IBM CORPORATION

PC300 (TYPE 6272, 6282)

Device Type         Mainboard
Processor           Pentium
Processor Speed     75/90/100/120/133/150/166/200/233MHz
Chip Set            Unidentified
Video Chip Set      Unidentified
Maximum Onboard     128MB (EDO & SDRAM supported)
Memory
Maximum Video       Unidentified
Memory
Cache               256/512KB
BIOS                Unidentified
Dimensions          330mm x 218mm
I/O Options         Ethernet 10BaseT connector, AUI connector, floppy drive
                    interface, IDE interfaces (2), parallel port, PS/2
                    mouse port, serial ports (2), VGA feature connector,
                    VGA port, riser slot, cache slot, USB connectors (2)
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  5v power                    C1       Serial port 2              CN8

  5v auxiliary power          C2       AUI connector              CN9

  LAN LED                     C4       Floppy drive               CN10
                                       interface

  Chassis fan power           C5       IDE interface 1            CN11

  3.3v power                  C6       IDE interface 2            CN12

  VGA port                   CN1       VGA feature connector      CN13

  Parallel port              CN2       Power switch                J7
                                       connector

  USB connector 2            CN3       Power LED/IDE               J8
                                       interface LED

  USB connector 1            CN4       Wake on modem              J27
                                       connector

  PS/2 mouse port            CN5       Wake on LAN connector      J28

  Serial port 1              CN6       Riser slot                 SL1

  Ethernet 10BaseT           CN7       Cache slot                 SL2
  connector

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

  »   CMOS memory normal operation             J6           Pins 1 & 2
                                                              closed

      CMOS memory clear                        J6           Pins 2 & 3
                                                              closed

  »   Factory configured - do not alter      SW1/5             Off

  »   Floppy drive normal operation          SW1/6             Off

      Floppy drive read only                 SW1/6              On

                  DIMM CONFIGURATION

       Size            Bank 0            Bank 1

       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

       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: Board accepts EDO & SDRAM memory.

                CACHE CONFIGURATION

           Size                      SL2

          256KB            256KB module installed

          512KB            512KB module installed

                   VIDEO MEMORY CONFIGURATION

  Note: The size location of the video memory is unidentified.

                            CPU SPEED SELECTION

    CPU       Clock    Multiplier     SW1/1    SW1/2     SW1/3     SW1/4
   speed     speed

   75MHz     50MHz        1.5x         Off      Off       On        On

   90MHz     60MHz        1.5x         Off      Off       On        Off

  100MHz     66MHz        1.5x         Off      Off       Off       On

  120MHz     60MHz         2x          On       Off       On        Off

  133MHz     66MHz         2x          On       Off       Off       On

  150MHz     60MHz        2.5x         On        On       On        Off

  166MHz     66MHz        2.5x         On        On       Off       On

  200MHz     66MHz         3x          Off       On       Off       On

  233MHz     66MHz        3.5x         Off      Off       Off       On