     $E5B4/58804:   Get Character From Keyboard Buffer

    Jump from $E5E7, $F147:

    E5B4: AC 77 02  LDY $0277
    E5B7: A2 00     LDX #$00

    Jump from $E5C2:

    E5B9: BD 78 02  LDA $0278,X
    E5BC: 9D 77 02  STA $0277,X
    E5BF: E8        INX
    E5C0: E4 C6     CPX $C6
    E5C2: D0 F5     BNE $E5B9
    E5C4: C6 C6     DEC $C6
    E5C6: 98        TYA
    E5C7: 58        CLI
    E5C8: 18        CLC
    E5C9: 60        RTS

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