64bit data 128Bit address...Re: Building a Z-80 (64bit!

From: jpero_at_pop.cgocable.net <(jpero_at_pop.cgocable.net)>
Date: Mon Oct 26 08:23:21 1998

> Date: Mon, 26 Oct 1998 19:41:01 +1
> Reply-to: classiccmp_at_u.washington.edu
> From: "Hans Franke" <franke_at_sbs.de>
> To: "Discussion re-collecting of classic computers" <classiccmp_at_u.washington.edu>
> Subject: Re: 64bit data 128Bit address...Re: Building a Z-80 (64bit!

> >> "Max Eskin" <maxeskin_at_hotmail.com> wrote:

Snip!

> The size isn't the real problem - you already get 16 Gig in less
> than 320 cm^3 (using hard disk technology) which is more than
> 100 Meg per cm^3, which gives us 100x100x100x100 Meg or 100 Tera
> per m^3 (Only heat will be a problem, but if we assume that this
> will shrink by the factor 2 within the next few years, we get
> enough space for cooling without developing a new technology).
> 100 Tera are 100x2^40 Bytes so, for 16 exabytes you need
> 10x2^18 m^3 or 64x64x64x10 m^3 - just the size of a ordinary
> 160 store skyscraper. Nothing real big - isn't it? - and especialy
> not a mountain. and if we assume a increasing density by 10 within
> the next years, it is less than a warehouse.
>
> This is all just (near) todays technology - the real problem
> is the access time .... A wire could come up to 100m between
> a starage device at the perhipherieal area and a 64 Bit computer
> in the middle - 100m thats just 1/3.000.000s or 333ns traveling
> time ... seams we have created some kind of piplineing prior
> to the CPU :) So, calulating a 1 us round trip time, we just
> could runn a 4 MHz Z80 ... hmm didn't he ask for 64 Bit Z80 ?
>
> (I just left the disc acces time out of calculation, but acording
> to any information availabel from disk manufacturers the internal
> caches will eliminate this almost to zero :)
>
> Gruss
> Hans

Not so...

We can have 1 Terabytes now.

Seagate just announced their new drives in 3.5" I think in 50GB.
Use 20 of them and still fit in 1 minicomputer box. And can be run
off the 15A 115VAC or two plus the computer iteslf. :)

Jason D.
email: jpero_at_cgocable.net
Pero, Jason D.
Received on Mon Oct 26 1998 - 08:23:21 GMT