Standalone TIM-pack format Confirmed

Overview

Implementation: crates/prot/src/timpack.rs.

Header (8 bytes)

u8  magic_lo            // arbitrary
u8  magic_hi            // arbitrary
u8  disc               // < 0x10  (discriminator byte, NOT the count)
u8  marker              // == 0x01
u32 tim_num             // entry count at +4; offset table follows at +8

The byte[3] == 0x01 / byte[2] < 0x10 pair is the magic discriminator; the entry count is the u32 tim_num at +4 (so the offset table begins at byte +8). The detection function is_tim_pack checks the signature pair, that tim_num is positive, and that the offset table fits within the blob.

Offset table

Each table entry is a u32 word index, decoded as:

byte_offset = word_index * 4 + 4

The +4 is the difference from the pack format: this format adds a constant offset, suggesting the offsets are relative to the END of the count word rather than the start of the pack.

Item type detection

detected_ext(item) returns "TIM" if the first byte is 0x10 (PSX TIM magic), else "BIN".

See also