# MS-DOS An operating system from Microsoft that runs on early x86 era PCs. There were multiple flavors of DOS, but MS-DOS was the big one. * [[:ibm_pc:open_watcom|Open Watcom]] ## How-Tos ### Mount difficult floppy images in DOSBox-X If you can't mount a floppy image, try setting **Option: mount images read-only** ### Change the text mode in DOSBox-X In `Z:TEXTUTIL` there are COM files you can run to change the text size. ## Reference ### DOS SDK An SDK for DOS programs that lets you skip low level programming. * https://github.com/Scalibq/DOS_SDK