Western Digital WD1003V-MM1/MM2 MFM Controller
  • J1: Floppy Drive Connector (MM2 only)
  • J3: Hard Drive 1 Data Connector
  • J4: Hard Drive 0 Data Connector
  • J5: Hard Drive Control Connector
  • J6: HD Activity Light Connector
    • Default settings are in Bold or are selected by a .
    W1: Hard Drive Parameters W1(1/2): Mode
  • Open for Latched Mode
  • Jumper for Non-Latched Mode
    • W1(3/4): Error Correction Code (ECC)
  • Open for 4-Byte ECC
  • Jumpered is Reserved
    • W1(5/6): Caching
  • Open to Enable
  • Jumpered to Disable
    • W1(7/8): WD1003-WA2/WAH Compatibility for drives with 8 heads or more.
  • Open for Incompatible
  • Jumpered for Compatible

    • W3: Hard Drive I/O Address

  • Open for Primary Address
  • Jumpered for Secondary Address

    • W4: Floppy Drive I/O Address

  • Open for Primary Address
  • Jumpered for Secondary Address

    • W5: Floppy Speed Support

  • Open for Single Speed Only (300 RPM)
  • Jumpered for Dual Speed Support (300/360 RPM)

    • W6: Bracket Grounding Option

  • Open for Non-Grounded Bracket
  • Jumper to Ground the Bracket

    • W1(7/8) addresses a disparity between the MMx and WA2/WAH controller series concerning heads #8-15. When replacing a WA2/WAH series with an MMx series on drives with over 8 physical heads, a jumper is required to maintain compatibility.

    There is no Low Level Formatter routine contained on this card. A third party LLF program is required.

    Do NOT mix single and dual speed floppy drives on the same controller.

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