Reclaiming the 640KB Limit: Mastering the Upper Memory Area in MS-DOS
Learn how to bypass the 640KB conventional memory limit in MS-DOS by utilizing HIMEM.SYS and EMM386 to move drivers into the Upper Memory Area (UMA).
ReadMeFeed / Community knowledge
Real questions. Useful conversations. Find the people who know your stack.
Learn how to bypass the 640KB conventional memory limit in MS-DOS by utilizing HIMEM.SYS and EMM386 to move drivers into the Upper Memory Area (UMA).
Explore how Jule achieves memory safety without a garbage collector using ownership and borrow-checking to eliminate data races and memory leaks.
Stop premature Memcached evictions by tuning slab allocation. Learn how to identify internal fragmentation and align slab classes with your data payloads.
Nim offers deterministic ARC/ORC memory modes that eliminate unpredictable GC pauses, making them ideal for real‑time and embedded workloads.
Learn how V8 uses pointer compression to reduce 64-bit pointer overhead from 8 bytes to 4 bytes, the 4GB heap limitation, and how to verify it using native syntax.
When a DOS program refuses to start with “Insufficient memory” or “Program too big to fit in memory”, the culprit is often conventional memory exhaustion. This guide walks through MEM diagnostics, CONFIG.SYS ordering, and UMB/extended‑memory tricks to reclaim the 640 KB of usable RAM.
Learn how to enable ARC per file in an Objective‑C project, verify the setup with build logs and Instruments, and understand the limits when bridging Core Foundation objects.
When working with huge or infinite collections in Ruby, eager methods build full arrays and can exhaust memory. Ruby’s Enumerator::Lazy defers operations until a terminal call, letting you safely iterate millions of items. This blog shows how to use it, when it pays off, and what pitfalls to avoid.
Learn how Vala eliminates GObject boilerplate and manages memory via ARC, allowing you to write high-level code that compiles to efficient C.