PC-98 ide.rom and scsi.rom from archive.org np2kai_bios pack.
Tyrian 2000 Episode 5 data + shapes + sprites moved to data/
opentyrian/ (53 files from archive.org msdos_Tyrian_2000).
8 Xbox BIOS variants (mcpx-1.1, xbox-3944 through 5838)
from Myrient MAME bios-devices. PC-98 SASI controller ROM
for NP2kai/nekop2. Cross-reference: 146 true missing.
Move 17 case-colliding BIOS variants to .variants/ so Windows
and macOS clones no longer lose files. Existence-based platforms
keep the primary, MD5-based platforms resolve from .variants/.
Also fix resolve_local_file zipped_file resolution: when multiple
ZIPs share a name, verify the inner ROM exists before accepting
a candidate. Fixes adam_fdc.zip resolving to the wrong archive.