As for the purist out there who shudder at the thought
 of adding later components to such a classic, I should
 mention that I'm an astronomer. I don't have the
 systems as collectibles, I use them. Yup, that's
 right... when you're on a budget, you have to make
 everything work. This ol' PC is basically just going
 to serve as a real time clock. 
And a real time clock need a 3.5-inch floppy drive because...?
  With CGA monitors they are good for that... 
Better than an LED digital clock with four-inch tall red digits?