If you have an old IBM PC with VGA and it’s only 1 pin where the normal is 15pin then don’t panic, it’s possible to change that by removing one pin and then it can connect to 15 pin monitor, you just need to remove it in one end and you have a 14pin to 15pin adapter cable 😉
Seems like one of the purposes for the one pin is that newer vga monitor can report it’s resolution back to the computer so you need to set that manually.
If you are into retro computing and need to copy one of the old floppy .img disks to a diskette then it can be done with dd for unix/linux or by using the windows port of dd
In my case i had 2 computeres with a floppy drive, one was a Windows XP machine and the other was a much older DOS computer without USB or network and i need to test FreeDOS and MS DOS 6.2 but i only had files like disk1.img downloaded from the internet and blank 1.44 floppy disks.
In my first attempt i tried to use a Windows program called winimage but it was not able to run on the old Windows XP, maybe it needed a servicepack or somthing else, so the fastest way was to find a simpler and faster solution and dd came in to my rescue.