<lekernel>
I don't know about your build error ... works for me... are you using clang/llvm from the milkymist github?
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<Jia>
lekernel: I'll read your code when I get home:)
* Jia
are confused about the lm32-gcc bug
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<kristianpaul>
lekernel: had you used amber?
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<Jia>
lekernel: your last commit is "Mico32 -> LM32", may you give me more detils?
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<lekernel>
Jia: there are others. this one is just to match the cpu name from binutils.
<lekernel>
kristianpaul: no
<lekernel>
what's Amber?
<kristianpaul>
check opencores
<larsc>
amba?
<kristianpaul>
free of arm patents they claim so far it called my antetion
<kristianpaul>
afaik no mmu
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<azonenberg>
kristianpaul: open source ARM core?
<azonenberg>
i'm sticking to mips since its a nice old architecture
<azonenberg>
all patents on mips1 have long since expired
<kristianpaul>
azonenberg: kinda yes, old arch same as your mips core
<azonenberg>
Well yeah, all the current ones are patented up the wazoo
<wpwrak>
kristianpaul: 40 MHz on a Spartan 6 45T ...
<wpwrak>
kristianpaul: (page 45 of the PDF) 80 MHz on a virtex
<azonenberg>
wpwrak: 40 MHz on an ARM core on s6?
<azonenberg>
even my MIPS hits 80, do they have significantly better performance per clock?
<azonenberg>
half the clock rate would need a much more efficient architecture to be competitive
<kristianpaul>
wpwrak: need to verify that without the ddr3 controller from xilinx
<lekernel>
azonenberg: can you deposit titanium films (on a KTN crystal)?
<azonenberg>
In house, or do i hav access to it?
<azonenberg>
In house the only film coating i can do is spin coating, i plan to build a sputtering setup but don't have the parts yet
<azonenberg>
i can however do evaporation on campus
<wpwrak>
azonenberg: they only compare it with itself. so no idea how it compares with other cores in real life. 1.0 MIPS/MHz suggests they're not ~2x faster than the rest of the pack (which they'd need to make up for the low clock speed)
<azonenberg>
So it should be possible to get hot enough
<lekernel>
after reading up, it's a little more complicated than what I thought
<lekernel>
first those KTN crystals are expensive as hell
<azonenberg>
The tool cannot get hot enough to do Pt (1768, 3285)
<azonenberg>
3825*
<azonenberg>
vapor pressure is too low
<azonenberg>
and hmm...
<lekernel>
then, I read mentions of the crystal lattice orientation, but they are contradictory. so I should actually find a way to make failures less expensive. I know a crystal processing workshop in Berlin, maybe I'll order a boule and process it locally
<azonenberg>
lol nice
<azonenberg>
wpwrak: 1.0 MIPS/MHz is comparable to my architecture
<azonenberg>
maybe eve na little worse if they're talking DMIPS
<azonenberg>
and i clock twice as fast
<azonenberg>
no experience with LM32 but i'v eheard its comparable to a hair faster than mine
<lekernel>
and finally, the electrodes. seems you need more than just an electric field - you need an ohmic junction to inject some electrons into the crystal. and the way to do that is to deposit titanium on a polished face.
<azonenberg>
I see
<azonenberg>
well, sputtering it shouldnt be too difficult
<lekernel>
so, except those three "little" problems, it seems like a cool technology :-)
<azonenberg>
i havent built a sputtering system yet, its the third on my TODO list
<azonenberg>
the first two being a better spin coater and a 2-inch contact mask aligner
<mumptai>
a DIY foundry?
<azonenberg>
mumptai: #homecmos
<azonenberg>
its coming along slow since i'm doing it part time while in school
<azonenberg>
but it is moving
<lekernel>
azonenberg: so, titanium sputtering sounds like something you would be capable of doing?
<azonenberg>
Am currently capable of, no. Will be at some point, yes
<mumptai>
cool
<azonenberg>
how long it'll take depends on a lot of factors
<lekernel>
well, using tools on the campus. get it done, no matter how ;-)
<azonenberg>
If i can evaporate it, i can do it easily
<lekernel>
induction heating should be possible, no?
<azonenberg>
evaporation is done with a tungsten filament
<lekernel>
ah, I see... old school
<azonenberg>
the hard part is getting the necessary vacuum
<azonenberg>
1E-6 torr range
<lekernel>
does it really need to be that perfect?
<azonenberg>
Yes
<azonenberg>
Sputtering can be done much hgiher
<lekernel>
or else?
<azonenberg>
1E-3 to 1E-2
<azonenberg>
You get oxidation etc
<azonenberg>
sputtering is done with an inert gas plasma at low temperature
<wpwrak>
azonenberg: (MIPS) yes, DMIPS. so it sounds like a nice achievement in terms of proof of concept. but it doesn't quite feel as if they had just obsoleted what we have.