AS/ZC (Zip Chunker)

File Format
Name	AS/ZC (Zip Chunker)
Ontology	Electronic File Formats Archiving AS/ZC (Zip Chunker)
Extension(s)	.as, .zc
Released	1991

AS/ZC is what we're calling the container format used for file fragments, by the arbitrary-format mode of several file splitting utilities developed by Scott Jibben / Jibben Software. Specifically:

• Zip Chunker (ZC), v2.00+
• Archive Sizer, renamed to Zip Chunker Pro (ZCP) as of v3.00
• LHA Chunker

The filename extension was changed from .AS to .ZC in ZC v3.01 and ZCP v3.01.

Note that the flagship feature of these utilities is splitting standard archive formats, in which case the AS/ZC format is not used.

Identification

AS/ZC files are observed to start with ASCII "AS", followed by bytes af 10 64 00, though it's unclear how much of this can be relied on as a signature.

Software

For DOS, except as noted.

• Zip Chunker
  • Zip Chunker v1.02 (for reference; does not support AS/ZC)
  • Zip Chunker v2.01
  • Zip Chunker v3.01 - DOS, OS/2, Windows console

• Archive Sizer / Zip Chunker Pro
  • Archive Sizer v2.01
  • Zip Chunker Pro v3.01 - DOS, OS/2, Windows console

• LHA Chunker
  • LHA Chunker v2.01

Links

• Zip Chunker (Pro) website