z386: An Open-Source 80386 Built Around Original Microcode

1 comments

• mmastrac 27 minutes ago
  Did the microcode disassembly find any useful backdoors to read microcode without decapping?
  [-]
  • nand2mario 20 minutes ago
    Not really. The 386 does not have an interface to read the ROM direclty. Instead, it uses the Built-In Self-Test (BIST) to verify the ROM's contents. It's basically a checksum-like mechanism that verify the integrity of the CROM.