Langa Letter: Your Next PC: Legacy Free? - InformationWeek

InformationWeek is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Hardware & Infrastructure
05:35 PM
Fred Langa
Fred Langa

Langa Letter: Your Next PC: Legacy Free?

IBM's PC AT has cast a shadow over PC system architecture for more than two decades. Thanks to advances such as Intel's EFI, PC vendors are on the verge of breaking the legacy bottlenecks. Kiss your BIOS goodbye.

Although partially legacy-free designs have emerged at various times, no one has yet put all the pieces together and produced a PC that traces none of its hardware architecture to the original IBM designs.

But that's about to change. As the PC AT's 20th anniversary approaches, some vendors are already working on totally legacy-free designs that will finally do away with even such fundamentals as the BIOS--the basic input/output system that has booted every PC ever made since the original IBM PC design in 1981. (Yes, some legacy components go back even further than the AT. We'll come back to this point in a moment.)

Let's examine the major legacy components: we'll see where they came from, what they're evolving toward, and what it means for you. Strap yourself in--it's going to be quite a ride!

Bye-Bye, BIOS
The original IBM PC, introduced in 1981, contained the seeds of the design that would later (in the IBM AT of 1984) come to dominate PC architecture. This image (below), also scanned from an old Byte magazine, shows a photo of the actual hand-wired prototype motherboard for the original IBM PC--one of only two such prototypes built. That rough-looking circuit board is actually the forebear of all PCs ever made, an artifact as important as, say, Bell's first telephone or Edison's light bulb or the Wrights' Flyer.

Original IBM PC design

The original PC's resemblance to today's PCs is less obvious than the AT's because some of the 1981 IBM PC's features--such as the port for connecting the PC to an audiocassette recorder for data storage--have fallen into obsolescence. But several other important components and features carried over to the 1984 AT design and have lingered ever since.

For example, even that first prototype PC had a BIOS that contained simple setup and diagnostic routines and controlled how the system booted and ran, exactly as it does in today's PCs.

To be sure, the BIOS has evolved over time. For example, unlike today's BIOSes, the original PC BIOS also contained a complete (albeit modest) software language, so users could do something with their PCs without having to load additional software from a slow cassette drive or from an expensive, optional floppy drive. This language was a version of Basic supplied to IBM by a then-little-known company called Microsoft.

Although the BIOS has evolved, it's still there at the heart of literally every PC ever made, an architectural component so deeply entrenched it may be the very last piece of the original IBM PC legacy to fade away.

We welcome your comments on this topic on our social media channels, or [contact us directly] with questions about the site.
2 of 8
Comment  | 
Print  | 
More Insights
The State of Cloud Computing - Fall 2020
The State of Cloud Computing - Fall 2020
Download this report to compare how cloud usage and spending patterns have changed in 2020, and how respondents think they'll evolve over the next two years.
Top 10 Data and Analytics Trends for 2021
Jessica Davis, Senior Editor, Enterprise Apps,  11/13/2020
Where Cloud Spending Might Grow in 2021 and Post-Pandemic
Joao-Pierre S. Ruth, Senior Writer,  11/19/2020
The Ever-Expanding List of C-Level Technology Positions
Cynthia Harvey, Freelance Journalist, InformationWeek,  11/10/2020
Register for InformationWeek Newsletters
Current Issue
Why Chatbots Are So Popular Right Now
In this IT Trend Report, you will learn more about why chatbots are gaining traction within businesses, particularly while a pandemic is impacting the world.
White Papers
Twitter Feed
Sponsored Live Streaming Video
Everything You've Been Told About Mobility Is Wrong
Attend this video symposium with Sean Wisdom, Global Director of Mobility Solutions, and learn about how you can harness powerful new products to mobilize your business potential.
Sponsored Video
Flash Poll