Computer Architecture on The Coders Blog

Z80 vs. 6502: A Deep Dive into Vintage Processor Architectures

Tue, 05 May 2026 16:26:27 +0000

In the annals of 8-bit computing, two titans stand out: the Zilog Z80 and the MOS Technology 6502. These chips, while both foundational to a generation of personal computers and game consoles, represent fundamentally different design philosophies, each with profound implications for performance, programming, and ultimate application. Understanding their technical nuances reveals why one became the workhorse of business computing and the other the darling of the arcade and home gaming.

The Memory Wall: Why Sally McKee's Foundational Concept Still Dominates 2026 Computing

Fri, 01 May 2026 16:16:06 +0000

You’re building a system in 2026. You’re optimizing for latency, throughput, or energy. You’re hitting a wall. That wall is the memory wall, and it’s not going anywhere.

The Unyielding Reality: McKee’s Prophecy in 2026

The year is 2026, and despite decades of staggering innovation in computing, one fundamental bottleneck persists, relentlessly dictating the limits of performance: the memory wall. This isn’t a new revelation; it’s a concept articulated with startling prescience by Sally McKee and William Wulf in their seminal 1995 paper, “Hitting the Memory Wall: Implications of the Obvious.” What was a profound insight then, is the undisputed, dominant performance limiter now.

Beyond Binary: Why Your Textbook Search Algorithm is Obsolete (2026)

Fri, 01 May 2026 11:41:13 +0000

Your textbook binary search is a performance bottleneck you don’t even see. For senior developers in high-performance contexts, clinging to naive implementations costs critical cycles, and modern hardware just made it undeniably obsolete.

The Silent Performance Killer: Why Textbook Binary Search Fails Modern CPUs

Traditional binary search, while asymptotically optimal in O(log N) comparisons, is demonstrably not hardware-optimal for contemporary processors. The theoretical elegance of logarithmic time complexity often blinds engineers to the brutal realities of modern CPU architecture. We’ve optimized for comparisons, not for cache lines or instruction pipelines.