
J-BOND COMPUTER SYSTEMS CORPORATION

PCI 486

Processor        80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed  25/33/50(internal)/66(internal)MHz
Chip Set         Intel
Max. Onboard DRAM128MB
Cache            64/128/256/512KB
BIOS             Phoenix
Dimensions       330mm x 218mm
I/O Options      32-bit PCI bus slots (3), SCSI interface
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                Location     Purpose                  Location

  Speaker                   J1        IDE interface LED           J9

  Reset switch              J2        SCSI interface              CN1

  Power LED & keylock       J3        32-bit PCI bus slots    P1, P2, P3

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CMOS memory normal operation             J8              Open

      CMOS memory clear                        J8             Closed

     External cache wait state select        J14           pins 2 & 3
      0 wait state                                            closed

      External cache wait state select        J14           pins 1 & 2
      1 wait state                                            closed

     Factory configured - do not             J15              Open
      alter

     Factory configured - do not             J16              Open
      alter

     Factory configured - do not             J17              Open
      alter

     Factory configured - do not             J20              Open
      alter

     Factory configured - do not             J21              Open
      alter

     SCSI terminator term power              J24             Closed
      select internal

      SCSI terminator term power              J24              Open
      select external peripheral

     SCSI IRQ select IRQ11                   J114          pins 2 & 3
                                                              closed

      SCSI IRQ select IRQ9                    J114          pins 1 & 2
                                                              closed

     External cache enabled                  JP17          pins 2 & 3
                                                              closed

      External cache disabled                 JP17          pins 1 & 2
                                                              closed

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       2MB        (2) 256K x 36         NONE

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

       4MB        (2) 512K x 36         NONE

       6MB        (2) 256K x 36    (2) 512K x 36

       6MB        (2) 512K x 36    (2) 256K x 36

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

       8MB         (2) 1M x 36          NONE

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

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

      12MB        (2) 512K x 36     (2) 1M x 36

      12MB         (2) 1M x 36     (2) 512K x 36

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

      16MB         (2) 2M x 36          NONE

      18MB        (2) 256K x 36     (2) 2M x 36

      18MB         (2) 2M x 36     (2) 256K x 36

      20MB        (2) 512K x 36     (2) 2M x 36

      20MB         (2) 2M x 36     (2) 512K x 36

      24MB         (2) 1M x 36      (2) 2M x 36

      24MB         (2) 2M 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

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

      36MB        (2) 512K x 36     (2) 4M x 36

      36MB         (2) 4M x 36     (2) 512K x 36

            DRAM CONFIGURATION (CON'T)

      Size            Bank 0           Bank 1

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

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

      48MB         (2) 2M x 36      (2) 4M x 36

      48MB         (2) 4M x 36      (2) 2M x 36

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

      64MB         (2) 8M x 36          NONE

      66MB        (2) 256K x 36     (2) 8M x 36

      66MB         (2) 8M x 36     (2) 256K x 36

      68MB        (2) 512K x 36     (2) 8M x 36

      68MB         (2) 8M x 36     (2) 512K x 36

      72MB         (2) 1M x 36      (2) 8M x 36

      72MB         (2) 8M x 36      (2) 1M x 36

      80MB         (2) 2M x 36      (2) 8M x 36

      80MB         (2) 8M x 36      (2) 2M x 36

      96MB         (2) 4M x 36      (2) 8M x 36

      96MB         (2) 8M x 36      (2) 4M x 36

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

                            CACHE CONFIGURATION

      Size             Bank 0           Bank 1               TAG

      64KB           (4) 8K x 8       (4) 8K x 8     (1) 32K x 8; (1) 16K
                                                       x 8; (1) 8K x 8

      128KB         (4) 32K x 8          NONE        (1) 32K x 8; (1) 16K
                                                       x 8; (1) 8K x 8

      256KB         (4) 32K x 8      (4) 32K x 8     (1) 32K x 8; (1) 16K
                                                             x 8

      512KB         (4) 128K x 8         NONE            (1) 32K x 8

                     CACHE JUMPER CONFIGURATION

   Size      J5        J6       J7        J11      J18       J19

   64KB     Open      Open     Open      2 & 3    1 & 2     1 & 2

  128KB     Open     Closed    Open      1 & 2    2 & 3     1 & 2

  256KB     Open     Closed    Closed    1 & 2    1 & 2     2 & 3

  512KB     Closed   Closed    Closed    1 & 2    2 & 3     2 & 3

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

     Type          KC1         KC2         KC3         KC4         KC5

    80486SX       Open        Open        Open       Closed       Open

    80487SX       Open       Closed      Closed       Open       Closed

  80486DX/DX2    Closed       Open       Closed       Open       Closed

   Overdrive      Open       Closed      Closed       Open       Closed

                   CPU SPEED CONFIGURATION

      CPU speed              J13                 J103

        25MHz          pins 1 & 2 closed         Open

        33MHz          pins 2 & 3 closed        Closed

       50iMHz          pins 1 & 2 closed         Open

       66iMHz          pins 2 & 3 closed        Closed

                                      PCI MASTER CONFIGURATION

                 Master                           J104                            J105

                 PCI 3                     pins 2 & 3 closed               pins 2 & 3 closed

                  PCI 1                     pins 1 & 2 closed               pins 1 & 2 closed

                                      PCI MASTER CONFIGURATION

                 Master                           J106                            J107

                 SCSI                      pins 2 & 3 closed               pins 2 & 3 closed

                  PCI 2                     pins 1 & 2 closed               pins 1 & 2 closed

                           PCI IRQ CONFIGURATION

  IRQ     J36C/B/A  J39C/B/A   J40C/B/A   J42C/B/A   J43C/B/A   J113C/B/A

  IRQ3    Closed      Open       Open       Open       Open       Open

  IRQ5     Open      Closed      Open       Open       Open       Open

  IRQ10    Open       Open      Closed      Open       Open       Open

  IRQ11    Open       Open       Open      Closed      Open       Open

  IRQ14    Open       Open       Open       Open      Closed      Open

  IRQ15    Open       Open       Open       Open       Open      Closed

