The text you posted doesn't make it in with the submission when there's a url. (It's on our list to modify the software to make that clear.) The way to do it is to submit the link and then post the text as a comment to the thread—which you'd be welcome to do here. The project looks cool!
KnightOS is a third-party Operating System for Texas Instruments z80 calculators. It offers many features over the stock OS, including multitasking and a tree-based filesystem, delivered in a Unix-like environment. KnightOS is written entirely in z80 assembly, with a purpose-built toolchain. Additionally, the KnightOS kernel is standalone, and you can use it as the basis for your own powerful operating systems.
Thanks! You're right: the text is stored (that's how I knew it existed) but doesn't show up when there's a URL. Unless, it seems, you're using a clever client.