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asst128's BIOS I uploaded is not original, it was modified twice (once by whoever designed the 3rd-party floppy interface, and then by the owner). Second change NOP's this block of code:

-000FE1EE: BA 01 01 mov dx,101h
-000FE1F1: E8 14 03 call 0FE508h
-000FE1F4: FA cli
-000FE1F5: F4 hlt