glm94/pdp7-unix
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Added some code to print out ASCIi characters in each word.

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This commit is contained in:
Warren Toomey
2016-03-24 17:50:47 +10:00
parent b234e2ad81
commit 9f30359c56
1 changed files with 34 additions and 21 deletions
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tools/sdump
+26 -13
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@@ -12,38 +12,51 @@ use Fcntl qw(:flock SEEK_SET);
### return -1 on EOF ### return -1 on EOF
sub read_word { sub read_word {
my $F = shift; my $F = shift;
# Convert four bytes into one 18-bit word # Convert four bytes into one 18-bit word
return -1 if ( read( $F, my $four, 4 ) != 4 ); # Not enough bytes read return -1 if ( read( $F, my $four, 4 ) != 4 ); # Not enough bytes read
my ( $b1, $b2, $b3, $b4 ) = unpack( "CCCC", $four ); my ( $b1, $b2, $b3, $b4 ) = unpack( "CCCC", $four );
return (($b1 & 0xff) | return (
(($b2 & 0xff) << 8 ) | ( $b1 & 0xff ) | ( ( $b2 & 0xff ) << 8 ) | ( ( $b3 & 0xff ) << 16 ) |
(($b3 & 0xff) << 16) | ( ( $b4 & 0xff ) << 24 ) );
(($b4 & 0xff) << 24));
} }
### Main program ### Main program
die("Usage: $0 imagefile\n") if (@ARGV!=1); die("Usage: $0 imagefile\n") if ( @ARGV != 1 );
open(my $IN, "<", $ARGV[0]) || die("Couldn't open $ARGV[0]: $!\n"); open( my $IN, "<", $ARGV[0] ) || die("Couldn't open $ARGV[0]: $!\n");
use constant NUMBLOCKS => 8000; # Number of blocks on a surface use constant NUMBLOCKS => 8000; # Number of blocks on a surface
use constant WORDSPERBLK => 64; # 64 words per block use constant WORDSPERBLK => 64; # 64 words per block
use constant BYTESPERWORD => 4; # We encode each word into 4 bytes use constant BYTESPERWORD => 4; # We encode each word into 4 bytes
# Skip the first surface # Skip the first surface
seek($IN, NUMBLOCKS*WORDSPERBLK*BYTESPERWORD, SEEK_SET) || seek( $IN, NUMBLOCKS * WORDSPERBLK * BYTESPERWORD, SEEK_SET )
die("Cannot seek: $!\n"); || die("Cannot seek: $!\n");
foreach my $blocknum ( 0 .. NUMBLOCKS*2 - 1 ) { foreach my $blocknum ( 0 .. NUMBLOCKS * 2 - 1 ) {
printf("Block %d (%06o)\n", $blocknum, $blocknum ); printf( "Block %d (%06o)\n", $blocknum, $blocknum );
foreach my $line ( 0 .. 7 ) { foreach my $line ( 0 .. 7 ) {
# Print out the words in octal # Print out the words in octal
my @buf;
foreach my $offset ( 0 .. 7 ) { foreach my $offset ( 0 .. 7 ) {
# Get a word # Get a word
my $word= read_word($IN); my $word = read_word($IN);
exit(0) if ($word==-1); exit(0) if ( $word == -1 );
printf("%06o ", $word); $buf[$offset] = $word;
}
foreach my $offset ( 0 .. 7 ) {
printf( "%06o ", $buf[$offset] );
}
print(" ");
foreach my $offset ( 0 .. 7 ) {
my $c1 = ( $buf[$offset] >> 9 ) & 0777;
$c1 = ( ( $c1 >= 32 ) && ( $c1 <= 126 ) ) ? chr($c1) : ' ';
my $c2 = $buf[$offset] & 0777;
$c2 = ( ( $c2 >= 32 ) && ( $c2 <= 126 ) ) ? chr($c2) : ' ';
print("$c1$c2");
} }
print("\n"); print("\n");
} }