Opcode request

[L3P3]

I try to run a demo: https://hd0.linusakesson.net/files/lft-sommargubbe.prg

But it does not work:
Unknown instruction: AXS at $16E4

I assume it is some undocumented hack instruction that lft uses here but maybe it is a good next step for extending the implementation... 😉

[kondrak]

I really need to get back to this project at some point :) I'll leave this open for future reference, there's more than just this one instruction that could be implemented from the non-standard set.