
ABIT COMPUTER CORPORATION

PR5 PCI (REV. 1.0)

Processor            CX M1/AM K5/Pentium
Processor Speed      75/90/100/120/133/150/166/200MHz
Chip Set             Intel
Video Chip Set       None
Maximum Onboard      128MB (EDO supported)
Memory
Maximum Video Memory None
Cache                256/512KB
BIOS                 Award
Dimensions           330mm x 218mm
I/O Options          32-bit PCI slots (3), floppy drive interface, green PC
                     connector, IDE interfaces (2), parallel port, PS/2
                     mouse port, serial ports (2), cache slot, IR
                     connector, USB connector
NPU Options          None

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  Serial port 1             CN1        Reset switch         J6 pins 1 & 2

  Serial port 2             CN2        Green PC connector   J6 pins 6 & 7

  Parallel port             CN3        Turbo LED            J6 pins 8 & 9

  Floppy drive              CN4        Speaker               J6 pins 11 -
  interface                                                      14

  IDE interface 2           CN5        Power LED &           J6 pins 16 -
                                       keylock                   20

  IDE interface 1           CN6        IR connector              JP2

  USB connector             CN7        Chassis fan power         JP9

  PS/2 mouse port           J4         32-bit PCI slots       PC1 - PC3

  IDE interface LED         J5         Cache slot                SL1

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     Factory configured - do not alter       DS8              Off

     CMOS memory normal operation            JP3           Pins 1 & 2
                                                              closed

      CMOS memory clear                       JP3           Pins 2 & 3
                                                              closed

     Flash BIOS voltage select 12v           JP8           Pins 2 & 3
                                                              closed

      Flash BIOS voltage select 5v            JP8           Pins 1 & 2
                                                              closed

                            DRAM CONFIGURATION

          Size                    Bank 0                   Bank 1

           8MB                  (2) 1M x 32                 None

          16MB                  (2) 2M x 32                 None

          16MB                  (2) 1M x 32             (2) 1M x 32

          24MB                  (2) 2M x 32             (2) 1M x 32

          32MB                  (2) 4M x 32                 None

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

          40MB                  (2) 4M x 32             (2) 1M x 32

          48MB                  (2) 4M x 32             (2) 2M x 32

          64MB                  (2) 8M x 32                 None

          64MB                  (2) 4M x 32             (2) 4M x 32

          72MB                  (2) 8M x 32             (2) 1M x 32

          80MB                  (2) 8M x 32             (2) 2M x 32

          96MB                  (2) 8M x 32             (2) 4M x 32

          128MB                 (2) 8M x 32             (2) 8M x 32

            Note: Board accepts EDO memory. Banks are interchangeable. If
            using this configuration, DIMM sockets must be empty.

             DIMM CONFIGURATION

     Size          Bank 2        Bank 3

      8MB        (1) 1M x 64      None

     16MB        (1) 2M x 64      None

     16MB        (1) 1M x 64   (1) 1M x 64

     24MB        (1) 2M x 64   (1) 1M x 64

     32MB        (1) 4M x 64      None

                        DIMM CONFIGURATION (CONT)

          Size                    Bank 2                   Bank 3

          32MB                 (1) 2M x 64              (1) 2M x 64

          40MB                 (1) 4M x 64              (1) 1M x 64

          48MB                 (1) 4M x 64              (1) 2M x 64

          64MB                 (1) 8M x 64                  None

          64MB                 (1) 4M x 64              (1) 4M x 64

          72MB                 (1) 8M x 64              (1) 1M x 64

          80MB                 (1) 8M x 64              (1) 2M x 64

          96MB                 (1) 8M x 64              (1) 4M x 64

          128MB                (1) 8M x 64              (1) 8M x 64

  Note: Banks are interchangeable. If using this configuration, SIMM
  sockets must be empty.

                            CACHE CONFIGURATION

       Size            Bank 0               SL1                 TAG

      256KB         (2) 32K x 32       Not installed        (1) 32K x 8

      512KB         (2) 32K x 32        256KB module        (1) 32K x 8
                                         installed

  CACHE JUMPER CONFIGURATION

     Size            JP1

     256KB           Open

     512KB          Closed

                          CPU SPEED SELECTION (CYRIX)

   CPU     Clock   Multiplier   DS/1   DS/2   DS/3   DS/4   DS/5   DS/6   DS/7
  speed    speed

  120MHz   50MHz       2x       Off     On     On    On     Off    Off    Off

  133MHz   55MHz       2x       Off     On    Off    Off    On     Off    Off

  150MHz   60MHz       2x       Off     On    Off    On     On     Off    Off

  166MHz   66MHz       2x       Off     On     On    Off    On     Off    Off

                           CPU SPEED SELECTION (AMD)

   CPU     Clock   Multiplier   DS/1   DS/2   DS/3   DS/4   DS/5   DS/6   DS/7
  speed    speed

  75MHz    50MHz      1.5x      Off    Off     On    On     Off    Off    Off

  90MHz    60MHz      1.5x      Off    Off    Off    On     On     Off    Off

  100MHz   66MHz      1.5x      Off    Off     On    Off    On     Off    Off

  100MHz   55MHz      1.5x      Off    Off    Off    Off    On     Off    Off

  120MHz   60MHz      1.5x      Off    Off    Off    On     On     Off    Off

  133MHz   66MHz      1.5x      Off    Off     On    Off    On     Off    Off

  150MHz   60MHz       2x       Off     On    Off    On     On     Off    Off

  166MHz   66MHz       2x       Off     On     On    Off    On     Off    Off

                          CPU SPEED SELECTION (INTEL)

   CPU     Clock   Multiplier   DS/1   DS/2   DS/3   DS/4   DS/5   DS/6   DS/7
  speed    speed

  75MHz    50MHz      1.5x      Off    Off     On    On     Off    Off    Off

  90MHz    60MHz      1.5x      Off    Off    Off    On     On     Off    Off

  100MHz   66MHz      1.5x      Off    Off     On    Off    On     Off    Off

  120MHz   60MHz       2x       Off     On    Off    On     On     Off    Off

  133MHz   66MHz       2x       Off     On     On    Off    On     Off    Off

  150MHz   60MHz      2.5x       On     On    Off    On     On     Off    Off

  166MHz   66MHz      2.5x       On     On     On    Off    On     Off    Off

  200MHz   66MHz       3x        On    Off     On    Off    On     Off    Off

                           CPU VOLTAGE SELECTION

   Voltage     VC/1   VC/2    VC/3    VC/4   VC/5    VC/6   VC/7    VC/8

      2.5v     Off    Off     Off     Off     On     Off    Off      On

      2.7v     Off    Off     Off     On     Off     Off    Off      On

      2.83v    Off    Off     On      Off    Off     Off    Off      On

     3.38v    Off     On     Off     Off    Off     Off    Off      On

      3.52v    On     Off     Off     Off    Off     Off    Off      On

