╔═══════════════════════════════════════════════════════════════════════╗
    ║  Silicon Valley Computers, Inc.                          ADP-20       ║
    ╠═══════════════════════════════════════════════════════════════════════╣
    ║                                                                       ║
    ║                                                                       ║
    ║                                                            ╔═══       ║
    ║                                                            ║          ║
    ║  P1: HD LED (4 pins)               P1  P2     P3           ║          ║
    ║  P2: Hard Drive (40 pins)        ┌────────────────────────┐║          ║
    ║  P3: Floppy Drive (34 pins)      │....                    │║          ║
    ║                                  │1:::::::: 1::::::       │║          ║
    ║                                  │                        │║          ║
    ║                                  │           1:::5        │║          ║
    ║                                  │       ┌┐            ┌──┘║          ║
    ║                                  └───────┘└────────────┘   ║          ║
    ║                                              E1-E5                    ║
    ║  INTERFACE:  ISA(AT)->IDE(AT)                                         ║
    ║  CONTROLS:   2 Floppy Drives (360KB, 720KB, 1.2MB, 1.44MB)            ║
    ║              2 IDE Hard Drives                                        ║
    ║                                                                       ║
    ║                                                                       ║
    ║  E1,E4: Floppy Drive Enable:  Both jumpers are hardwired on the back  ║
    ║                               of the pcboard.  To disable the floppy, ║
    ║                               the traces must be cut (voids the       ║
    ║                               warranty).  To re-enable floppy support,║
    ║                               E1 & E4 must be jumpered.               ║
    ║                                                                       ║
    ║  E2: Floppy Precompensation                                           ║
    ║      125ns: E2 Jumpered                                               ║
    ║     *105ns: (no Jumper)                 *(Factory Default)            ║
    ║                                                                       ║
    ║  E3: Dual Speed Floppy Support                                        ║
    ║      Dual Speed Floppy: E3 Jumpered                                   ║
    ║     *Single Speed Floppy: (no Jumper)                                 ║
    ║                                                                       ║
    ║  E5: Hard Drive Support:  This jumper is hard-wired on the back of    ║
    ║                           the pcboard.  To disable the hard drive,    ║
    ║                           the trace must be cut (this voids the Mfr.  ║
    ║                           warranty).  To re-enable hard drive support,║
    ║                           E5 must be jumpered.                        ║
    ║                                                                       ║
    ╟──────────────────────────────┐ NOTES ┌────────────────────────────────╢
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    ╚═══════════════════════════════════════════════════════════════════════╝