help with mpasm code

hi, i am trying to build a very easy circuit on multisim that demonstrates manchester encoding (and maybe decoding, i dont have a heap of time). basically i need to create a random word (8 bits) feed this into a pic (16f84a) and show the manchester equivalent at the other end.

i am very new to using mpasm and pbp etc so i was wondering if anyone could help me out. i have looked at all the manchester encoding/decoding examples on this forum and they were very helpful.

Cheers! Davy