[0d0a]

Nice to see another CTF enjoyer :) I've always thought about using Ghidra for vm challenges, but I'm still not sure if it fits the typical timeframe. Although I never used it, something like binja seems more favourable to quick and dirty scripting.

About custom pcodeops, yeah I was really tempted to use them for TLCS-900. For example, instruction `daa` adjusts the execution result of an add or subtract as binary-coded decimal, and the pcode for that is just inglorious (but I'm sure there's worse out there): https://github.com/nevesnunes/ghidra-tlcs900h/blob/5ff4eb851...

Pretty amusing how a single instruction takes more than a dozen lines in the decompilation: https://gist.github.com/nevesnunes/7417e8bec2cddfcaf8d7653c9...