is there any way to post process a block of code or data or both in fasm1?

say after assembling a block instructions i want to xor every byte with a key.

i dont mind incremental xor too.

the goal is to rely on fasm instead of external tool to xor that block of bytes.

if important my xor key is 87h or 135d.

i tried different ways, but i dont seem to understand how to use it.

first thing i replaced the_key with 87h, then i tried to place instructions before end while, but nothing happens. (also tried other ways)

would you please provide an example? thanks.

See https://board.flatassembler.net/topic.php?t=2126 for a more thorough example.

thank you.