class D64_Description(DiskDescription):
"""Describe the 1541 disk geometry and related CBM-DOS version."""
_SECTOR_COUNTS = (
# (starting track, ending track, sectors in this track group)
(0, 0, 0),
(1, 17, 21),
(18, 24, 19),
(25, 30, 18),
(31, 35, 17))
DIRECTORY_HEADER = (18, 0)
DIRECTORY_ENTRIES = (18, 1)
STRUCT_HEADER = struct_doc('''
< # Little-endian
xx # Track/sector of first directory block; should always be 18/1 for normal disks
x # 'A' (representing "4040 format".)
x # 0 ("Null flag for future DOS use.")
140x # Block Allocation Map (BAM)
16s # Disk name, PET-ASCII, $A0 padded
xx # Two shift-spaces
2s # Disk ID
x # $A0
xx # '2A' (DOS version and format type.)
xxxx # Shifted spaces ($A0)
85x # Rest of sector is unused.
''')
class D81_Description(DiskDescription):
"""Describe the 1541 disk geometry and related CBM-DOS version."""
_SECTOR_COUNTS = (
# (starting track, ending track, sectors in this track group)
(0, 0, 0),
(1, 80, 40))
DIRECTORY_HEADER = (40, 0)
DIRECTORY_ENTRIES = (40, 3)
STRUCT_HEADER = struct_doc('''
< # Little-endian
xx # Track/sector of first directory block; 40/3 for normal disks
x # 'D' (representing "4040 format".)
x # 0 Null byte.
16s # Disk name, PET-ASCII, $A0 padded
xx # Two shift-spaces
2s # Disk ID
x # $A0
xx # '3D' (DOS version and format type.)
xx # Shifted spaces ($A0)
227x # Rest of sector is unused.
''')
"""This module provides support for reading "T64" tape images."""
from __future__ import with_statement
import struct
from c64 import struct_doc, blocks
class FileNotFoundError(Exception): pass
class FormatError(Exception): pass
TAPE_HEADER = struct_doc('''
< # Little-endian
xx # Tape version, unused
H # Max no. of directory entries
xx # Used directory entries; non-normative
xx # Unused
24s # Tape name
''')
TAPE_ENTRY = struct_doc('''
< # Little-endian
b # C64s filetype
b # CBM-DOS filetype
H # Start address
H # End address
xx # Unused
L # Byte-offset of start of file
xxxx # unused
16s # Filename, PET-ASCII, $20 padded
''')
9 - Printer Driver
10 - Input Driver
75-88: If a document, the name of the application that created it.
89-9F: Available for applications, unreserved.
A0-FF: Description (terminated with a $00)
"""
_STRUCT_GEOS_INFO_BLOCK = struct_doc('''
< # Little-endian
xx # $00,$FF (no next sector, all bytes in this sector are valid data.)
xxx # ID bytes ($03 $15 $BF)
63b # Icon bitmap in sprite format
b # C64 filetype (same as in directory entry)
b # GEOS filtetype (same as in directory entry)
b # GEOS file structure (same as in directory entry)
H # Program load address
H # Program end address (for accessories)
H # Program start address
20s # Class text
20s # Author
20s # Document Application
20b # Application specific
96s # Description
''')
BYTES_PER_SECTOR = 256
class DiskDescription(object):
def __init__(self):
self.sectors_per_track = _make_sector_table(self._SECTOR_COUNTS)
9 - Printer Driver
10 - Input Driver
75-88: If a document, the name of the application that created it.
89-9F: Available for applications, unreserved.
A0-FF: Description (terminated with a $00)
"""
_STRUCT_GEOS_INFO_BLOCK = struct_doc('''
< # Little-endian
xx # $00,$FF (no next sector, all bytes in this sector are valid data.)
xxx # ID bytes ($03 $15 $BF)
63b # Icon bitmap in sprite format
b # C64 filetype (same as in directory entry)
b # GEOS filtetype (same as in directory entry)
b # GEOS file structure (same as in directory entry)
H # Program load address
H # Program end address (for accessories)
H # Program start address
20s # Class text
20s # Author
20s # Document Application
20b # Application specific
96s # Description
''')
BYTES_PER_SECTOR = 256
class DiskDescription(object):
def __init__(self):
self.sectors_per_track = _make_sector_table(self._SECTOR_COUNTS)
import struct
from c64 import struct_doc, blocks
class FileNotFoundError(Exception):
pass
class FormatError(Exception):
pass
TAPE_HEADER = struct_doc('''
< # Little-endian
xx # Tape version, unused
H # Max no. of directory entries
xx # Used directory entries; non-normative
xx # Unused
24s # Tape name
''')
TAPE_ENTRY = struct_doc('''
< # Little-endian
b # C64s filetype
b # CBM-DOS filetype
H # Start address
H # End address
xx # Unused
L # Byte-offset of start of file
xxxx # unused
16s # Filename, PET-ASCII, $20 padded
''')
