@lanodan From my understanding, most RISC-V specifications (including SBI) don't expect any kind of input devices or special shortcuts.
So any kind of SysRQ-magic is just using the default input driver from the kernel. This is what Linux does at least.
It's possible that a device has an interrupt source for this use-case - check the device tree. Though I'm not very familiar with RV hardware, no idea if there exists a board with such a feature.
Reminder: Control-Z (^Z) is UNDO! In their continuing push to force AI down users' throats, #Google has removed the standard "Undo" option from the top of many right-click text input context menus as displayed by the Chrome browser, replacing it with a useless "Help me write" function (protip: Do your writing yourself!).
Whether or not you still currently see Undo in various situations likely depends on your browser version, but clearly the replacing of Undo with "Help me write" is well under way.
Google's removal of the widely used and pretty much universally forever undo function is already causing problems for users who have been using it for many years and are unfamiliar with the associated shortcut. This really is a slap in the face to nontechie users in particular who tend to rely on context menus and not shortcuts.
So yeah, you can use keyboard Control-Z to UNDO, but if you don't already know that, you're screwed, because Google removed Undo from the menus without any warning or explanation. How Google has fallen.
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