Device support needed for something approaching a "minimum viable product" :thinking:

[tkchia]

• [ ] Screen output
  • [x] via VGA option ROM, if present
  • [ ] via framebuffer from UEFI bootloader
• [ ] Keyboard input
  • [x] via PS/2 keyboard — partially working
  • [ ] via USB keyboard directly (vs. legacy emulation)
    • [ ] EHCI
    • [ ] XHCI
• [ ] Storage drive I/O
• [ ] Time-keeping — useful-to-have capability for interacting with other devices e.g. keyboard and storage (!)
  • [X] via legacy PIT and/or CMOS RTC
  • [ ] via time stamp counter (rdtsc) or APIC timer, on a CPU
  • [ ] via HPET or ACPI timer, outside CPUs

:thinking: