tag

#config-sys

3 posts

FreeDOSDeep Dive January 23, 2026 3 min read

The FreeDOS Boot Process: CONFIG.SYS and AUTOEXEC.BAT

How a FreeDOS machine goes from the boot sector to a command prompt, and how CONFIG.SYS and AUTOEXEC.BAT configure everything along the way.

#boot#config-sys#freedos

FreeDOSFix October 30, 2025 3 min read

Fixing 'Out of Environment Space' Errors on FreeDOS

SET commands or a long PATH suddenly fail with 'Out of environment space.' The environment block has a fixed size, and here's how to actually fix it.

#fix#config-sys#freedos

FreeDOSFix October 28, 2025 3 min read

Recovering a FreeDOS System That Won't Boot After a Bad CONFIG.SYS Edit

You edited CONFIG.SYS, rebooted, and now the system hangs or won't load drivers correctly. Here's how to get back to a bootable state without reinstalling.

#fix#config-sys#boot