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CR80 Hard and Floppy Disks

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artifacts from Datamuseum.dk's BitArchive.

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⟦80fcda475⟧ TextFile

    Length: 1296 (0x510)
    Types: TextFile
    Names: »MS2030.S«, »~ORPHAN_0x0036«

Derivation

└─⟦93791531c⟧ Bits:30005105 8" CR80 Floppy CR80FD_0064 ( VOL:SCC.V MSS Directory: MS1.D )
    └─⟦185cc4db7⟧ 
        └─ ⟦this⟧ »~ORPHAN_0x0036« 
└─⟦b5acf5c79⟧ Bits:30005104 8" CR80 Floppy CR80FD_0063 ( VOL: SCC.V MSS Directory: MS2.D )
    └─⟦f918199fd⟧ 
        └─ ⟦this⟧ »MS2.D!MS2030.S« 

TextFile

MESSAGE <:MS2030.S V810303:>
;-----------------------------------------------------------------------
; SUBROUTINE MS2030
; WRITE NEXT ANO.
;
; REGISTERS          CALL               EXIT
; R0                 ANO                -   
; R4                 LINK               DEST
; R6                 REF(IOCB)          REF(IOCB)
; R1,R2,R7           -                  DEST
; R3,R5              -                  UNCH
;
; INPUT:   IOCB DATA
; OUTPUT:  IOCB DATA
; EXIT TO: LINK+0    (OK)
;-----------------------------------------------------------------------
MS2030:                             ; WRITE NEXT ANO:
        MOV          R4  RL2000     ;   SAVE RETURN LINK
        MOV   IOBNX. X6         R4  ;   GET BUFFER INDEX
        SRL          R4  1          ;   CALCULATE WORD INDEX
        ADD   IOBUF. X6         R4  ;   CALCULATE WORD ADDRESS
        MOV          R0         X4  ;   WRITE ANO IN BUFFER
        INC   IOBNX .X6             ;   INCREMENT BUFFER INDEX
        INC   IOBNX. X6             ;   TWICE SINCE 2 BYTES WRITTEN
        MOV   IOBLT. X6         R1  ;   GET BLOCK LENGTH
        MOD   IOBNX. X6             ;   IF BLOCK FULL
        IEQ          R1  0          ;
        JMPI         S4  MI1010     ;   THEN WRITE BLOCK
        JMPI             RL2000     ;   RETURN