Apple-2-Tools/wozardry
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Merge branch 'master' of https://github.com/a2-4am/wozardry

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4am 2022-09-14 10:24:10 -04:00
commit 3123a9eb51
1 changed files with 21 additions and 5 deletions
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24
wozardry.py
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@ -230,8 +230,8 @@ class Track:
n += b << bit_index
yield n
def rewind(self, bit_count):
self.bit_index -= 1
def rewind(self, bit_count=1):
self.bit_index -= bit_count
if self.bit_index < 0:
self.bit_index = self.bit_count - 1
self.revolutions -= 1
@ -789,11 +789,27 @@ class WozDiskImage:
i += 1
def seek(self, track_num):
"""returns Track object for the given track, or None if the track is not part of this disk image. track_num can be 0..40 in 0.25 increments (0, 0.25, 0.5, 0.75, 1, &c.)"""
"""returns Track object for the given track, or None if the
track is not part of this disk image. track_num can be 0..40
in 0.25 increments (0, 0.25, 0.5, 0.75, 1, &c.)"""
half_phase = self.track_num_to_half_phase(track_num)
trk_id = self.tmap[half_phase]
if trk_id == 0xFF: return None
if trk_id != 0xFF:
return self.tracks[trk_id]
elif (self.info["version"] >= 3) and (self.flux):
# Empty track or flux track
trk_id = self.flux[half_phase]
if trk_id != 0xFF:
# Flux track
return self.tracks[trk_id]
else:
# Empty flux track AND empty track
# This should not happen
return None
else:
# Empty track
return None
def from_json(self, json_string):
j = json.loads(json_string)