AMERICAN MEGATRENDS, INC.

ATLAS VIP

Processor              Pentium
Processor Speed        90/100MHz
Chip Set               American Megatrends
Max. Onboard DRAM      128MB
Cache                  256/512KB
BIOS                   AMI
Dimensions             330mm x 218mm
I/O Options            32-bit PCI slots (3), 32-bit VESA local bus slots
                       (2), floppy drive interface, IDE interface,
                       parallel port, PS/2 mouse port, serial ports (2)
NPU Options            None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  PS/2 mouse port             J2       Power LED & keylock        J40

  Serial port 2               J5       Reset switch               J42

  Serial port 1               J6       IDE interface LED          J44

  External battery            J7       Turbo switch               J46

  Floppy drive                J8       Turbo LED                 LED 1
  interface

  Parallel port               J9       32-bit PCI slots        PC1 - PC3

  IDE interface              J10       32-bit VESA Local bus   SL1 & SL2
                                       slots

  Speaker                    J36

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Factory configured - do not             J11             Closed
      alter

  »   Factory configured - do not             J12              Open
      alter

  »   Factory configured - do not             J14              Open
      alter

  »   Factory configured - do not             J15              Open
      alter

  »   Factory configured - do not             J17              Open
      alter

  »   Factory configured - do not             J18              Open
      alter

  »   Factory configured - do not             J22              Open
      alter

  »   Factory configured - do not             J23              Open
      alter

  »   Flash BIOS write protect enabled        J24             Closed

      Flash BIOS write protect                J24              Open
      disabled

  »   Serial port 1 IRQ select IRQ4           J27           pins 1 & 2
                                                              closed

      Serial port 1 IRQ select IRQ3           J27           pins 2 & 3
                                                              closed

  »   Parallel port IRQ select IRQ7           J29           pins 1 & 2
                                                              closed

      Parallel port IRQ select IRQ5           J29           pins 2 & 3
                                                              closed

  »   Serial port 2 IRQ select IRQ3           J30           pins 1 & 2
                                                              closed

      Serial port 2 IRQ select IRQ4           J30           pins 2 & 3
                                                              closed

  »   Onboard mouse IRQ12 enabled             J31           pins 1 & 2
                                                              closed

      Bus mouse IRQ12 enabled                 J31           pins 2 & 3
                                                              closed

  »   CMOS memory normal operation            J35           pins 1 & 2
                                                              closed

      CMOS memory clear                       J35           pins 2 & 3
                                                              closed

  »   Factory configured - do not             J45             Closed
      alter

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       2MB        (2) 256K x 36         NONE

       4MB        (2) 512K x 36         NONE

       4MB        (2) 256K x 36    (2) 256K x 36

       8MB         (2) 1M x 36          NONE

       8MB        (2) 512K x 36    (2) 512K x 36

      10MB        (2) 256K x 36     (2) 1M x 36

      16MB         (2) 2M x 36          NONE

      16MB         (2) 1M x 36      (2) 1M x 36

      32MB         (2) 2M x 36      (2) 2M x 36

      32MB         (2) 4M x 36          NONE

      34MB        (2) 256K x 36     (2) 4M x 36

      40MB         (2) 1M x 36      (2) 4M x 36

      64MB         (2) 8M x 36          NONE

      64MB         (2) 4M x 36      (2) 4M x 36

      128MB        (2) 8M x 36      (2) 8M x 36

            CACHE CONFIGURATION

     Size          Bank 0          TAG

     256KB       (8) 32K x 8   (1) 32K x 8

     512KB       (8) 64K x 8   (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

      Size               J13               J16                 J20

      256KB           pins 1 & 2        pins 2 & 3      pins 1 & 2 closed
                       closed             closed

      512KB           pins 2 & 3        pins 1 & 2      pins 2 & 3 closed
                       closed             closed

         CPU SPEED CONFIGURATION

        Speed                J43

  60/66/90i/100iMHz          Open

     50/100iMHz             Closed

                    3.3 VOLT POWER SOURCE CONFIGURATION

        Description                  J19                     J21

  RG 1 regulator not used            Open                   Open

   Single regulator used     pins 1 & 2, 3 & 4, 5    pins 1 & 2, 3 & 4, 5
                                  & 6 closed             & 6 closed

               PARALLEL PORT DMA CONFIGURATION

     DMA channel             J28                  J34

        None                 Open                 Open

        DRQ0           pins 1 & 2 closed   pins 1 & 2 closed

        DRQ1           pins 3 & 4 closed   pins 3 & 4 closed

        DRQ3           pins 5 & 6 closed   pins 5 & 6 closed