     $C9FA/51706:   ?

    Jump from $C976, $C9BC:

    C9FA: AE 79 02  LDX $0279
    C9FD: B5 E2     LDA $E2,X       ; drive number
    C9FF: 29 01     AND #$01
    CA01: 85 7F     STA $7F         ; save
    CA03: AD 85 FE  LDA $FE85       ; 18, directory track
    CA06: 85 80     STA $80         ; save
    CA08: B5 D8     LDA $D8,X       ; directory sector
    CA0A: 85 81     STA $81
    CA0C: 20 75 D4  JSR $D475       ; read block
    CA0F: AE 79 02  LDX $0279
    CA12: B5 DD     LDA $DD,X       ; pointer in block
    CA14: 20 C8 D4  JSR $D4C8       ; set buffer pointer
    CA17: AE 79 02  LDX $0279
    CA1A: B5 E7     LDA $E7,X       ; file type
    CA1C: 29 07     AND #$07        ; isolate
    CA1E: 8D 4A 02  STA $024A       ; and save
    CA21: A9 00     LDA #$00
    CA23: 8D 58 02  STA $0258
    CA26: 20 A0 D9  JSR $D9A0       ; get parameters for rel-file
    CA29: A0 01     LDY #$01
    CA2B: 20 25 D1  JSR $D125       ; get file type
    CA2E: F0 01     BEQ $CA31       ; rel-file?
    CA30: C8        INY

    Jump from $CA2E:

    CA31: 98        TYA
    CA32: 4C C8 D4  JMP $D4C8       ; set buffer pointer

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