IMSAI 8080

From: Hans Franke <franke_at_sbs.de>
Date: Wed Jun 24 05:09:29 1998

>> >So, what to use ? Writable CDs ? They have only a guaranteed
>> I suggest real CD-ROMs

> Do you believe that there will still be working CD-ROM drives in
> 20 or 30 years time? Remember they contain custom chips as well...

Jep, I think there will still be (new) compatible drives
in consumer price range - and I bet that there are for shure
still new drives in the 'professional' price range in 20 years
from now. I don't think the drive is the problem, new medias
are maybe a lot more difficult to aquire - try to buy _new_
_manufactured_ 8" disks - everyting you get as 'new' is at least
6 years old.

> And storage systems change. When was the last time you saw a working
> Syquest 10Mbyte drive (note, the 2 on my shelf don't count, as they need
> minor repairs...)

No, never had one, but what about 10 MB Bernouli Drives from Iomega ?
I still have a unit of two in working condition - now 15 years old.

>> What is the problem with EPROMs? Why not just put them in styrofoam?

> The problem is that the data is held by an electrostatic charge on a
> floating gate in the chip. It's a capacitor, really, and like all
> capacitors it slowly discharges. Now, the time constant may be 10 years
> or 20 years, or whatever, but it's still going to discharge.

? depending on the tecnology.

> And chips - all chips - fail. If (say) the bondout wire on one of the
> data pins falls off, there's no easy way to repair it.

Yes, but a lot less and later than magnetic medias.

> Oh, and putting chips in styrofoam is the quickest way to damage them
> from static. And although the damage may not be noticeable at the time,
> the chip might fail 1 month later, or whatever.

:)

Gruss
H.

--
Ich denke, also bin ich, also gut
HRK
Received on Wed Jun 24 1998 - 05:09:29 BST

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:31:05 BST