Changes
ret
</pre>
<br>
==Visual representation==
As one may see, the nybbles in the sequence are based on two 4bit shift registers.
<br>
==Patent==
For one reason or another, Amstrad has patented the verification mechanism ([[Media:Patent GB2243701A.pdf|GB2243701A]]). The patent seems to focus on ''verifying'' (rather than on ''sending'') the sequence, so its legal use is a bit unclear.
<br>
[[Category:Programming]]
[[Category:CPC Plus]]
