41C ROMs: LBL linkages

[RobertM]

(09-04-2019 09:45 PM)hth Wrote:  So I stand on my island and say the global chain matters and that there can only be one link value in global LBLs to make it all work properly.

Aha! (slaps forhead!!) I finally understand! I think your "island" is solid ground. Sorry for being dense.

So basically, the first label in the UCODE block has the link setup to include the number of nulls generated (1 - number of bytes in first register) and then +3 for the "next" next link in the chain, which it can assume is right justified in a register (because it was the old .END. before the COPY). And the linkages don't matter while they exist in ROM.

As you pointed out, those engineers were extremely clever in their design solutions.

Thanks for all the help!

-Robert