My partner made the Reviung41 keyboard for me as a gift. The bottom and top plates are walnut. It’s beautiful. It doesn’t have LEDs. The keycaps are blank black DSA profile. It has Cherry MX Clear keyswitches, which are nice and tactile, but quiet—ideal for my travel keyboard.
What surprised me was that this entire walk is fully hardware-driven -- no microcode involvement at all. The state machine reads the page directory entry, reads the page table entry, checks permissions, and writes back the Accessed and Dirty bits, all autonomously. Since it's hardware-driven, it runs in parallel with the microcode and needs its own memory bus arbitration -- the paging unit must share the bus with both data accesses from the microcode and prefetch requests from the instruction queue.
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18:46, 27 февраля 2026Бывший СССР
Here's a concrete example from far return (RETF). The microcode needs to determine whether this is a same-privilege or cross-privilege return, because the two cases require very different handling. Following execution order (not address order):
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