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james |
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REM > SectorOp |
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REM Disc sector reader and writer |
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REM James Bursa - 14 Jun 2000 |
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ON ERROR ON ERROR OFF: REPORT: PRINT ERL: END |
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REM change these for other FSs |
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describe$ = "ADFS_DescribeDisc" |
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sector_op$ = "ADFS_SectorDiscOp" :REM sometimes <FS>_SectorOp |
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PRINT "SectorOp - disc sector reader and writer"' |
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PRINT "WARNING: This program is potentially dangerous and could" |
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PRINT "cause data loss. If you do not know what you are doing," |
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PRINT "press Escape now."' |
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REPEAT |
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INPUT "Drive number: " drive% |
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IF drive% < 0 OR drive% > 8 THEN PRINT "Drive must be 0-8" |
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UNTIL drive% >= 0 AND drive% <= 8 |
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PROCread_record |
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WHILE 1 |
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PRINT "[R]ead sector, [W]rite sector, or [Q]uit? "; |
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REPEAT |
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i$ = GET$ |
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UNTIL INSTR("rRwWqQ", i$) |
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PRINT i$ |
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CASE i$ OF |
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WHEN "r", "R": |
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PROCread |
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WHEN "w", "W": |
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PROCwrite |
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WHEN "q", "Q": |
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END |
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ENDCASE |
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ENDWHILE |
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END |
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REM-------------------------------------------------------------------------------- |
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DEF PROCread |
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WHILE 1 |
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PRINT "Read sector number (0-" + STR$(sectors% - 1) + ", blank to end): "; |
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INPUT "" sector$ |
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IF sector$ = "" THEN ENDPROC |
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sector% = EVAL(sector$) |
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SYS sector_op$,, 1, drive%<<29 OR sector%, M%, secsize% |
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PROCdump |
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PRINT "Save this sector [y/n]? "; |
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REPEAT |
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i$ = GET$ |
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UNTIL INSTR("yYnN", i$) |
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PRINT i$ |
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IF INSTR("yY", i$) THEN |
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INPUT "Filename: " file$ |
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SYS"OS_File", 10, file$, &ffd,, M%, M% + secsize% |
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ENDIF |
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ENDWHILE |
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ENDPROC |
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REM-------------------------------------------------------------------------------- |
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DEF PROCread_record |
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DIM R% 100 |
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SYS describe$, ":" + STR$drive%, R% |
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big% = (R%?&29 AND 1) = 1 |
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secsize% = 2^R%?00 |
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sectors% = (R%!16 / (secsize% * R%?01 * R%?02)) * R%?01 * R%?02 |
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PRINT " Current disc record contents:" |
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PRINT " Bytes/sector: "; secsize% |
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PRINT " Sectors/head: "; R%?01 |
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PRINT " Heads/track: "; R%?02 |
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PRINT " Tracks/disc: "; (R%!16 / (secsize% * R%?01 * R%?02)) |
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PRINT " LFAU: "; 2^R%?05 |
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PRINT " Zones: "; R%?09 |
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IF big% THEN |
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PRINT " Disc size: &" + STR$~R%!&24 + RIGHT$("00000000" + STR$~R%!16, 8) |
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sectors% = 1 |
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ELSE |
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PRINT " Disc size: "; R%!16 |
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ENDIF |
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DIM M% secsize% |
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ENDPROC |
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REM-------------------------------------------------------------------------------- |
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DEF PROCwrite |
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INPUT "Filename: " file$ |
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SYS"OS_File", 23, file$ TO type%,,,, len% |
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IF type% <> 1 THEN PRINT "Not a file": ENDPROC |
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IF len% <> secsize% THEN PRINT "Not sector sized (should be " + STR$secsize% + " bytes)": ENDPROC |
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SYS"OS_File", 16, file$, M% |
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PROCdump |
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PRINT "Write sector number (0-" + STR$(sectors% - 1) + "): "; |
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INPUT "" sector$ |
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sector% = EVAL(sector$) |
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PRINT "WARNING: about to write sector " + STR$sector% + ", press O to confirm" |
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i$ = GET$ |
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IF INSTR("oO", i$) THEN |
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SYS sector_op$,, 2, drive%<<29 OR sector%, M%, secsize% |
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PRINT "Sector written" |
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ELSE |
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PRINT "Aborted" |
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ENDIF |
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ENDPROC |
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REM-------------------------------------------------------------------------------- |
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DEF PROCdump |
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FOR a% = 0 TO (secsize% - 64) STEP 64 |
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a$ = " " |
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FOR b% = 0 TO 63 |
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c% = M%?(a% + b%) |
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IF c% < 32 OR c% = 127 THEN |
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a$ += "." |
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ELSE |
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a$ += CHR$c% |
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ENDIF |
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NEXT |
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PRINT a$ |
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NEXT |
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ENDPROC |
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