Command-line tools for working with data files in Ultima 6 on the SNES
usage: decompress.py [-h] [--debug [DEBUG]] in_path out_path
positional arguments:
in_path Input file path, optionally suffixed by colon then a byte
offset e.g. rom.sfc:0x80ff or rom.sfc:65535 (prefix with 0x
for hex)
out_path Output file path, optionally suffixed by colon then an
offset to write a range into an existing file
optional arguments:
-h, --help show this help message and exit
--debug [DEBUG] (Optional) Path to write a debug file listing compressed
strings
usage: compress.py [-h] [--debug [DEBUG]] in_path out_path
positional arguments:
in_path Input file path, optionally suffixed by colon then a byte
offset e.g. rom.sfc:0x80ff or rom.sfc:65535 (prefix with 0x
for hex)
out_path Output file path, optionally suffixed by colon then an
offset to write a range into an existing file
optional arguments:
-h, --help show this help message and exit
--debug [DEBUG] (Optional) Path to write a debug file listing compressed
strings
# Make a copy of your ROM to write modifications to
cp u6.sfc u6_modded.sfc
# Extract dialog file
./decompress.py u6.sfc:0x48000 dialog1.raw
# Make changes to dialog1.raw
# Reinsert dialog file into modded ROM
./compress.py dialog1.raw u6_modded.sfc:0x48000
This list was generated by scanning every 16 byte-aligned section of the USA ROM for valid-looking LZW streams. It may not be 100% accurate.
| Start address | End address | Compressed size | Decompressed size | Free space at end | Compression ratio | Recompresses? | Purpose |
|---|---|---|---|---|---|---|---|
| 01d700 | 01fef6 | 10230 bytes | 17479 bytes | 1.71 : 1 | 266 bytes | ✔️ | |
| 028060 | 029c62 | 7170 bytes | 12132 bytes | 1.69 : 1 | 46 bytes | ✔️ | Title screen graphics |
| 029e50 | 02dda1 | 16209 bytes | 21824 bytes | 1.35 : 1 | 15 bytes | 1 byte larger | Intro graphics (loaded 1st before intro cutscene) |
| 02ddb0 | 02e586 | 2006 bytes | 30720 bytes | 15.3 : 1 | 10 bytes | 1 byte larger | Intro graphics (loaded 3rd before intro cutscene) |
| 02e590 | 02efd5 | 2629 bytes | 5088 bytes | 1.94 : 1 | 60 bytes | 3 bytes smaller | Intro graphics (loaded 2nd before intro cutscene) |
| 02f1d0 | 02f913 | 1859 bytes | 3488 bytes | 1.88 : 1 | 13 bytes | ✔️ | End cutscene graphics |
| 02f920 | 02fdb9 | 1177 bytes | 11520 bytes | 9.79 : 1 | 583 bytes | ✔️ | End cutscene graphics |
| 048000 | 049cf0 | 7408 bytes | 12026 bytes | 1.62 : 1 | 16 bytes | ✔️ | Dialog (companions, Lord British, etc.) |
| 049d00 | 04b861 | 7009 bytes | 11033 bytes | 1.57 : 1 | 159 bytes | ✔️ | Dialog |
| 04b900 | 04de05 | 9477 bytes | 15210 bytes | 1.60 : 1 | 251 bytes | ✔️ | Dialog |
| 04df00 | 04fd90 | 7824 bytes | 12516 bytes | 1.60 : 1 | 624 bytes | ✔️ | Dialog |
| 050000 | 051a05 | 6661 bytes | 10516 bytes | 1.58 : 1 | 251 bytes | ✔️ | Dialog |
| 051b00 | 0538c2 | 7618 bytes | 11630 bytes | 1.53 : 1 | 62 bytes | ✔️ | Dialog |
| 053900 | 055ed4 | 9684 bytes | 15469 bytes | 1.60 : 1 | 172 bytes | Same size, different bytes | Dialog |
| 055f80 | 057919 | 6553 bytes | 9989 bytes | 1.52 : 1 | 1767 bytes | ✔️ | Dialog |
| 058000 | 05ba14 | 14868 bytes | 24387 bytes | 1.64 : 1 | 108 bytes | ✔️ | Dialog |
| 05ba80 | 05d416 | 6550 bytes | 10140 bytes | 1.55 : 1 | 106 bytes | ✔️ | Dialog |
| 05d480 | 05fd95 | 10517 bytes | 16964 bytes | 1.61 : 1 | 619 bytes | ✔️ | Dialog |
| 060000 | 061955 | 6485 bytes | 10356 bytes | 1.60 : 1 | 171 bytes | ✔️ | Dialog |
| 061a00 | 062dca | 5066 bytes | 7948 bytes | 1.57 : 1 | 54 bytes | 1 byte larger | Dialog |
| 062e00 | 065d95 | 12181 bytes | 19966 bytes | 1.64 : 1 | 107 bytes | ✔️ | Dialog |
| 065e00 | 06710a | 4874 bytes | 9484 bytes | 1.95 : 1 | 118 bytes | 1 byte larger | Dialog |
| 067180 | 0678d5 | 1877 bytes | 2656 bytes | 1.42 : 1 | 1835 bytes | ✔️ | Dialog |
| 068000 | 069e0a | 7690 bytes | 11885 bytes | 1.55 : 1 | 118 bytes | ✔️ | Dialog |
| 069e80 | 06ba70 | 7152 bytes | 11291 bytes | 1.58 : 1 | 272 bytes | ✔️ | Dialog |
| 06bb80 | 06d3da | 6234 bytes | 9525 bytes | 1.53 : 1 | 166 bytes | ✔️ | Dialog |
| 06d480 | 06fa93 | 9747 bytes | 16443 bytes | 1.69 : 1 | 1389 bytes | ✔️ | Dialog |
| 070000 | 0715e0 | 5600 bytes | 8335 bytes | 1.49 : 1 | 32 bytes | 2 bytes smaller | |
| 071600 | 073651 | 8273 bytes | 12570 bytes | 1.52 : 1 | 47 bytes | 2 bytes smaller | |
| 073680 | 075007 | 6535 bytes | 10274 bytes | 1.57 : 1 | 121 bytes | 10 bytes smaller | |
| 075080 | 075a44 | 2500 bytes | 3619 bytes | 1.45 : 1 | 60 bytes | ✔️ | ? Loaded 1st outside castle |
| 075a80 | 0761be | 1854 bytes | 2494 bytes | 1.35 : 1 | 66 bytes | ✔️ | ? Loaded 1st in castle tower |
| 076200 | 076968 | 1896 bytes | 2602 bytes | 1.37 : 1 | 24 bytes | 1 byte smaller | |
| 076980 | 0770ea | 1898 bytes | 2629 bytes | 1.39 : 1 | 22 bytes | ✔️ | |
| 077100 | 0779ca | 2250 bytes | 3043 bytes | 1.35 : 1 | 1590 bytes | ✔️ | |
| 096b00 | 0977fb | 3323 bytes | 23762 bytes | 7.15 : 1 | 5 bytes | 1 byte larger | Map data? Loaded 2nd outside castle |
| 09d000 | 09d943 | 2371 bytes | 16898 bytes | 7.13 : 1 | 189 bytes | 6 bytes smaller | Map data? Loaded 2nd in castle tower |
| 09da00 | 09e1ef | 2031 bytes | 15380 bytes | 7.57 : 1 | 273 bytes | 2 bytes smaller | |
| 09e300 | 09ebd3 | 2259 bytes | 16700 bytes | 7.39 : 1 | 45 bytes | 3 bytes larger | |
| 09ec00 | 09f488 | 2184 bytes | 13928 bytes | 6.38 : 1 | 120 bytes | ✔️ | |
| 09f500 | 09f92f | 1071 bytes | 6536 bytes | 6.10 : 1 | 1745 bytes | 1 byte larger | |
| 0bf100 | 0bf81a | 1818 bytes | 2710 bytes | 1.49 : 1 | 2022 bytes | ✔️ | |
| 0cd400 | 0cea21 | 5665 bytes | 8164 bytes | 1.44 : 1 | 95 bytes | Same size, different bytes | |
| 0cea80 | 0cfcf1 | 4721 bytes | 6682 bytes | 1.42 : 1 | 783 bytes | 1 byte larger | Tile data |
| 0d0000 | 0d2133 | 8499 bytes | 12492 bytes | 1.47 : 1 | 77 bytes | 3 bytes larger | Tile data |
| 0d2180 | 0d41e3 | 8291 bytes | 13397 bytes | 1.62 : 1 | 29 bytes | ✔️ | Tile data |
| 0d4200 | 0d65e5 | 9189 bytes | 14189 bytes | 1.54 : 1 | 27 bytes | 1 byte smaller | Tile data in castle |
| 0d6600 | 0d67b1 | 433 bytes | 701 bytes | 1.62 : 1 | 79 bytes | 2 bytes larger | |
| 0d6800 | 0d6d2c | 1324 bytes | 1632 bytes | 1.23 : 1 | 84 bytes | 1 byte larger | |
| 0d6d80 | 0d6f8a | 522 bytes | 783 bytes | 1.50 : 1 | 118 bytes | ✔️ | |
| 0d7000 | 0d7230 | 560 bytes | 807 bytes | 1.44 : 1 | 80 bytes | ✔️ | |
| 0d7280 | 0d7495 | 533 bytes | 847 bytes | 1.59 : 1 | 107 bytes | 1 byte larger | |
| 0d7500 | 0d7c4e | 1870 bytes | 3091 bytes | 1.65 : 1 | 946 bytes | ✔️ | |
| 0d8000 | 0d94da | 5338 bytes | 7352 bytes | 1.38 : 1 | 38 bytes | 1 byte smaller️ | |
| 0d9500 | 0da2b2 | 3506 bytes | 5175 bytes | 1.48 : 1 | 78 bytes | 3 bytes smaller | |
| 0da300 | 0dc0d3 | 7635 bytes | 12026 bytes | 1.58 : 1 | 45 bytes | Same size, different bytes | Tile data |
| 0dc100 | 0de067 | 8039 bytes | 11655 bytes | 1.45 : 1 | 153 bytes | ✔️ | Tile data |
| 0de100 | 0df199 | 4249 bytes | 6094 bytes | 1.43 : 1 | 103 bytes | ✔️ | Tile data |
| 0df200 | 0dfdd1 | 3025 bytes | 4492 bytes | 1.48 : 1 | 559 bytes | ✔️ | |
| 0e0000 | 0e0fa9 | 4009 bytes | 5472 bytes | 1.36 : 1 | 87 bytes | ✔️ | |
| 0e1000 | 0e31ae | 8622 bytes | 12729 bytes | 1.48 : 1 | 82 bytes | 3 bytes smaller | |
| 0e3200 | 0e47ba | 5562 bytes | 7625 bytes | 1.37 : 1 | 70 bytes | Same size, different bytes |