"To be honest, I have never done any serious assembler programming!"

On more careful reflection, I realise that this is rubbish!

I did a project with an NEC 75P008 4-bit micro entirely in Assembler - as there was no 'C' compiler for it at the time.

An interesting feature of this processor was that it has no conditional jump instructions - only conditional skip instructions. These cause the next instruction to be skipped if the condition is met - so a conditional branch is implemented by conditionally skipping an unconditional branch!