Re: segmented mem - Re: Debian Server Compromise -- A Fire Drill ??
hi ya john/paul
On Sun, 7 Dec 2003, Paul Morgan wrote:
> On Sun, 07 Dec 2003 08:15:33 -0600, John Hasler wrote:
> > Paul Morgan writes:
> >> ...but there was no hardware memory management as you suggest until the
> >> 80386.
> > The 80286 had memory management.
> Thanks, John, I wasn't sure, I personally skipped the 80286 :)
some cpu had mmu built in .. some had mmu in a co-processor (mmu) chip
i did most of the whacky mmu chips for 6800 and 80x86 and Z0
and 2900 series cpus ... and all the 1K,2K,4K,16k,64K chips
and 256K was just rolling out when i got out of mmu design
- we had a whole 1MB of dynamic memory when most machines
just had 4-16K of total system memory
- and static memory, comparable to todays memory access
speeds was 1000x too expensive
- nobody liked pagemode back than ... today its nothing but page-mode
- nobody liked cache back than too ... today the bigger the cpu cache
- L1, L2, L3 cache
http://www.Linux-1U.net/CPU/ ( bottom of the page )
-- today's pet project ... dual-screen mplayer ( 1/2 pic on each monitor )
-- -- too much for or maybe not for mplayer ... :-)