Incorrect dates?

[frankmilliron]

Hello!
I extracted some files from Total Replay using CADIUS EXTRACTFILE, and for some reason the dates are showing up as 100 years off.

MacOS Sequoia 15.0.1. Cadius installed via Homebrew.

[inexorabletash]

Just commentary here - ProDOS technically has only 2 digit dates, in a 7-bit field. There are a couple ways to encode dates over 1999 in common use:

• Encode/decode values 100-127 as 2000-2027.
• Follow ProDOS 8 Technical Note #28 and encode/decode values 00-39 as 2000-2039.

Decoding using both approaches simultaneously should be harmless (i.e. translate 124 to 2024, and also translate 24 to 2024). But I would refrain from encoding using the former, since a value > 99 may result in the "19100" problem for tools that were not tested beyond 1999, and erroneously giving a year of 1924 is probably better than a crash or latent data corruption.