Silicon Valley Computer ADP-20/20F ATA Host Adapter
  • P1: Hard Drive LED
  • P2: Hard Drive Connector
  • P3: Floppy Connector (20F only)
    • Default settings are in Bold or are selected by a .
    E1/E4: Floppy Support (20F only)
  • Both jumpers are hard-wired on the back of the printed circuit board. To
  • disable floppy support, the copper traces must be cut (voids the warranty!).

    • E2: Floppy Precompensation (20F only)

  • Jumpered for 125ns PreComp.
  • Open for 105ns PreComp.

    • E3: Floppy Speed Support (20F only)

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

    • E5: Hard Drive Support

  • This jumper is hard-wired on the back of the printed circuit board. To
  • disable hard drive support, the copper trace must be cut (voids the warranty!).

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