19 May
2006
19 May
'06
9:58 a.m.
Question on a local newsgroup about PC power supplies and whether the -5V rail
is used any more, and it's prompted me to wonder what it was *ever* used for?
Did the original IBM PC make use of -5V for any reason? Or is its inclusion
maybe a hang-up from earlier machines that used three-rail memory devices?
Far as I know, things that needed -ve rails (like soundcards, serial ports
etc.) all used -12V...
curious.
cheers
Jules