Last change
on this file since 344 was 203, checked in by gregli@…, 13 years ago |
Reworked the 'skip detecting the slave if there was no master' code to be more complete (includes configurator drives) and to take into account int13h/25h calls. Some of the changes in my last checkin have been rolled back as a result (they are no longer needed). I did take a byte out of RAMVARS, but there was an alignment byte available for the taking. I also added a perl script for padding and adding the checksum byte to a binary image, which can be invoked manually or with 'make checksum'.
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File size:
1.3 KB
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Rev | Line | |
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[203] | 1 | @rem = '--*-Perl-*--
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| 2 | @echo off
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| 3 | perl -x -S %0 %1 %2 %3 %4 %5 %6 %7 %8 %9
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| 4 | goto endofperl
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| 5 | @rem ';
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| 6 | #!perl
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| 7 | #
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| 8 | # Add checksum byte to ROM image
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| 9 | #
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| 10 | # Use a size of 0 to skip this script entirely (file is not modified)
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| 11 | #
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| 12 | # On Windows, this file can be renamed to a batch file and invoked directly (for example, "c:\>checksum file size")
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| 13 | #
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| 14 |
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| 15 | ($ARGV[0] ne "" && $ARGV[1] ne "") || die "usage: checksum filename size\n";
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| 16 |
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| 17 | $desiredSize = int($ARGV[1]);
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| 18 |
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| 19 | if( $desiredSize == 0 )
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| 20 | {
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| 21 | exit( 0 );
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| 22 | }
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| 23 |
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| 24 | open FILE, "+<".$ARGV[0] || die "file not found\n";
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| 25 | binmode FILE;
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| 26 | $cs = 0;
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| 27 | $last = 0;
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| 28 | $bytes = 0;
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| 29 | while( ($n = read( FILE, $d, 1 )) != 0 )
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| 30 | {
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| 31 | $cs = $cs + ord($d);
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| 32 | $cs = $cs % 256;
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| 33 | $bytes = $bytes + 1;
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| 34 | }
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| 35 | $oldBytes = $bytes;
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| 36 |
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| 37 | if( $bytes > $desiredSize - 1 )
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| 38 | {
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| 39 | die "ERROR: image is bigger than ".($desiredSize-1).": $bytes\n";
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| 40 | }
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| 41 |
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| 42 | $fixzero = chr(0);
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| 43 | while( $bytes < $desiredSize - 1 )
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| 44 | {
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| 45 | print FILE $fixzero;
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| 46 | $bytes++;
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| 47 | }
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| 48 |
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| 49 | $fixl = ($cs == 0 ? 0 : 256 - $cs);
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| 50 | $fix = chr($fixl);
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| 51 | print FILE $fix;
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| 52 |
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| 53 | close FILE;
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| 54 |
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| 55 | open FILE, "<".$ARGV[0];
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| 56 | binmode FILE;
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| 57 | $cs = 0;
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| 58 | $newBytes = 0;
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| 59 | while( ($n = read( FILE, $d, 1 )) != 0 )
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| 60 | {
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| 61 | $cs = $cs + ord($d);
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| 62 | $cs = $cs % 256;
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| 63 | $newBytes++;
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| 64 | }
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| 65 | $cs == 0 || die "Checksum verification failed\n";
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| 66 |
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| 67 | print "checksum: ".$ARGV[0].": $oldBytes bytes before, $newBytes bytes after\n";
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| 68 |
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| 69 | __DATA__
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| 70 | :endofperl
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