On Wed, May 27, 2026 at 1:56 PM Sabina Zelená. via Freedos-user <[email protected]> wrote: > > Greetings. > > I am using DOS(both,FreeDOS & MS-DOS) also on various semi-modern > laptops,thin clients,etc.,mostly with Intel Atom CPU. > > I wish to lower CPU frequency,while in DOS(i have usually multiboots > with Windows) to conserve power & reduce heat stress from CPU. > > It is nonsense to let run CPU @ 1.6GHz,while in DOS,i would wish to > lower the frequency to 100MHz for DOS,i heard about CPU Throttle,is > it stable/safe? > > Has some1 real experiences? > > Has it some dangers? > > What is the right configuration(ideally Config & Autoexec examples)?
Are you running FDAPM? If you use FDAPM /APMDOS this should do what you want: :: C:\>fdapm /? :: Usage: Give FDAPM any one option from the following list. :: Case is irrelevant, - or / are optional. HELP or /? shows this help. :: This is free open source GPL 2 software. :: Written and conceived by Eric Auer. Version: 11 Sep 2009. :: :: INFO / STATS - show information about APM status / APMdos :: APMdos - keep FDAPM in RAM, save most energy. To stop, select APMbios/APMoff :: APMbios / APMoff - turn plain BIOS APM energy saving mode on / off :: :: SPINUP / SPINDOWN - wake up IDE disks / flush caches and stop IDE disks :: VGAoff / VGAon - turn EGA/VGA/VESA DPMS screen off (no auto wake up!) / on :: FLUSH / ZapStats - flush caches / clear STATS counters :: SPEEDn - set CPU speed to n/8 of max. (0 halts until 'power' pressed). :: ACPIDUMP - show ACPI data tables (to debug SPEEDn, stand-by, power off, etc) :: STANDBY - flush caches, enter stand-by mode :: SUSPEND - flush caches, stop (will auto wake up) IDE disks, suspend PC :: POWEROFF - flush caches, stop IDE disks, power off VGA and PC :: PURESUSP / PUREOFF - as SUSPEND / POWEROFF but does not stop IDE disks first :: :: COLDboot / WARMboot - do a reboot with / without BIOS tests (POST) :: HOTboot - try fast int 19h reboot (will often crash!) > > For example my Intel Atom laptop Asus Eee PC 901 can run on battery > for 4 hrs.,when running Windows 7 Super Lite,but when running > DOS(regardless,which,i have both,MS-DOS 6.22 & FreeDOS 1.3 on it),battery > is dead within 1.5hrs. > > & can it be also used in MS-DOS,or it is exclusively for FreeDOS? You mentioned you're using FreeDOS 1.3. This is a very old (2022) version of FreeDOS. I encourage you to upgrade to FreeDOS 1.4 (2025). You might also try the monthly test releases, which (as you might guess) are updated every month. The next test release should be available in a few days, around June 1. https://www.freedos.org/download/ _______________________________________________ Freedos-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freedos-user
