imdc

A Python (3.8+) script to edit ImageDisk file (.IMD) comment headers.

This program displays, then edits, the comment header of an .IMD disk image.

Usage

imdc.py file.imd

Comments must be fully contained within code page 437.

Notes

The original ImageDisk (v1.18) generates files with this header format:

IMD v.vv: dd/mm/yyyy hh:mm:ss          (ASCII Header)
Comment (ASCII only - unlimited size)  (NOTE:  You can TYPE a .IMD)
1A byte - ASCII EOF character          (file to see header/comment)

Applesauce (as of v1.60b5) generates .IMD files with this header:

IMD generated by Applesauce Fast Imager 2022-01-26T02:36:56.082Z

followed by the 0x1A termination byte.

This utility was designed to work around Applesauce's lack of support for the .IMD comment field.

As Dave Dunfield's IMDA.COM rejects files with headers > 8192 bytes, and Keir Fraser's disk-utilities library rejects images with headers > 4096 bytes, this utility limits the header to 4096 bytes.