tag

#tsr

2 posts

FreeDOSHow-To July 10, 2026 2 min read

How to Build a TSR-Aware Batch Menu System on FreeDOS

A complete walkthrough building a batch-file boot menu that correctly manages memory-hungry TSRs — loading only what a chosen task actually needs, freeing conventional memory for everything else.

#howto#batch-files#tsr

FreeDOSDeep Dive February 3, 2026 4 min read

TSR Programs: How DOS Ran Background Tasks Without Multitasking

DOS had no scheduler and no processes in the modern sense — so how did pop-up utilities, mouse drivers, and print spoolers run 'in the background'? By staying resident and hooking interrupts.

#tsr#freedos#dos