begin/end flag on 12C

[grsbanks]

It's one of the bits in the CPU's status register so I'm not sure how you'd go about extracting that on a 12C with no means of synthetic programming.

What exactly are you trying to achieve? It might be possible to use something more accessible (such as a register) to hold the value and make the decision what to do, then run BEGIN or END in the corresponding program branch.