Downgrade or Switch IR/IT mode for LSI 8211-8i

1. Erasing the rom is inevitable, so this can only be done under DOS or UEFI shell. And remember, do NOT reboot between erasing and flashing stages.
2. Commands are:

[sas2flash] -o -e 6
[sas2flash] -o -f [firmware_name] -b [rom_name]

3. For DOS, use rufus to create a bootable DOS/FreeDOS usb stick and copy flash executable, firmware and bios. Boot from usb stick and run commands.
4. However, for modern computers, this probably gives error "ERROR: Failed to initialize PAL. Exiting program."
5. So the only way is UEFI shell. If your motherboard has EFI shell then just enter shell and run commands.
6. For gigabyte hybrid EFI motherboards or similar without shell (e.g. GA-Z87X-UD4H), use rEFInd image instead, and flash with rufus's dd image function as those motherboards do not support UEFI booting from anything other than EFI partition.
7. Unfortunately sas2flash utility requires EFI shell ver. 1, it will give error "InitShellApp: Application not Started from Shell".
8. Download ver. 1 shell from edk2. Put it on root of any disk/removable media. Boot into rEFInd and it will show option to boot from ver.1 shell.
9. Find sas2flash files with "map -b" and enter corresponding filesystem with fsX: (X is partition label, 0…1 and A…Z) and cd.
10. Run commands.

原厂 | OEM

原厂（G80 系列）的问题自然是很大，凹凸不平的激光蚀刻填料，黑色版 FJ 凹陷代替突起，F 区那个距离，整体做工也是毛糙。
但是用了很久各式各样的 OEM 以后，还是回归了原厂。

1. 原厂的键帽比较低，而且下沿很薄，加上没有钢板带来的额外高度，使得原厂成为几乎唯一的不需要手托的机械键盘。用原厂白轴代替 RF104 的一个重要原因就是因为不需要手托，手感来说我反而还是喜欢 RF104 多一点。在实验室就无所谓了，桌子边缘是有弧度的 PU 材质，已经自带了掌托属性。挺想买实验室这种 Falcon 桌子，但是一千多块的价格还是太感人。
2. 原厂无钢板。钢板震手带来的不适感我到现在还是没有适应，尤其是弹簧力量比较强的白轴，钢板还会有弹簧的回音，那种不适感简直可以和指甲刮黑板相比。实验室那把加了 O-ring 所以无所谓。