Intel has unveiled its vision for a simplified processor instruction set architecture . The plan focuses on streamlining the architecture by reducing support for legacy architectures and transitioning to a dedicated 64-bit structure called "Intel x86S."
With the prevalence of 64-bit operating systems and the increasing demand for more memory in modern software, a large number of people are already operating in 64-bit environments. This is compounded by the limitations of 32-bit systems, which could not support more than 4 GB of memory . Current software, such as Windows 11, no longer supports 32-bit CPU architectures, but the hardware remains compatible with older systems.
Intel prepares for exclusive 64-bit hardware
Seeing an opportunity to streamline their architecture and optimize performance, Intel proposes eliminating legacy 32-bit and 16-bit support . They want to move to a single, non-backward-compatible 64-bit architecture. This architecture, called x86S, aims to eliminate legacy modes they deem unnecessary, paving the way for faster systems in the future.
One of the main advantages of adopting the x86S architecture is the ability to shorten CPU boot times . By not having to page out previous modes during boot, the transition to a 64-bit architecture would reduce the reliance on several steps required to enter 64-bit operation.
Here are the advantages Intel says a 64-bit-only architecture would have:
- Simplified 64-bit segmentation model that provides segmentation support for 32-bit applications.
- Removed unused rings 1 and 2 and deprecated segmentation features like gates.
- Removed support for 16-bit addressing, ring 3 I/O port accesses, and chain port I/O, which supports an obsolete CPU-driven I/O model.
- Limiting the use of the local interrupt handler to X2APIC.
- Legacy 8259 support being phased out.
- Removal of some unused OS mode bits.
Those who want to run older operating systems and software on the latest Intel hardware suggest using mature software solutions based on virtualization and emulation to take advantage of virtualization hardware. This allows you to emulate the functions needed to boot legacy operating systems.
Source: Kitguru
