OK, symlist command doesn't cause the crash and do command recognizes 8-bit registers. But I think it's better to add "length" variable into tagmap_entry then read it directly instead of using strlen() in tagmap_hash(). (It's complete my error!)
BTW, GFX viewer crashes when you select "TMAP" section in bygone with multithreading = 1. Someone confirmed? This option is demon's gate for me because internal debugger freezes and ktiger/twincobr crashes at boot though...
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"Any company has no power to stop people emulating"
MAME is the emulator of no giving in the pressure from any company even if they don't allow