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Python module to read .tap images
Posted: Wed Sep 23, 2020 2:18 am
by srowe
I've been getting to grips with the details of the Commodore tape format and have created a Python module that can extract files from .tap files
https://pypi.org/project/tapfile/
Combined with the d64 module I wrote a while ago this script can then be used to create a disk image from a tap file
Code: Select all
import struct
import sys
from d64 import DiskImage
from tap_file import TapFile, TapHeader, HeaderType
tape_image = TapFile(sys.argv[1])
with DiskImage(sys.argv[2], 'w') as disk_image:
for obj in tape_image.contents():
if isinstance(obj, TapHeader):
if obj.htype in (HeaderType.PRG_RELOC, HeaderType.PRG):
print("Copying PRG file", obj.name)
out_file = disk_image.path(obj.name).open('w', ftype='PRG')
out_file.write(struct.pack('<H', obj.start))
elif obj.htype == HeaderType.SEQ_HDR:
print("Copying SEQ file", obj.name)
out_file = disk_image.path(obj.name).open('w', ftype='SEQ')
elif obj.htype == HeaderType.SEQ_DATA:
out_file.write(obj.data)
if obj.seq_eof:
out_file.close()
else:
# PRG contents
out_file.write(obj.data)
out_file.close()
Re: Python module to read .tap images
Posted: Sat Feb 25, 2023 5:13 am
by raspberrypioneer
Thank you very much for your tap file converter! I found it useful in converting some Vic-20 tap files to working D64 / PRG format programs.
I had to do a few things to get it up and running on Windows using VS Code with Python 3.11:
pip install tapfile
pip install d64
Amend the file open command in a few of the routines e.g. in magic.py
#with filepath.open('rb') as fileh:
with open(filepath,'rb') as fileh:
Create the empty d64 file using Dirmaster first, then run the converter program
Re: Python module to read .tap images
Posted: Sat Feb 25, 2023 7:02 am
by srowe
Looks like you were trying to use a string rather than a
pathlib.Path object? Could you give the full code example?
You might find cbm-shell useful, rather than using these modules directly.
https://cbmshell.readthedocs.io/en/latest/index.html
You can do a move from .tap to .d64 with just
Code: Select all
(cbm) attach ref.tap
Attached ref.tap to 0
(cbm) attach test.d64
Attached test.d64 to 1
(cbm) copy 0:TEST 1:
Copying ImagePath(0:b'TEST') to ImagePath(1:b'TEST')
(cbm)
Re: Python module to read .tap images
Posted: Sat Feb 25, 2023 8:43 am
by raspberrypioneer
Suspect it was that, I used file names as strings, although I did try passing file names as arguments at one point. This is the code I used, basically tweaking your version using file names in strings (ok for the one-off things I'm doing):
Code: Select all
import struct
#import sys
from d64 import DiskImage
from tap_file import TapFileReader, TapHeader, HeaderType
tap_file_name = "C:/test/Mickey the Bricky.tap"
# Create the empty d64 file using dirmaster first
d64_file_name = "C:/test/Mickey the Bricky.d64"
# tape_image = TapFileReader(sys.argv[1])
# with DiskImage(sys.argv[2], 'w') as disk_image:
tape_image = TapFileReader(tap_file_name)
with DiskImage(d64_file_name, 'w') as disk_image:
for obj in tape_image.contents():
if isinstance(obj, TapHeader):
if obj.htype in (HeaderType.PRG_RELOC, HeaderType.PRG):
print("Copying PRG file", obj.name)
out_file = disk_image.path(obj.name).open('w', ftype='PRG')
out_file.write(struct.pack('<H', obj.start))
elif obj.htype == HeaderType.SEQ:
print("Copying SEQ file", obj.name)
out_file = disk_image.path(obj.name).open('w', ftype='SEQ')
else:
# PRG or SEQ data
out_file.write(obj.data)
if obj.eof:
out_file.close()
Thanks again, got the result in the end with this and a working game (I've just extracted the PRG from the D64 as that's all I need in this case). Will check out cbm-shell though, looks much easier.
