     $F9D9/63961:   ?

    Jump from $F9D4:

    F9D9: C6 48     DEC $48
    F9DB: D0 1D     BNE $F9FA
    F9DD: 98        TYA
    F9DE: 10 04     BPL $F9E4
    F9E0: 29 7F     AND #$7F
    F9E2: 85 20     STA $20

    Jump from $F9DE:

    F9E4: 29 10     AND #$10
    F9E6: F0 12     BEQ $F9FA
    F9E8: AD 00 1C  LDA $1C00
    F9EB: 29 FB     AND #$FB        ; drive motor off
    F9ED: 8D 00 1C  STA $1C00
    F9F0: A9 FF     LDA #$FF
    F9F2: 85 3E     STA $3E
    F9F4: A9 00     LDA #$00
    F9F6: 85 20     STA $20
    F9F8: F0 DC     BEQ $F9D6

    Jump from $F9DB, $F9E6:

    F9FA: 98        TYA
    F9FB: 29 40     AND #$40
    F9FD: D0 03     BNE $FA02
    F9FF: 4C BE FA  JMP $FABE

    Jump from $F9FD:

    FA02: 6C 62 00  JMP ($0062)

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