On Sat, 30 Jul 2005 08:04:08 +0100
Roy Schestowitz <firstname.lastname@example.org> wrote:
> Kevin Nathan wrote:
> > I once wrote an assembler routine to wipe the bubble memory (and/or
> > hard drives) for a military group back when I was still in the
> > Navy. I was never told if it was used, or not, but it took eight
> > hours on a 5 MB hard drive. Since I never actually had access to
> > the boxes with bubble memory, I have no idea how long it took to
> > run on them, but 640KB of main memory took about 20 minutes
> > (4.77MHz clock on an 8088) . . . ;-)
> Judging by the size of the main memory, the machines were probably
Nope, it was an 8088 as I stated. ;-) It had a 10MB hard drive (5 1/4
inch, full bay height!) and a 5MB plugin HardCard.
> with or without a hard-drive which contained no more than 400 MB
> of data.
No, again. It was tested on a 5MB hard drive -- 20MB drives were just
coming out . . .
> So, I guess your algorithm was sufficiently useful. *smile*
If I remember correctly, I wrote all zeroes, then all ones, then all
zeroes again and then wrote out a walking bit pattern sixteen times
(to cycle the pattern twice) and a two bit walk, three bit walk, all
ones, all zeroes, all ones and finished with the bog-standard F6 (0366
octal) . . .
> Anon1: What do you do for a living?
> Anon2: I build houses for people.
> Anon1: And what do _you_ do for a living?
> Anon3: I demolish houses.
> Anon1: Kevin, what did _you_ do for a living?
> Kevin: I help people destroy data.
> Just a joke anyway...
I thought it was cute! ;-)
Kevin Nathan (Arizona, USA)
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