DataMuseum.dk

Presents historical artifacts from the history of:

Rational R1000/400 DFS Tapes

This is an automatic "excavation" of a thematic subset of
artifacts from Datamuseum.dk's BitArchive.

See our Wiki for more about Rational R1000/400 DFS Tapes

Excavated with: AutoArchaeologist - Free & Open Source Software.


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⟦8673e9d04⟧ EM, TextFile

    Length: 1024 (0x400)
    Types: EM, TextFile
    Names: »ECC_INFO.EM«

Derivation

└─⟦b4205821b⟧ Bits:30000743 8mm tape, Rational 1000, DFS, D_12_7_3 SEQ288
    └─ ⟦this⟧ »ECC_INFO.EM« 
└─⟦b434774df⟧ Bits:30000528 8mm tape, Rational 1000, DFS, D_12_6_5
    └─ ⟦this⟧ »ECC_INFO.EM« 
└─⟦bc1274df5⟧ Bits:30000750 8mm tape, Rational 1000, DFS backup from PAM's R1000
    └─ ⟦this⟧ »ECC_INFO.EM« 

TextFile

    xeq val prep_read_reg;
    set ECC_PHY_ADR [xeq val read_b_reg [xeq val reg_to_loop 1D 0A] 0];

    xeq val prep_read_reg;
    set ECC_BAD_BIT [xeq val read_b_reg [xeq val reg_to_loop 1D 0B] 0];

    set BIT_ID,
    [#lt [var ECC_BAD_BIT],40]
      TYPE [dec [var ECC_BAD_BIT]]
    [else]
      [#lt [var ECC_BAD_BIT],80]
        VAL [dec [sub [var ECC_BAD_BIT],40]]
      [else]
        [#lt [var ECC_BAD_BIT],89]
          CHECKBIT [sub [var ECC_BAD_BIT],80]
        [else]
          OLD CHECKBIT CODE OR ILLEGAL BAD BIT CODE
        [end]
      [end]
    [end];

    write THE CORRECTED BIT WAS : [var BIT_ID];
    write AT PHYSICAL ADDRESS =,,
          SET  [#extract [var ECC_PHY_ADR] 18 4],,
          LINE  [#extract [var ECC_PHY_ADR] 0F 9],,
          WORD_OFFS  [#extract [var ECC_PHY_ADR] 20 19];
kill ECC_PHY_ADR;
kill ECC_BAD_BIT;
kill BIT_ID;«nul»