I’ve now been working on floss, my own operating system (OS) from scratch for AArch64, which is really just a kernel so far, for a couple of months since my last post about Interrupts and the Generic Interrupt Controller on AArch64. Right now, floss targets QEMU’s virt and Raspberry Pi 4 (rpi4) boards, as well as real Raspberry Pi 5 (rpi5) hardware. Testing on real hardware has been rewarding ...