132 lines
3.2 KiB
Perl
132 lines
3.2 KiB
Perl
#!/usr/bin/perl -w
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#
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# zap.pl:
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#
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# Utility to edit a DOS 3.3 sector (.DSK or .DO disk image).
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#
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# 20190115 LSH
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#
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use strict;
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use DSK;
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my $debug = 0;
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my $trk = -1;
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my $sec = -1;
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my $dst_trk = -1;
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my $dst_sec = -1;
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my $write = 0;
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my @mods = ();
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while (defined $ARGV[0] && $ARGV[0] =~ /^-/) {
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# Debug
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if ($ARGV[0] eq '-d') {
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$debug = 1;
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shift;
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# Track
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} elsif ($ARGV[0] eq '-t' && defined $ARGV[1] && $ARGV[1] =~ /^\d+$/) {
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$trk = $ARGV[1];
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shift;
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shift;
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# Sector
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} elsif ($ARGV[0] eq '-s' && defined $ARGV[1] && $ARGV[1] =~ /^\d+$/) {
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$sec = $ARGV[1];
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shift;
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shift;
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# Destination track
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} elsif ($ARGV[0] eq '-dt' && defined $ARGV[1] && $ARGV[1] =~ /^\d+$/) {
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$dst_trk = $ARGV[1];
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shift;
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shift;
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# Destination sector
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} elsif ($ARGV[0] eq '-ds' && defined $ARGV[1] && $ARGV[1] =~ /^\d+$/) {
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$dst_sec = $ARGV[1];
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shift;
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shift;
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# Allow modifying data.
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} elsif ($ARGV[0] =~ /^-m([ahA])/ && defined $ARGV[1] && $ARGV[1] ne '') {
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my $typ = $1;
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print "$ARGV[1] typ=$typ\n" if $debug;
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if ($ARGV[1] =~ /^([0-9a-fA-F]+):\s*(.+)$/) {
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print "1=$1 2=$2\n" if $debug;
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push @mods, { 'typ' => $typ, 'addr' => $1, 'vals' => $2 };
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}
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shift;
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shift;
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} elsif ($ARGV[0] eq "-w") {
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$write = 1;
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shift;
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} else {
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die "Unknown command line argument $ARGV[0]\n";
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}
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}
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my $dskfile = shift or die "Must supply .dsk filename\n";
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die "Must supply track number 0-35\n" unless $trk >= 0 && $trk <= 35;
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die "Must supply sector number 0-16\n" unless $sec >= 0 && $sec <= 16;
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$dst_trk = $trk unless $dst_trk >= 0;
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$dst_sec = $sec unless $dst_sec >= 0;
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my $buf;
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if (rts($dskfile, $trk, $sec, \$buf)) {
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# Display the data in the sector.
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dump_sec($buf);
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# Allow modifying data.
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if ($write) {
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print "WRITING $dst_trk $dst_sec\n" if $debug;
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# Unpack the data in the sector.
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my @bytes = unpack "C256", $buf;
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foreach my $mod (@mods) {
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my @mbytes = ();
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if ($mod->{'typ'} eq 'a') {
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print "ASCII vals=$mod->{'vals'}\n" if $debug;
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# Normal ASCII
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@mbytes = map { pack('C', ord($_)) } ($mod->{'vals'} =~ /(.)/g);
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} elsif ($mod->{'typ'} eq 'A') {
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print "HEX vals=$mod->{'vals'}\n" if $debug;
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# Apple II ASCII
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@mbytes = map { pack('C', ord($_) | 0x80) } ($mod->{'vals'} =~ /(.)/g);
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} elsif ($mod->{'typ'} eq 'h') {
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print "A2 ASCII vals=$mod->{'vals'}\n" if $debug;
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# HEX
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@mbytes = map { pack('C', hex(lc($_))) } ($mod->{'vals'} =~ /(..)/g);
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}
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my $addr = hex($mod->{'addr'});
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print "addr=$addr\n" if $debug;
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foreach my $byte (@mbytes) {
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print sprintf("byte=%02x\n", ord($byte)) if $debug;
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$bytes[$addr++] = ord($byte);
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}
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}
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# Re-pack the data in the sector.
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$buf = pack "C*", @bytes;
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# Write the sector.
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if (wts($dskfile, $dst_trk, $dst_sec, $buf)) {
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# Read the sector back in.
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if (rts($dskfile, $dst_trk, $dst_sec, \$buf)) {
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# Display the data in the modified sector.
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dump_sec($buf);
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} else {
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print "Failed final read!\n";
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}
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} else {
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print "Failed write!\n";
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}
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}
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} else {
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print "Failed initial read!\n";
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}
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1;
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