ADAPTEC, INC.

ACB-2002A, ACB-2010A

Data bus:                8-bit, ISA
Size:                    Full-length, full-height card
Hard drives supported:   Two MFM ST506 drives
Floppy drives supported: None

[Image]

                           CONNECTIONS

                  Function                        Location

  20-pin data cable connector-drive 0                J0

  20-pin data cable connector-drive 1                J1

  34-pin control cable connector-hard drive          J2

                  USER CONFIGURABLE SETTINGS - ACB-2002A

                Function
                                             Location
                                                               Setting

  »
      Step Rate is: 13 m

      200 m
                                                AB
                                                               closed


      Step Rate is: 70 m

      3msec with step code 3
                                                AB
                                                                open

  »
      Not used
                                                CD
                                                                open

  »
      Wedge servo enabled
                                                EF
                                                               closed


      Dedicated track servo enabled
                                                EF
                                                                open

  »
      Not used
                                                GH
                                                                open

  »
      Not used
                                                IJ
                                                                open

  »
      Normal operation
                                                KL
                                                                open


      Self diagnotics enabled
                                                KL
                                                               closed

              DRIVE TYPE CONFIGURATION - DRIVE 0 - ACB 2010A

           Type                   CD             EF              MN

  Drive is hard sectored        closed          open           closed
  lomega Beta-5

  Drive is Syquest 312 or        open          closed            N/A
  DMA 360 drive

  Drive is soft sectored         open           open             N/A
  ST506 type

              DRIVE TYPE CONFIGURATION - DRIVE 1 - ACB 2010A

           Type
                                  GH
                                                 IJ
                                                                 QR

  Drive is hard sectored
  lomega Beta-5
                                closed
                                                open
                                                               closed

  Drive is Syquest 312 or
  DMA 360 drive
                                 open
                                               closed
                                                                 N/A

  Drive is soft sectored
  ST506 type
                                 open
                                                open
                                                                 N/A

                      BIOS DRIVE TYPE TABLE ACB-2010A

  Table #    Heads     Cylinders     Capacity    MN-Drive 0   OP-Drive 0

                                                 QR-Drive 1   ST-Drive 1

    0          2          612        10.65MB       closed       closed

    1          2          306         5.32MB       closed        open

    2          4          480        16.71MB        open        closed

    3          4          306        10.65MB        open         open

        MISCELLANEOUS TECHNICAL NOTES

      Jumpers WX, UV, YZ are Not used.

  Jumper EF is Not used on Model ACB-2010A.