MYLEX CORPORATION

MNE486 System Board

Processor         80486DX
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          Intel
Max. Onboard DRAM 32MB
Cache             128KB
BIOS              Mylex
Dimensions        330mm x 218mm
I/O Options       Bus mouse, floppy drive interface, IDE interface, serial
                  port, parallel port
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Speaker                     P11      Serial port                 P20

  Power LED & keylock         P12      Parallel port               P21

  Turbo LED                   P13      Bus mouse                   P22

  Reset switch                P14      IDE interface               P23

  Floppy drive interface      P18      IDE interface LED           P24

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   External SRAM cache enabled              J1            pins 1 & 2
                                                              closed

      External SRAM cache disabled             J1              Open

  »   Factory configured - do not alter        J2               N/A

  »   Factory configured - do not alter        J13              N/A

  »   Factory configured - do not alter        J14              N/A

  »   Factory configured - do not alter        J15              N/A

  »   Factory configured - do not alter        J16              N/A

  »   Serial port 1 select COM1                J17           pins 1 & 2
      interrupt IRQ4 at 3F8-3FF                               closed

      Serial port 1 select COM2                J17           pins 2 & 3
      interrupt IRQ3 at 2F8-2FF                               closed

  »   Parallel port select LPT1                J18           pins 1 & 2
      interrupt IRQ7 at 378-37F                               closed

      Parallel port select LPT2                J18           pins 2 & 3
      interrupt IRQ5 at 278-27F                               closed

  »   On-board interface ports enabled         J19           pins 1 & 2
                                                              closed

      On-board interface ports disabled        J19           pins 2 & 3
                                                              closed

  »   IDE factory diagnostics disabled         J20           pins 1 & 2
                                                              closed

      IDE factory diagnostics enabled          J20             Open

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      32MB        (4) 4M x 9      (4) 4M x 9

                         DRAM JUMPER CONFIGURATION

  Size    J3     J4     J5     J6     J7     J8   J9     J10   J11   J12

  1MB    Open   Open   Open   Open    Open   2    Open   1 &   1 &    1 &
                                             &           2      2     2
                                             3

  2MB     1 &    1 &    1 &    1 &    Open   1    Open   1 &   1 &    2 &
          2      2      2      2             &           2      2     3
                                             2

  4MB    Open   Open   Open   Open    Open   1    2 &    1 &   1 &    2 &
                                             &     3     2      2     3
                                             2

  8MB     1 &    1 &    1 &    1 &    Open   1    1 &    2 &   1 &    2 &
          2      2      2      2             &     2     3      2     3
                                             2

  16MB   Open   Open   Open   Open    2 &    1    1 &    2 &   1 &    2 &
                                       3     &     2     3      2     3
                                             2

  32MB    1 &    1 &    1 &    1 &    1 &    1    1 &    2 &   2 &    2 &
          2      2      2      2       2     &     2     3      3     3
                                             2

  Note: Pins designated should be in the closed position.