================================================================================
DDP TEST REPORT -- generated blank packs validated
================================================================================
Date: 2026-06-14

Both generated blank packs were tested against every check the ADAM's EOS
applies when deciding whether a pack is formatted and usable, plus byte-identity
against the two known-good reference packs you provided.

RESULT: ALL TESTS PASS (both formats).

--------------------------------------------------------------------------------
HE CENTER DIRECTORY PACK (blank_HE_center.ddp)
--------------------------------------------------------------------------------
  PASS  size == 262144 (256 x 1024)
  PASS  boot block present ('Initializing Media')
  PASS  recognition signature 55 AA 00 FF at directory offset 0x0D
  PASS  directory entries == FIRST DIR / BOOT / DIRECTORY / BLOCKS LEFT
  PASS  BLOCKS LEFT free count == 254
  PASS  block accounting sums to 256  (boot 1 + dir 1 + free 254)
  PASS  free blocks filled with 0xE5
  PASS  directory second half is 0xE5 fill
  PASS  byte-for-byte identical to real working HE pack

--------------------------------------------------------------------------------
GW RIGHT DIRECTORY PACK (blank_GW_right.ddp)
--------------------------------------------------------------------------------
  PASS  size == 262144 (256 x 1024)
  PASS  boot block present ('Initializing Media')
  PASS  recognition signature 55 AA 00 FF at directory offset 0x0D
  PASS  directory entries == FIRST DIR / BOOT / DIRECTORY / BLOCKS LEFT
  PASS  BLOCKS LEFT free count == 253  (GW reserves last physical block)
  PASS  block accounting sums to 256  (boot 1 + dir 1 + free 253 + reserved 1)
  PASS  free blocks filled with 0xE5
  PASS  GW directory tail byte 0x3FF == 0xFF (reserved-end marker)
  PASS  byte-for-byte identical to real right-directory reference pack

--------------------------------------------------------------------------------
NOTES
--------------------------------------------------------------------------------
- The directory entry count field is LITTLE-ENDIAN (e.g. FE 00 = 254). This was
  confirmed against the real packs during testing.
- Because both generated packs are byte-identical to packs the ADAM already
  accepted, they are expected to mount and read as blank initialized packs on
  real hardware and on the SD-DDP unit (HE).
- Test harness: test_ddps.py (re-runnable).

VERIFICATION BOUNDARY (unchanged, stated honestly)
- These tests validate the .ddp IMAGE (directory + structure + byte-identity).
- The on-drive FORMAT firmware that writes block HEADERS was separately verified
  in simulation (headers valid for HE and GW). Real-silicon analog bit-cell
  timing remains the one item to confirm on a scope / in MAME before mass burns.
================================================================================
