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CR80 Hard and Floppy Disks

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artifacts from Datamuseum.dk's BitArchive.

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⟦e73da0e9e⟧ TextFile

    Length: 876 (0x36c)
    Types: TextFile
    Names: »LTU.TD«

Derivation

└─⟦b8af24a88⟧ Bits:30005796 CR80 Disc Pack ( MINICAMPS )
    └─ ⟦this⟧ »LTU.D!LTU.TD«

TextFile

    XTR  R1    6          ; TX LTU
    JMP        B8
B9: ADDC #40  R1          ; NEXT CH#
B8: MOV  R5   R0          ; ISOLER DATA#
    XTR  R0    2          ; FROM REG 5
    MOV  R1   R3          ; ISOLATE CH#
    SRL  R3    6          ; AND SHIFT
    SLL  R3    2          ; CH# TO BIT 2-3
    ADD  R0   R3          ; ADD CH X4 +DATA#
    ADDC #20  R3          ; BASE REL. #20 - #2F
    MOD8 #02              ;
    SIO  R0   R1          ; GET STATUS
    SBZ  R0    5          ; IF ERROR ON CHR TIME
    JMPI S6   ERR         ; THEN JUMP TO ERROR
    SBN  R0    4
    JMP       B10
    MOD8 #08
    CIO  X3   R1          ; TXDATA
    MOVC #00  R0
    MOV  R0   X3          ; CLEAR DATA BUFF.
    MOV  R5   R0          ; INCREMENT
    XTR  R0    2          ;
    SRL  R5    2
    SLL  R5    2
    ADD  R0   R5
B10:SLC  R5    2          ; REG 5 DKIFTES CYCLIC
    SOB  R0    B9