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The ISA is similar to but still smaller than Wirth's RISC5 (unrelated to RISC-V). The choice of including DIV (and MUL) in such a small ISA suggests that's it's not guided by physical implementation.

A RISC-V RV32IM[S] implementation (be that emulator or RTL) would have similar complexity and size, and would have a far more mature software stack.

Blinking text tells me this site isn't serious.
Wow. Blinking text. The nostalgia trip that's actively hostile to epileptics.
The typical range of problematic frequencies for photosensitive epilepsy is around 3-30Hz (with e.g. the UK having laws that govern flashing lights in the 2-50Hz range). One small chunk of text blinking at a 1s interval (1Hz), while annoying, is almost certainly not a seizure risk.
OK, technically, it's "Flicker Vertigo":

> Flicker vertigo, sometimes called the Bucha effect, is "an imbalance in brain-cell activity caused by exposure to low-frequency flickering (or flashing) of a relatively bright light."[1] It is a disorientation-, vertigo-, and nausea-inducing effect of a strobe light flashing at 1 Hz to 20 Hz, approximately the frequency of human brainwaves.[2][3] The effects are similar to seizures caused by epilepsy (in particular photosensitive epilepsy), but are not restricted to people with histories of epilepsy.

https://en.wikipedia.org/wiki/Flicker_vertigo

Happy now?

Don't put crap in your page which can trigger neurological events, even if it isn't technically epilepsy!

I wish every browser had an option to turn the blinking off, filed under “accessibility”.
That would be nice (even for non-epileptics), but in the meantime a alternative is:

  blink { text-decoration: none !important; }
  * { animation: none !important; } /* or -whatever-animation as needed */
Ideally, we could embed a time-domain low-pass filter in the graphics rendering pipeline, so we aren't relying on the Internet of Hate[0] to not deliberately or accidentally exacerbate medical conditions or the Browser of Spam and Spyware[1] to do anything about it.

0: aka the internet: https://news.ycombinator.com/item?id=17785162

1: https://news.ycombinator.com/item?id=18324681

I wish everyone were interested in making others feel welcome, as opposed to sick.