ASCII.jp Donki 20,000 yen The PC was a machine that was worth investigating, such as being equipped with 64-bit UEFI.

I checked the firmware of Donki 20,000 yen PC because the installation of Windows 10 RS3 failed.

Don Quijote's 20,000 yen PC, "MUGA Stoic PC KNW14FHD-SL," which I introduced last time, has become unrecoverable due to the installation of RS3, as I wrote a little last time. This time, it is a report on the firmware of the same PC (hereinafter referred to as MUGA) investigated in the process of recovery.

MUGA is equipped with 64-bit UEFI as firmware and does not have a built-in "CSM" (Compatible Support Module), which is commonly called BIOS emulation. However, with the built-in UEFI shell, I was able to check the status of the system in various ways.

UEFI is a firmware currently managed by the Unified EFI Forum, and is a multi-platform firmware that is used in IA-32 and IA-64 as well as ARM processors. Originally, it was being developed by Intel as EFI (Extensible Firmware Interface).

This is because the BIOS used in the PC architecture depends on the hardware of the early IBM PC and the 16-bit CPU 8086/8088, which was later developed for 64-bit CPUs such as IA-64. It was difficult to use.

Therefore, Intel developed EFI as a firmware with reduced platform dependence, and then transferred the development responsibility to the Unified EFI Forum, and from this time it became known as UEFI. For this reason, the term EFI may still remain in UEFI-related materials.

MUGA has a built-in UEFI that boots in 64-bit mode (long mode). However, since it is a pre-installed machine, it does not have a CSM for compatibility with the BIOS like a self-made motherboard. It's a pre-installed machine, which is not a bad thing, but from past experience, even if you try to use boot media that supports BIOS, you can't boot it with MUGA. You should be aware of this point.

The most recent OS supports installation and booting to UEFI even on Linux. I also installed Ubuntu 17.10.

I installed Ubuntu Ver.17.10, one of the Linux distributions.Some devices weren't recognized, but were at least operational

Practical installation was possible, although there were some glitches in the wireless LAN and sound. Specifically, the wireless LAN did not work with IEEE802.11a in the 5GHz band, and Bluetooth and sound devices were not recognized. However, the graphics, keyboard, touchpad, and 802.11b / g / n wireless LAN are working, and the minimum usage is possible. Sleep seemed to work fine, and the battery didn't run out in a blink of an eye.

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