> >As I said, almost nothing in a computer uses -12V. It was originally
> needed by
> >DRAM chips for bias, but DRAM has not worked this was for a decade.
> Now, the
> >only thing commonly tied to -12V is an RS-232 port that would probably
> work as
> >well in practice without it.
>
> You are right.. almost nothing.. Just the hard disk and CDROM drives.
> Some hard drive take 2.7 amps starting and about .7 running.
Oops, Mike, I think that you may be confusing the -ve and +ve 12V rails.
The standard 4 pin plugs used for disk drives carry +12V and +5V rails
and two ground returns.
I have never seen a drive _suitable for fitting in a PC_ using other than
+12V and +5V (except some very early 8" drives that used 115/230VAC and
24VDC, as well, but who in their right mind would use one of those in a PC
now!).
Geoff
--
Geoff Blake egsxst.zkffynfe@mari-el.ru linux 2.0.31
Chelmsford wlbqm@nowanet.pl i586
Intel create faster processors - Microsoft create slower processes