DR-DOS Power Management Source Code Rediscovered in Patent.
A missing DR-DOS power management source code has been found in a patent. DR-DOS 6.0 has a built-in feature for putting the CPU in power-saving mode when idle, but it required a customized IDLE driver for each hardware platform to enable power management. No manufacturer ever bothered to develop one, leaving users with no option but to write a driver themselves. A U.S. patent includes dozens of pages of well-documented but poorly-scanned x86 assembly code, including source code for a basic IDLE86.SYS driver, which can be used to create a working IDLE driver.