
AST RESEARCH, INC.

PREMIUM/286

(MODELS 202143-001 & 202143-002)

Processor               80286DX
Processor Speed         10MHz
Chip Set                AST
Max. Onboard DRAM       None (2/4 or 8/16MB on external memory card(s))
Cache                   None
BIOS                    AST
Dimensions              330mm x 218mm
I/O Options             32-bit external memory/CPU card slot (2), parallel
                        port, serial port
NPU Options             80287

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                Location

  32-bit external            CN1        Front panel              J25
  memory/CPU card                       switches & LEDs

  32-bit external            CN2        Optional ROM (odd)       U11
  memory/CPU card

  External battery           J22        Optional ROM             U13
                                        (even)

  Speaker                    J24

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Serial port 1              COM1      Keyboard                   KYBD

  Parallel port              LPT1

                         SERIAL PORT CONFIGURATION

    Serial Port      Jumper E24-E25       Jumper E31        Jumper E32
      (COM1)

    COM1: using         pins 1 & 2          closed             open
       IRQ4              closed

    COM2: using         pins 2 & 3           open             closed
       IRQ3              closed

                        PARALLEL PORT CONFIGURATION

    Parallel Port     Jumper E27    Jumper E28   Jumper E29   Jumper E30
       (LPT)

  LPT1: using IRQ7      closed        open         closed        open

  LPT2: using IRQ7       open        closed         open        closed

               BIOS TYPE CONFIGURATION

  BIOS Type    Jumper E4    Jumper E5    Jumper E6

    27128        open          open        closed

    27256       closed        closed        open

                      OPTIONAL ROM TYPE CONFIGURATION

  ROM Type     Address        Jumper      Jumper      Jumper      Jumper
                               E10         E11         E12         E13

   27128      F000-F7FFh      open        open       closed       open

   27128      E800-EFFFh      open        open        open       closed

   27256      E000-EFFFh     closed      closed       open        open

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not alter        E2              open

     BIOS wait state select one               E3              open

      BIOS wait states select zero             E3             closed

     Latched PROM BIOS disabled               E7              open

      Latched PROM BIOS enabled                E7             closed

     Latched PROM BIOS (for optional       E8, E14 &          open
      ROMs) disabled                           E15

      Latched PROM BIOS (for optional       E8, E14 &         closed
      ROMs) enabled                            E15

     Optional ROM wait state select           E9              open
      one

      Optional ROM wait states select          E9             closed
      zero

     I/O bus wait states select two           E20            closed
      (at 10MHz operation)

      I/O bus wait state select one (at        E20             open
      10MHz operation)

     Factory configured - do not alter        E21             open

[Image]

            USER CONFIGURABLE SETTINGS FOR FASTRAM MEMORY BOARD

              Function                  Jumper/Switch        Position

     Parity check enabled                   E1               closed

      Parity check disabled                  E1                open

     Wait states select zero                E2               closed

      Wait state select one                  E2                open

     Page mode disabled                SW1/switch 5          closed

      Page mode enabled                 SW1/switch 5           open

     Board installed select first      SW1/switch 6          closed
      FASTram board installed

      Board installed select            SW1/switch 6           open
      second FASTram board
      installed

            DRAM CONFIGURATION FOR FASTRAM MEMORY BOARD

    Size         Bank 0       Bank 1        Bank 2        Bank 3

    512KB      (18) 41256      NONE          NONE          NONE

     1MB       (18) 41256   (18) 41256       NONE          NONE

    1.5MB      (18) 41256   (18) 41256    (18) 41256       NONE

     2MB       (18) 41256   (18) 41256    (18) 41256    (18) 41256

            DRAM SWITCH CONFIGURATION FOR FASTRAM MEMORY BOARD

  Recognized by   SW1/switch     SW1/switch    SW1/switch    SW1/switch 4
     System           1              2             3

     128KB          closed        closed         closed         closed

     256KB           open         closed         closed         closed

     384KB          closed         open          closed         closed

     512KB           open          open          closed         closed

     640KB          closed        closed          open          closed

     768KB           open         closed          open          closed

     896KB          closed         open           open          closed

     1024KB          open          open           open          closed

     1152KB         closed        closed         closed          open

     1280KB          open         closed         closed          open

     1408KB         closed         open          closed          open

     1536KB          open          open          closed          open

     1664KB         closed        closed          open           open

     1792KB          open         closed          open           open

     1920KB         closed         open           open           open

     2048KB          open          open           open           open

          BASE I/O ADDRESS CONFIGURATION FOR FASTRAM MEMORY BOARD

   Base I/O    SW1/switch 7    SW1/switch 8   SW1/switch 9    SW1/switch
   Address                                                        10

    0208h         closed         closed         closed          closed

   0218h 1         open          closed         closed          closed

   0258h 2         open          closed          open           closed

    0268h         closed          open           open           closed

    02A8h         closed          open          closed           open

    02B8h          open           open          closed           open

    02E8h         closed          open           open            open

  Note 1 :This setting is recommended when this is the first FASTram
  Memory Board installed.

  Note 2 :This setting is recommended when this is the second FASTram
  Memory Board installed.

[Image]

       USER CONFIGURABLE SETTINGS FOR ADVANCED FASTRAM MEMORY BOARD

                Function                     Jumper          Position

     Factory configured - do not alter       E0-E1          pins 2 & 3
                                                              closed

     Board installed select first             E2              open
      FASTram board installed
                                               E4             closed

      Board installed select second            E2             closed
      FASTram board installed
                                               E4              open

     Memory installed select as               E3             closed
      expanded

      Memory installed select as paged         E3              open

  Note:Parity, wait states, size, and base I/O address are set using the
  software configuration utility.

           DRAM CONFIGURATION FOR ADVANCED FASTRAM MEMORY BOARD

     Size          Bank 0        Bank 1         Bank 2         Bank 3

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

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

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

      2MB       (2) 256K x 9   (2) 256K x 9   (2) 256K x 9  (2) 256K x 9

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

      3MB       (2) 256K x 9   (2) 256K x 9   (2) 1M x 9        NONE

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

      5MB       (2) 256K x 9   (2) 256K x 9   (2) 1M x 9     (2) 1M x 9

      6MB        (2) 1M x 9    (2) 1M x 9     (2) 1M x 9        NONE

      8MB        (2) 1M x 9    (2) 1M x 9     (2) 1M x 9     (2) 1M x 9

