The PC Basic Input / Output System (BIOS) will be launched 3 in 3 years and after launch, it will be if it dies on the 64-bit Intel platform. In recent years, Intel has implemented its Unified Extensible Firmware Interface (UEFI) process with legacy BIOS support as an additional option, but by 2020, UEFI wants to remove legacy BIOS support by improving the company’s security. For most users, the removal will be ignored, but for those who use legacy hardware on new platforms and rely on it, it is meant to be transferred to another platform.
Over the years, the BIOS functionality has improved, but its main objectives were intact – running POST (power self-test) OS to detect and launch the original system components (CPU, RAM, GPU, storage, DMA controller etc.) Provides some specific I / O functions for booting and then for older operating systems. In the early 1980s there were many limitations (a 16-bit processor mode, 1 megabytes of spaceable memory space) in standard PC bikes, which were hacked in the late 1980s, but in the 2000s, the industry began to move forward to a new iteration: UEFI The UEFI was designed to not be limited to the tenth year and it is generally better.
In order to ensure a smooth transition from BIOS to UEFI (which makes use of 16-bit opera compatible with legacy software and hardware), Unified EFI Forums (which consists of virtually all important developers / hardware providers) defined in some UEFI systems, class process and smooth To help the process, UEFI class 2 introduced an optional adjusting support module (CSM).
Most PCs today feature UEFI Class 2 and thus can publish UEFI or BIOS interfaces, which can be selected in BIOS configurations. Systems are already in the UEFI category with 3/3 + (i.e., Microsoft Surface Book), but they are rare. To achieve skills like the UEFI Security Boot Radius, by 2020, plans to remove CSM support from new clients and server platforms. As a result, at this moment the new platform will be strictly UEFI class 3.
Once the CSM is removed, new platforms are unable to run 32-bit operating systems, the software (at least natively) cannot use the related software and is unable to use old hardware, such as RAID HBA (and so are the older hard drives connected to HBAs), network cards and Graphics card that lacks UEFI-compatible vBIOS (introduced before 2012-2013). Those who need older programs will still be able to run in virtualization mode, but older hardware will have to end or stay on older platforms.
For the remaining years, Intel encourages its partners to improve the UEEFI user experience, promote UEFI features such as secure boots, signed capsules and others, and remove DOS / BIOS dependency from production maintenance tools. Basically reduce the significance of CSM
An interesting question about the devaluation of legacy BIOS support on Intel’s new platform is one of the first to drop the CSMT in the client space. Intel is generating a number of client platforms for mainstream desktop and mobile PCs (Canon Lake, Ice Lake) which will be released in the coming years, but now we have a CSM in 2020. If it’s over a hard change.
It will be seen whether AMD has a similar plan – we have reached to determine the game’s status. The main reason that Intel is performing this change for security, and specific OEMs may require certain UEFI features in their future products.
Update 11/23: * The original BIOS was discovered by Gary Kendall’s Digital Research Computer in the Intel 8080/85 processor and CP / M operating system in about 1975. Then, based on IBM Intel 8088 IBM PC included its Microsoft BIOS in 1981. From the history of personal computers many start with IBM PCs, so since the beginning of the year the history of the BIOS began. In this case, today BIOS is 36 years old