Apple-2-Tools/atrcopy
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Added support for double density images with 128 byte boot sectors

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This commit is contained in:
Rob McMullen 2016-02-07 18:21:13 -08:00
parent dd73ec7db4
commit c99f6d38ff
1 changed files with 23 additions and 16 deletions
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39
atrcopy.py
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@ -37,7 +37,7 @@ class AtrHeader(object):
file_format = "ATR"
def __init__(self, bytes=None):
self.size_in_bytes = 0
self.image_size = 0
self.sector_size = 0
self.crc = 0
self.unused = 0
@ -53,7 +53,7 @@ class AtrHeader(object):
values = bytes.view(dtype=self.format)[0]
if values[0] != 0x296:
raise InvalidAtrHeader
self.size_in_bytes = (int(values[3]) * 256 * 256 + int(values[1])) * 16
self.image_size = (int(values[3]) * 256 * 256 + int(values[1])) * 16
self.sector_size = int(values[2])
self.crc = int(values[4])
self.unused = int(values[5])
@ -63,19 +63,26 @@ class AtrHeader(object):
raise InvalidAtrHeader
def __str__(self):
return "%s Disk Image (size=%d (%dx%db), crc=%d flags=%d unused=%d)" % (self.file_format, self.size_in_bytes, self.max_sectors, self.sector_size, self.crc, self.flags, self.unused)
return "%s Disk Image (size=%d (%dx%db), crc=%d flags=%d unused=%d)" % (self.file_format, self.image_size, self.max_sectors, self.sector_size, self.crc, self.flags, self.unused)
def check_size(self, size):
if self.size_in_bytes == 0:
if size == 92160:
self.size_in_bytes = size
self.sector_size = 128
elif size == 184320:
self.size_in_bytes = size
self.sector_size = 256
self.initial_sector_size = self.sector_size
self.num_initial_sectors = 0
self.max_sectors = self.size_in_bytes / self.sector_size
if size == 92160 or size == 92176:
self.image_size = 92160
self.sector_size = 128
self.initial_sector_size = 0
self.num_initial_sectors = 0
elif size == 184320 or size == 184336:
self.image_size = 184320
self.sector_size = 256
self.initial_sector_size = 0
self.num_initial_sectors = 0
elif size == 183936 or size == 183952:
self.image_size = 183936
self.sector_size = 256
self.initial_sector_size = 128
self.num_initial_sectors = 3
initial_bytes = self.initial_sector_size * self.num_initial_sectors
self.max_sectors = ((self.image_size - initial_bytes) / self.sector_size) + self.num_initial_sectors
def sector_is_valid(self, sector):
return sector > 0 and sector <= self.max_sectors
@ -96,7 +103,7 @@ class XfdHeader(AtrHeader):
file_format = "XFD"
def __str__(self):
return "%s Disk Image (size=%d (%dx%db)" % (self.file_format, self.size_in_bytes, self.max_sectors, self.sector_size)
return "%s Disk Image (size=%d (%dx%db)" % (self.file_format, self.image_size, self.max_sectors, self.sector_size)
class AtrDirent(object):
# ATR Dirent structure described at http://atari.kensclassics.org/dos.htm
@ -618,9 +625,9 @@ class AtrDiskImage(object):
return segments
def parse_segments(self):
if self.header.size_in_bytes > 0:
if self.header.image_size > 0:
self.segments.append(self.get_obj_segment(0, 0, 0, self.header.atr_header_offset, self.bytes[0:self.header.atr_header_offset], name="%s Header" % self.header.file_format))
self.segments.append(self.get_raw_sectors_segment(1, self.header.max_sectors, self.header.size_in_bytes, self.bytes[self.header.atr_header_offset:], name="Raw disk sectors"))
self.segments.append(self.get_raw_sectors_segment(1, self.header.max_sectors, self.header.image_size, self.bytes[self.header.atr_header_offset:], name="Raw disk sectors"))
self.segments.extend(self.get_boot_segments())
self.segments.extend(self.get_vtoc_segments())
self.segments.extend(self.get_directory_segments())