ALPHA DESIGN

WINCHESTER/FLOPPY DISK CONTROLLER

  Data bus:                  16-bit ISA

  Size:                      Three-quarter length, Full-height card

  Hard drive supported:      Two ST506/412 drives

  Floppy drives supported:   360KB, 720KB, 1.2MB, 1.44MB

[Image]

                               CONNECTIONS

                    Function                             Location

  4-pin connector - drive active LED                        J1

  20-pin data cable connector - drive 1                     J2

  20-pin data cable connector - drive 0                     J3

  34-pin control cable connector - hard drive               J4

  34-pin control cable connector - floppy drive             J5

                        USER CONFIGURABLE SETTINGS

               Function                    Location          Setting

  »   Primary address select                 JP1          pins 2 & 3, 5 &
                                                             6 closed

      Alternate address select               JP1          pins 1 & 2, 4 &
                                                             5 closed

  »   Precompensation is 125ns                J6               open

      Precompensation is 187ns                J6              closed

  »   Single speed floppy drive               J7               open
      select

      Dual speed floppy drive select          J7              closed