Western Digital WD1002-WA2 Controller
View of Board Layout.

  • J1: Floppy Drive Connector
  • J3: Hard Drive #1 Data Connector
  • J4: Hard Drive #0 Data Connector
  • J5: Hard Drive Control Connector
  • J6: Hard Drive LED

  • Default settings are in Bold or are selected by a .
    E1-E6: Adapter Address
  • E2/E3, E5/E6: Primary
  • E1/E2, E4/E5: Secondary
  • E7/E8: Undocumented/Reserved: (Must be Jumpered.)

    E9/E10: Grounding

  • Open: No Connection
  • Jumpered: PC Board tied to Frame Ground.
  • E11/E12: Undocumented/Unknown: (Default is Open)
    The WD1002-WA2 was the basis for the highly successful WD1003, and eventual WD1006 lines of ST506/412(MFM) controllers. It requires 3rd party software for Low Level Formatting, since it lacks the routine in ROM. The optimum interleave was 3:1.
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