I couldn't resist and quickly hacked together a proof-of-concept desaster recovery tool - use it at your own risk :)

http://www.horus.com...er-recovery.zip

Boot the ATR with the freezer oldrunner enabled, load UFLASH.COM (sorry for the nameclash, couldn't think of a better name), then choose option 1, keep starting bank and number of banks at their default (0) and choose one of the 2 ROMs on the ATR: OLD.ROM is the one my U1MB shipped with, NEW.ROM is this one (http://spiflash.org/atari/ultimate/Ultimate1MBv2_with_pbi_and_loader.rom) from candle's website.

The flasher supports the AMIC 29040B chip and also AMD 29F040, ST 29F040B and BM 29F040, but not the newer (ST? SST?) chip with the 4k sector blocks (sorry, don't have one to test and it would require some significant code changes, my current flasher implementation needs a minimum block size of 8k).

As a safety measure the flasher disables the OS ROM when it initializes the flasher code, so your Atari should crash if you run it without the freezer oldrunner enabled. Having the OS already in RAM works, too (do a "COLD /N" in SDX, boot the ATR, load HISIO.COM and then UFLASH.COM).

so long,

Hias