How would I read ASCII from a floppy using RAW and display it? (16bit realmode)

In real mode 16 bits you could use int13h BIOS service to read a floppy sector into a memory (check BIOS INT 13h parameters and subfunctions)

IF that sectors contains plain ASCII inforation you could then use a loop and BIOS INT 10h (subfunction 0Eh) services to output that buffer on screen ... one ASCII cahracter at a time...

This is one of the multiple approaches possible

However it might be usefull if you provide more information on what you want and/or need to really do