Ipsy Bipsy Spider

Ipsy is a tool for applying IPS (International/Internal Patch System) files. They are typically used for distributing emulator ROM changes as distributing the patched ROM would violate copyright law.

You can install ipsy-0.2 via pypi pip3 install ipsy or via the wheel below.

Fixes

• The IpsRecord class now has utility methods to compress, inflate, and check the address of the last byte touched by the record.
• Method of naming output has been simplified.
• Merging patches now attempts to make simplifications among patches if the destination file is provided.
• RLE compression now correctly sets the size of the record when written to file.
• Basic tests have been added
• Merging now preserves the RLE compression of a patch.
• Various other small bug fixes.
• cleanup_records will review and simplify records if possible

Known Issues

• The RLE algorithm still does not find all possible compression opportunities.
• EOF checking is only in data segment right now. This like size: 'EO', the first byte of the data segment: 'F' are not caught correctly.

Itty Bitty Ipsy

Ipsy is a tool for applying IPS (International/Internal Patch System) files. They are typically used for distributing emulator ROM changes as distributing the patched ROM would violate copyright law.

You can install ipsy-0.1 via pypi pip3 install ipsy or via the wheel below.

Features

• Merge

  • Combine multiple IPS patches into one large patch

• Patch

  • Apply an IPS patch to target file
  • Option to skip false EOF markers

• Diff

  • Create IPS patch given an unaltered and altered version
  • Option to use run length encoding

Issues

• RLE algorithm doesn't find all possible compression opportunities, only the obvious ones.
• Merge overlooks some instances where records could be simplified.