DOS33-perl/DOS33.pm
2019-01-11 13:30:14 -06:00

487 lines
15 KiB
Perl

#!/usr/bin/perl -w
package DOS33;
use strict;
use DSK;
use Exporter::Auto;
my $debug = 0;
my $min_trk = 0; # Minimum track number
my $max_trk = 34; # Maximum track number
my $min_sec = 0; # Minimum sector number
my $max_sec = 15; # Maximum sector number
my $sec_size = 256; # Sector size
my $vtoc_trk = 0x11; # Default VTOC track
my $vtoc_sec = 0x00; # Default VTOC sector
# DOS 3.3 file types
my %file_types = (
0x00 => ' T', # Unlocked text file
0x01 => ' I', # Unlocked INTBASIC file
0x02 => ' A', # Unlocked Applesoft file
0x04 => ' B', # Unlocked Binary file
0x08 => ' S', # Unlocked Special file
0x10 => ' R', # Unlocked Relocatable file
0x20 => ' A', # Unlocked A file
0x40 => ' B', # Unlocked B file
0x80 => '*T', # Locked text file
0x81 => '*I', # Locked INTBASIC file
0x82 => '*A', # Locked Applesoft file
0x84 => '*B', # Locked Binary file
0x88 => '*S', # Locked Special file
0x90 => '*R', # Locked Relocatable file
0xa0 => '*A', # Locked A file
0xb0 => '*B', # Locked B file
);
#
# Volume Table of Contents (VTOC) Format
#
# 00 Not used
# 01 Track number of first catalog sector
# 02 Sector number of first catalog sector
# 03 Release number of DOS used to INIT this diskette
# 04-05 Not used
# 06 Diskette volume number
# 07-26 Not used
# 27 Maximum number of track/sector list sector (122 for 256 byte sectors)
# 28-2f Not used
# 30 Last track where sectors were allocated
# 31 Direction of track allocation (+1 or -1)
# 32-33 Not used
# 34 Number of tracks per diskette (normally 35)
# 35 Number of sectors per track (13 or 16)
# 36-37 Number of bytes per sector (LO/HI format)
# 38-3b Bit map of free sectors in track 0
# 3c-3f Bit map of free sectors in track 1
# 40-43 Bit map of free sectors in track 2
# ...
# bc-bf Bit map of free sectors in track 33
# c0-c3 Bit map of free sectors in track 34
# c4-cf Bit maps for additional tracks if there are more than 35 tracks per diskette
#
my $vtoc_fmt_tmpl = 'xCCCx2Cx32Cx8CCx2CCva140';
#
# Bit maps of free sectors on a given track
#
# BYTE SECTORS
# 0 FDEC BA98
# 1 7654 3210
# 2 .... .... (not used)
# 3 .... .... (not used)
#
my $bit_map_free_sec_tmpl = 'nx2';
#
#
# Catalog Sector Format
#
# 00 Not used
# 01 Track number of next catalog sector (usually 11 hex)
# 02 Sector number of next catalog sector
# 03-0a Not used
# 0b-2d First file descriptive entry
# 2e-50 Second file descriptive entry
# 51-73 Third file descriptive entry
# 74-96 Fourth file descriptive entry
# 97-b9 Fifth file descriptive entry
# ba-dc Sixth file descriptive entry
# dd-ff Seventh file descriptive entry
#
my $cat_sec_fmt_tmpl = 'xCCx8a35a35a35a35a35a35a35';
#
# File Descriptive Entry Format
#
# 00 Track of first track/sector list sector.
# 01 Sector of first track/sector list sector.
# 02 File type and flags:
# 03-20 File name (30 characters)
# 21-22 Length of file in sectors (LO/HI format).
#
my $file_desc_ent_dmt_tmpl = 'CCCa30C';
#
# Track/Sector ListFormat
#
# 00 Not used
# 01 Track number of next T/S List sector if one was needed or zero if no more T/S List sectors.
# 02 Sector number of next T/S List sector (if present).
# 03-04 Not used
# 05-06 Sector offset in file of the first sector described by this list.
# 07-0b Not used
# 0c-0d Track and sector of first data sector or zeros
# 0e-0f Track and sector of second data sector or zeros
# 10-ff Up to 120 more Track/Sector pairs
#
my $tslist_fmt_tmpl = 'xCCx2vx5a122';
my %dsk = (); # Memory for disk image.
#
# Display a file entry in DOS 3.3 catalog format.
#
sub display_file_entry {
my ($file_type, $filename, $file_length) = @_;
print sprintf("%-2s %03d %s\n", $file_types{$file_type}, $file_length, $filename);
}
# Parse a file entry
sub parse_file_entry {
my ($file_desc_entry) = @_;
my ($first_tslist_trk, $first_tslist_sec, $file_type, $filename, $file_length) = unpack $file_desc_ent_dmt_tmpl, $file_desc_entry;
return if $first_tslist_trk eq '';
return if $first_tslist_trk == 0xff; # Deleted
return if $first_tslist_trk == 0x00; # Never used
$file_length = 0 unless defined $file_length;
if (defined $first_tslist_trk && $first_tslist_trk ne '') {
# Convert Apple ASCII to normal (clear the high bit)
my $fname = '';
my @bytes = unpack "C*", $filename;
foreach my $byte (@bytes) {
$fname .= sprintf("%c", $byte & 0x7f);
}
return $first_tslist_trk, $first_tslist_sec, $file_type, $fname, $file_length;
}
return 0;
}
# Parse a catalog sector
sub parse_cat_sec {
my ($buf) = @_;
my ($trk_num_nxt_cat_sec, $sec_num_nxt_cat_sec, $first_file_desc_ent, $second_file_desc_ent, $third_file_desc_ent, $fourth_file_desc_ent, $fifth_file_desc_ent, $sixth_file_desc_ent, $seventh_file_desc_ent) = unpack $cat_sec_fmt_tmpl, $buf;
my @files = ();
my ($first_tslist_trk, $first_tslist_sec, $file_type, $filename, $file_length);
($first_tslist_trk, $first_tslist_sec, $file_type, $filename, $file_length) = parse_file_entry($first_file_desc_ent);
if (defined $first_tslist_trk && $first_tslist_trk ne '') {
push @files, { 'file_type' => $file_type, 'filename' => $filename, 'file_length' => $file_length, 'trk' => $first_tslist_trk, 'sec' => $first_tslist_sec };
}
($first_tslist_trk, $first_tslist_sec, $file_type, $filename, $file_length) = parse_file_entry($second_file_desc_ent);
if (defined $first_tslist_trk && $first_tslist_trk ne '') {
push @files, { 'file_type' => $file_type, 'filename' => $filename, 'file_length' => $file_length, 'trk' => $first_tslist_trk, 'sec' => $first_tslist_sec };
}
($first_tslist_trk, $first_tslist_sec, $file_type, $filename, $file_length) = parse_file_entry($third_file_desc_ent);
if (defined $first_tslist_trk && $first_tslist_trk ne '') {
push @files, { 'file_type' => $file_type, 'filename' => $filename, 'file_length' => $file_length, 'trk' => $first_tslist_trk, 'sec' => $first_tslist_sec };
}
($first_tslist_trk, $first_tslist_sec, $file_type, $filename, $file_length) = parse_file_entry($fourth_file_desc_ent);
if (defined $first_tslist_trk && $first_tslist_trk ne '') {
push @files, { 'file_type' => $file_type, 'filename' => $filename, 'file_length' => $file_length, 'trk' => $first_tslist_trk, 'sec' => $first_tslist_sec };
}
($first_tslist_trk, $first_tslist_sec, $file_type, $filename, $file_length) = parse_file_entry($fifth_file_desc_ent);
if (defined $first_tslist_trk && $first_tslist_trk ne '') {
push @files, { 'file_type' => $file_type, 'filename' => $filename, 'file_length' => $file_length, 'trk' => $first_tslist_trk, 'sec' => $first_tslist_sec };
}
($first_tslist_trk, $first_tslist_sec, $file_type, $filename, $file_length) = parse_file_entry($sixth_file_desc_ent);
if (defined $first_tslist_trk && $first_tslist_trk ne '') {
push @files, { 'file_type' => $file_type, 'filename' => $filename, 'file_length' => $file_length, 'trk' => $first_tslist_trk, 'sec' => $first_tslist_sec };
}
($first_tslist_trk, $first_tslist_sec, $file_type, $filename, $file_length) = parse_file_entry($seventh_file_desc_ent);
if (defined $first_tslist_trk && $first_tslist_trk ne '') {
push @files, { 'file_type' => $file_type, 'filename' => $filename, 'file_length' => $file_length, 'trk' => $first_tslist_trk, 'sec' => $first_tslist_sec };
}
return $trk_num_nxt_cat_sec, $sec_num_nxt_cat_sec, @files;
}
# Get catalog sector
sub get_cat_sec {
my ($dskfile, $cat_trk, $cat_sec) = @_;
my $buf;
if (rts($dskfile, $cat_trk, $cat_sec, \$buf)) {
return parse_cat_sec($buf);
}
return 0;
}
#
# Display disk catalog
#
sub catalog {
my ($dskfile, $dbg) = @_;
if (defined $dbg && $dbg) {
$debug = 1;
}
my ($trk_num_1st_cat_sec, $sec_num_1st_cat_sec, $rel_num_dos, $dsk_vol_num, $max_tslist_secs, $last_trk_secs_alloc, $dir_trk_alloc, $num_trks_dsk, $bit_map_free_secs) = get_vtoc_sec($dskfile);
if (defined $trk_num_1st_cat_sec && $trk_num_1st_cat_sec ne '') {
print sprintf("DISK VOLUME %d\n\n", $dsk_vol_num);
my ($next_cat_trk, $next_cat_sec) = ($trk_num_1st_cat_sec, $sec_num_1st_cat_sec);
my @files = ();
do {
($next_cat_trk, $next_cat_sec, @files) = get_cat_sec($dskfile, $next_cat_trk, $next_cat_sec);
if (defined $next_cat_trk && $next_cat_trk ne '') {
foreach my $file (@files) {
display_file_entry($file->{'file_type'}, $file->{'filename'}, $file->{'file_length'});
}
}
} while ($next_cat_trk != 0);
} else {
return 0;
}
return 1;
}
#
# Display sector free map
#
sub freemap {
my ($dskfile, $dbg) = @_;
if (defined $dbg && $dbg) {
$debug = 1;
}
my ($trk_num_1st_cat_sec, $sec_num_1st_cat_sec, $rel_num_dos, $dsk_vol_num, $max_tslist_secs, $last_trk_secs_alloc, $dir_trk_alloc, $num_trks_dsk, $num_secs_dsk, $num_bytes_sec, $bit_map_free_secs) = get_vtoc_sec($dskfile);
print " 0123456789abcdef\n";
print " +----------------\n";
my $tmpl = '';
for (my $t = $min_trk; $t <= $max_trk; $t++) {
$tmpl .= $bit_map_free_sec_tmpl;
}
print "tmpl=$tmpl\n" if $debug;
my @flds = unpack $tmpl, $bit_map_free_secs;
for (my $t = $min_trk; $t <= $max_trk; $t++) {
print sprintf("%2d %04x\n", $t, $flds[$t]) if $debug;
print sprintf("%2d %016b\n", $t, $flds[$t]) if $debug;
my $fr = sprintf("%016b", $flds[$t]);
print "fr=$fr\n" if $debug;
my $fm = reverse $fr;
print "fm=$fm\n" if $debug;
$fm =~ s/0/ /g;
$fm =~ s/1/*/g;
print "fm=$fm\n" if $debug;
print sprintf("%2d|%s\n", $t, $fm);
}
#print "bit_map_free_secs=";
#my @bytes = unpack "C*", $bit_map_free_secs;
#foreach my $byte (@bytes) {
# print sprintf("%02x ", $byte);
#}
#print "\n";
}
# Parse a VTOC sector
sub parse_vtoc_sec {
my ($buf) = @_;
my ($trk_num_1st_cat_sec, $sec_num_1st_cat_sec, $rel_num_dos, $dsk_vol_num, $max_tslist_secs, $last_trk_secs_alloc, $dir_trk_alloc, $num_trks_dsk, $num_secs_dsk, $num_bytes_sec, $bit_map_free_secs) = unpack $vtoc_fmt_tmpl, $buf;
if ($debug) {
print sprintf("trk_num_1st_cat_sec=%02x\n", $trk_num_1st_cat_sec);
print sprintf("sec_num_1st_cat_sec=%02x\n", $sec_num_1st_cat_sec);
print sprintf("rel_num_dos=%02x\n", $rel_num_dos);
print sprintf("dsk_vol_num=%02x\n", $dsk_vol_num);
print sprintf("max_tslist_secs=%02x\n", $max_tslist_secs);
print sprintf("last_trk_secs_alloc=%02x\n", $last_trk_secs_alloc);
print sprintf("dir_trk_alloc=%02x\n", $dir_trk_alloc);
print sprintf("num_trks_dsk=%02x\n", $num_trks_dsk);
print sprintf("num_secs_dsk=%02x\n", $num_secs_dsk);
print sprintf("num_bytes_sec=%04x\n", $num_bytes_sec);
print "bit_map_free_secs=";
my @bytes = unpack "C*", $bit_map_free_secs;
foreach my $byte (@bytes) {
print sprintf("%02x ", $byte);
}
print "\n";
}
return $trk_num_1st_cat_sec, $sec_num_1st_cat_sec, $rel_num_dos, $dsk_vol_num, $max_tslist_secs, $last_trk_secs_alloc, $dir_trk_alloc, $num_trks_dsk, $num_secs_dsk, $num_bytes_sec, $bit_map_free_secs;
}
#
# Get VTOC Sector
#
sub get_vtoc_sec {
my ($dskfile) = @_;
my $buf;
if (rts($dskfile, $vtoc_trk, $vtoc_sec, \$buf)) {
dump_sec($buf) if $debug;
return parse_vtoc_sec($buf);
}
return 0;
}
#
# Parse a sector of a track/sector list
#
sub parse_tslist_sec {
my ($buf) = @_;
#dump_sec($buf);
# Track/Sector ListFormat
#
# 00 Not used
# 01 Track number of next T/S List sector if one was needed or zero if no more T/S List sectors.
# 02 Sector number of next T/S List sector (if present).
# 03-04 Not used
# 05-06 Sector offset in file of the first sector described by this list.
# 07-0b Not used
# 0c-0d Track and sector of first data sector or zeros
# 0e-0f Track and sector of second data sector or zeros
# 10-ff Up to 120 more Track/Sector pairs
#
#$tslist_fmt_tmpl = 'xCCx2vx5a122';
my @secs = ();
my ($next_tslist_trk, $next_tslist_sec, $soffset, $tslist) = unpack $tslist_fmt_tmpl, $buf;
if ($debug) {
print "tslist=";
my @bytes = unpack "C*", $tslist;
foreach my $byte (@bytes) {
print sprintf("%02x ", $byte);
}
print "\n";
}
my $tmpl = '';
for (my $ts = 0; $ts < 122; $ts++) {
$tmpl .= 'CC';
}
my (@tsl) = unpack $tmpl, $tslist;
for (my $ts = 0; $ts < 122; $ts++) {
my $sec = pop @tsl;
my $trk = pop @tsl;
last unless defined $trk;
last if $trk eq '';
next if $trk == 0 && $sec == 0;
#print "trk=$trk sec=$sec\n";
unshift @secs, { 'trk' => $trk, 'sec' => $sec };
}
return $next_tslist_trk, $next_tslist_sec, @secs;
}
#
# Get a sector of a track/sector list
#
sub get_tslist_sec {
my ($dskfile, $tslist_trk, $tslist_sec) = @_;
my $buf;
if (rts($dskfile, $tslist_trk, $tslist_sec, \$buf)) {
dump_sec($buf) if $debug;
return parse_tslist_sec($buf);
}
return 0;
}
#
# Get a track/sector list
#
sub get_tslist {
my ($dskfile, $tslist_trk, $tslist_sec) = @_;
my ($next_tslist_trk, $next_tslist_sec) = ($tslist_trk, $tslist_sec);
my @secs = ();
do {
($next_tslist_trk, $next_tslist_sec, @secs) = get_tslist_sec($dskfile, $next_tslist_trk, $next_tslist_sec);
if (defined $next_tslist_trk && $next_tslist_trk ne '') {
push @secs, { 'trk' => $next_tslist_trk, 'sec', $next_tslist_sec };
}
} while ($next_tslist_trk != 0);
return @secs;
}
sub find_file {
my ($dskfile, $filename) = @_;
my ($trk_num_1st_cat_sec, $sec_num_1st_cat_sec, $rel_num_dos, $dsk_vol_num, $max_tslist_secs, $last_trk_secs_alloc, $dir_trk_alloc, $num_trks_dsk, $bit_map_free_secs) = get_vtoc_sec($dskfile);
if (defined $trk_num_1st_cat_sec && $trk_num_1st_cat_sec ne '') {
my ($next_cat_trk, $next_cat_sec) = ($trk_num_1st_cat_sec, $sec_num_1st_cat_sec);
my @files = ();
do {
($next_cat_trk, $next_cat_sec, @files) = get_cat_sec($dskfile, $next_cat_trk, $next_cat_sec);
if (defined $next_cat_trk && $next_cat_trk ne '') {
foreach my $file (@files) {
my $fn = $file->{'filename'};
$fn =~ s/\s+$//g;
if ($fn eq $filename) {
#print "trk=$file->{'trk'} sec=$file->{'sec'}\n";
return $file->{'trk'}, $file->{'sec'};
}
}
}
} while ($next_cat_trk != 0);
} else {
return 0;
}
print "File $filename NOT FOUND\n";
return 0;
}
sub read_file {
my ($dskfile, $filename, $mode, $conv, $dbg) = @_;
$mode = '' unless defined $mode;
$conv = 0 unless defined $conv;
if (defined $dbg && $dbg) {
$debug = 1;
}
my ($trk, $sec) = find_file($dskfile, $filename);
if ($trk) {
my $buf;
my @secs = get_tslist($dskfile, $trk, $sec);
foreach my $sec (@secs) {
next if $sec->{'trk'} == 0 && $sec->{'sec'} == 0;
#print "**** trk=$sec->{'trk'} sec=$sec->{'sec'}\n";
if (rts($dskfile, $sec->{'trk'}, $sec->{'sec'}, \$buf)) {
dump_sec($buf) if $debug;
#my @bytes = unpack "C$sec_size", $buf;
my @bytes = unpack "C*", $buf;
foreach my $byte (@bytes) {
# For text file translation.
last if $byte == 0x00 && $mode eq 'T';
# Translate \r to \n
$byte = 0x0a if $byte == 0x8d && $conv;
# Convert Apple II ASCII to standard ASCII (clear high bit)
$byte &= 0x7f if $mode eq 'T';
#print sprintf("%c", $byte & 0x7f);
print sprintf("%c", $byte);
}
}
}
}
}
1;