   & 5, 7 &
               8          8

   2MB      1 & 2, 4   1 & 2, 4     Off       Off        Off        On
            & 5, 7 &   & 5, 7 &
               8          8

   4MB      1 & 2, 4   1 & 2, 4     Off        On        Off        On
            & 5, 7 &   & 5, 7 &
               8          8

   5MB      1 & 2, 4   1 & 2, 4     On         On        On         On
            & 5, 7 &   & 5, 7 &
               8          8

  Note:Pins designated should be in the closed postion