attn mr CHAS : reformat woes

Hi,I should have known better-I tried to reformat & boy did I mess it up!I ended up with “missing operating system”and no idea how to get back…a 3.5 in the drive awards me the message…”non-system disk error,remove and press any key”…to get back to “missing operating system”….pressing the f1 is no doubt laughable at this point,yet cntrl/alt/del does restart…