
ATC/UNITRON COMPUTER & COMPUTER PARTS

U6978

Processor             AMD K5/Pentium
Processor Speed       75/90/100MHz
Chip Set              Unidentified
Max. Onboard DRAM     128MB
Cache                 64/256/512/1024KB
BIOS                  Award
Dimensions            330mm x 218mm
I/O Options           32-bit PCI slots (4), green PC connector, floppy
                      drive interface, IDE interfaces (2), parallel port,
                      serial ports (2)
NPU Options           None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Serial port 1               J1       Reset switch                J9

  Serial port 2               J2       IDE interface LED          JP26

  Floppy drive interface      J3       Green PC connector         JP28

  Parallel port               J4       Turbo LED                  JP29

  IDE interface 1             J5       Turbo switch               JP30

  IDE interface 2             J6       Green PC connector         JP31

  Speaker                     J7       32-bit PCI slots         PC1 - PC4

  Power LED & keylock         J8

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

     ECP/EPP signal select DREQ1               JP1          pins 1 & 3
                                                              closed

      ECP/EPP signal select DREQ3               JP1          pins 2 & 4
                                                              closed

     ECP/EPP signal select DACK1               JP2          pins 1 & 4
                                                              closed

      ECP/EPP signal select DACK3               JP2          pins 2 & 5
                                                              closed

     Monitor type select color                 JP3           Closed

      Monitor type select monochrome            JP3            Open

     Factory configured - do not alter         JP4             N/A

     BIOS type select EPROM                    JP6            Open

      BIOS type select 5v flash                 JP6          pins 2 & 3
                                                              closed

      BIOS type select 12v flash                JP6          pins 1 & 2
                                                              closed

     Factory configured - do not alter         JP7             N/A

     CMOS memory normal operation              JP8            Open

      CMOS memory clear                         JP8           Closed

     Factory configured - do not alter        JP11             N/A

     L1 invalidate cycle select master        JP16          pins 2 & 3
      write cycles force invalidation                         closed

      L1 invalidate cycle select every         JP16          pins 1 & 2
      cycle with W/R# force invalidation                      closed

     Pipeline disabled                        JP17          pins 2 & 3
                                                              closed

      Pipeline enabled                         JP17          pins 1 & 2
                                                              closed

     Cache type select write back             JP21          pins 1 & 2
                                                              closed

      Cache type select write through          JP21          pins 2 & 3
                                                              closed

     Turbo enabled                            JP30          pins 1 & 2
                                                              closed

      Turbo disabled                           JP30          pins 2 & 3
                                                              closed

               DRAM CONFIGURATION 1

      Size            Bank 0           Bank 1

       2MB        (2) 256K x 36         NONE

       4MB        (2) 512K x 36         NONE

       8MB         (2) 1M x 36          NONE

      16MB         (2) 2M x 36          NONE

      32MB         (2) 4M x 36          NONE

      64MB         (2) 8M x 36          NONE

      128MB        (2) 16M x 36         NONE

               DRAM CONFIGURATION 2

      Size            Bank 0           Bank 1

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

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

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

               DRAM CONFIGURATION 3

      Size            Bank 0           Bank 1

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

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

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

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

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

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

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

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

                 DRAM JUMPER CONFIGURATION

        Configuration                      JP9

              1                pins 1 & 2 OR 2 & 3 closed

              2                     pins 1 & 2 closed

              3                     pins 2 & 3 closed

              CACHE CONFIGURATION

      Size          Bank 0           TAG

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

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

     512KB        (8) 64K x 8    (1) 16K x 8

      1MB         (8) 128K x 8   (1) 32K x 8

           CACHE JUMPER CONFIGURATION

   Size      JP13     JP14      JP19      JP20

   64KB      Open     Open      Open      Open

  256KB      Open     Open     Closed    Closed

  512KB      Open    Closed    Closed    Closed

   1MB      Closed   Closed    Closed    Closed

                        CACHE VOLTAGE CONFIGURATION

      Voltage             JP15              JP18               JP25

   Mixed voltage       pins 1 & 2         pins 1 & 2        pins 1 & 2
                         closed            closed             closed

       3.3v            pins 2 & 3         pins 2 & 3        pins 2 & 3
                         closed            closed             closed

          CPU TYPE CONFIGURATION

   Type       JP23       JP24      JP27

  AMD K5      Open       Open      Open

  Pentium    Closed     Closed    Closed

   CPU SPEED CONFIGURATION

  Speed      JP10      JP12

  75MHz      Open      Open

  90MHz      Open     Closed

  100MHz    Closed    Closed

     CPU SPEED CONFIGURATION (AMD K5)

        Speed                JP22

         1x           pins 2 & 3 closed

     1.5x/2x/3x       pins 1 & 2 closed

    CPU SPEED CONFIGURATION (PENTIUM)

        Speed                JP22

        1.5x          pins 1 & 2 closed

         2x           pins 2 & 3 closed

                           PCI IDE CONFIGURATION

              Base address                              JP5

                  Enabled                        pins 1 & 2 open

                  Disabled                      pins 1 & 2 closed

                           PCI IDE CONFIGURATION

             1st IDE channel                            JP5

                  Enabled                        pins 3 & 4 open

                  Disabled                      pins 3 & 4 closed

                           PCI IDE CONFIGURATION

             2nd IDE channel                            JP5

                  Enabled                       pins 5 & 6 closed

                  Disabled                       pins 5 & 6 open

                           PCI IDE CONFIGURATION

             External D/FF                              JP5

                  Needed                        pins 9 & 10 open

                Not needed                     pins 9 & 10 closed

