IRC logs for #openrisc Friday, 2012-04-20

rbarraudAhhh... morning tea time on a Friday in UK? Bliss :)11:57
rbarrauddoes one drink tea or coffee? Is coffee a thing yet there?11:57
rbarraud'twas a nice Friday here in Auckland11:58
rbarraudbut my VHDL books are in storage... which closes @ 8pm (an hour ago) s ono access til tomorrow11:58
rbarraudwho's off the OSHUG Raspberry Pi meeting coming up?11:59
rbarraudany chance of live streaming? :)11:59
jeremybennettrbarraud: I might be there. Depends whether I can afford to take out a whole afternoon rather than just the evening.12:09
jeremybennettI'll definitely be at the OSHUG meeting in the evening.12:09
juliusb_rbarraud: Hi, sure is morning tea time here.12:38
juliusb_evening beer time there, I suppose?12:38
juliusb_rbarraud: so what's made you interested in the OpenRISC project? what are you thinking of tinkering on?12:40
juliusb_jeremybennett: thanks for the pointers on the TCL stuff for or1ksim - I'm trying to add a test to check the return-code-from-simulated-program functionality in the testsuite12:44
juliusb_will have a proper go at it tonight and submit patches on the weekend for this feature12:44
juliusb_there's a bit of sloppy stuff all over or1ksim, to be honest, regarding how it's exited.12:45
juliusb_there was a lot of sim_done() calls followed by exit() or return statements.12:45
juliusb_as sim_done() calls exit() anyway, they were unnecessary.12:45
juliusb_but taht should be fixed12:45
jeremybennettI noticed that when you put in your first patch. I had to go and look at what the code actually did.12:52
jeremybennettI suspect it represents some historical point at which sim_done was introduced, but not fully integrated across the tool.12:53
rbarraudjuliusb_: indeed - beyond beer o'clock here - just finishing a nice Australian Crown Lager post-dinner (-supper) :)13:02
rbarraudI have been involved with building (electronic co-design, Linux and bootloader porting etc., applications rtc.) embedded Linux boards for 10 years plus ; PXA25x, i.MX2x, i.MX2xx etc.13:04
rbarraudI've interfaced some FPGA's and CPLD's to some of these and enjoyed it. the idea of Soc-inFPGA appeals to me rather a lot.13:05
rbarraudI've been semi-idly following the OpenRISC core(s) for a few years. Interest sparked by jeremybennett's video which I viewed the other day (after watching Lawrence Wilkinson's retro 360/30 FPGA recreation vid :) )13:06
rbarraudI've had too little work the last year or 2 and am interested in sharpening my HDL skills and making some sort of SoC on perhaps a DE0 which I have to hand (also have a NIOS kit if DE0 proves too small).13:08
rbarraudI'm pretty RAM-greedy so may have to move up a few notches :)13:08
jeremybennettLawrence Wilkinson's talk was fantastic. I wish I had time to build such things.13:09
juliusb_I've not seen it.13:09
jeremybennettThe only thing that beats it is this:
rbarraudmost likely will do some SDR with it... DVB-T ('Freeview' here) or perhaps Amateur Radio (1296MHz / 433 / 146 / ? multimode)13:09
rbarraudHave you seen the Magic-1? :)13:10
juliusb_rbarraud: nice call with the Crownie, you have better beer in NZ though, the Monteith stuff isn't bad13:10
juliusb_although, if you can get your hands on it over there, James Squire Golden Ale is good13:10
juliusb_I was just back home in Australia and I have steadily noticed an increase in so-called "craft" beers over the past few years. A pleasing development13:11
jeremybennettI'd not seen Magic-1 before. Quite a device.13:12
rbarraudyes - I am noticing the same trend here lately - as evidenced by the same popping up on Twitter :)13:12
rbarraudOh - the other things I want to play around with are FORTH and LISP machine architectures.13:12
rbarraudsimplicity beckons (S/W wise).13:13
rbarraudwrestling with the naughty bits of N/W init, cross-toolchains, device drivers, ... drove me to think there must be a better way :)13:14
rbarraudso took a detour thru SICP videos (MIT/HP ca.1986) :)13:14
rbarraudThere are a loose group of use here in Auckland who used to work together at a contract assembler (and on one of the PXA255 machines) who have been meeting to watch the vids ... which we did, now it's LISPy but pretty eclectic.13:16
jeremybennettIt would be good to have a LISP machine. You could build a combinator reduction machine if you wanted to go all the way.13:16
rbarraudBeer and Pizza always helps :)13:16
jeremybennettSKIM-1 was built around 1980 for £500.13:17
rbarraudLawrence renews my pride in being a Kiwi :)13:17
jeremybennettSKIM-II was built in the mid-80's using wirewrapped TTL.13:17
rbarraudhadn't hear of that - have mainly been looking at things from a LHS-of-Atlantic POV ;-)13:17
rbarraudis it a British thing?13:17
jeremybennettT.J.W. Clarke, P.J.S. Gladstone, C.D. MacLean, and A.C. Norman. SKIM-The S, K, I13:17
jeremybennettreduction machine. In Proceedings of the 1980 ACM conference on LISP and functional13:17
jeremybennettprogramming, pages 128–135. ACM New York, NY, USA, 1980.13:17
jeremybennettDone at the University of Cambridge13:17
rbarraudACM -- grrrr13:18
rbarraudcan't afford subs; can't afford not to :-/13:18
rbarrauddon't get me started on Elsevier either ... $$%#$%^13:18
rbarraudThanks for the ref13:18
jeremybennettWilliam Stoye's PhD on building SKIM-II is downloadable free:
rbarraudah brilliant - thanks :)13:19
jeremybennettAlso the microprogrammer's guide13:19
jeremybennettIt wasn't TTL I now recall, but bit-slice logic chips. Wire-wrapped though!13:20
rbarraudnice :)13:20
jeremybennettLook forward to seeing you in London next week.13:20
rbarraudby hand presumably? :)13:21
jeremybennettOh yes - I shared an office with him while he was doing it!13:21
rbarraudI wish ... can't afford to renew passport let alone airfare or accomm.13:21
rbarraudCambridge - Luxury! :)13:21
rbarraudMy daughter has been - has a friend doing international law there13:22
rbarraudMy boundaries so far are Timaru, Nadi, Geelong and East Cape :-/13:22
jeremybennettToo bad. It would be good to get OSHUG streamed, but the best we can manage is video recordings. There should be a video of Julius and me last month.13:22
rbarraudWould dearly like to see UK, EU, US and particularly things like the British Science Museum, Smithsonian etc.13:23
jeremybennettAt least with modern comms we can form virtual communities. There are all sorts of people who I work with, who I have never physically met.13:23
rbarraudCanaveral, Silicon Valley highlights ... and all the natural wonders of course13:23
jeremybennettBuild a suitably exciting piece of hardware, then get people to invite you to speak about it and pay your travel costs!13:24
rbarraudyes - I do appreciate that at least :)13:24
rbarraudnow there's a challenge :)13:24
rbarraudsuggestions welcome :)13:24
rbarraudTime machine oughtta do it - or perpetual motion ;-)13:25
jeremybennettMy pet project was to do an OpenRISC Arduino on a DE0-nano. The almost ultimate open source hardware board.13:25
jeremybennettI suppose doing it in TTL would be even more open source.13:25
rbarraudthere is something a bit similar - FPGA on Arduino form factor - ZPUino IIRC13:26
rbarraudrecently announced IIRC13:26
jeremybennettSomeone has beaten me to it :(13:26
rbarraudDiscrete xistors would be even open-er ;-)13:26
rbarraudi think it's a bit of a tiger in a cage --- would have to be processing-intensive / I/O-narrow to make much sense13:27
rbarraudthere just aren't that many pins to go around13:28
rbarraudmind oyu i do tend to think in terms of PC / tablet / phone etc.13:28
rbarraudare you guys on Twitter?13:29
rbarraudI'm @rbarraud13:30
rbarraudI reckon you should stream the Raspberry Pi meeting live thru a Raspberry Pi :)13:31
rbarraudhere's another idea: R/Pi plus FPGA "Shield".... pref with a few GB of DDR3 attached ... superfast swap / fs disk13:32
rbarraud[disclaimer: some or all of the preceding may result from Crown consumption - as juliusb_ will probably verify]13:33
rbarraud...but I've only had 2, honest officer :)13:33
rbarraudBTW the largest thing I have wire-wrapped by hand yet is the Circuit Cellar DDT-51 :)13:34
rbarraudwhich indirectly led me to Linux drivers etc...13:34
rbarraud...a story for another day :)13:34
rbarraudThanks for tolerating my ramblings... perhaps we will meet F2F one day - I hope so.13:35
rbarraudTime for bed here (said Zebedee+1200)13:35
jeremybennettrbarraud. Sleep well. My twitter is @jeremypbennett13:36
rbarraudah thanks13:36
rbarraudi have been known to [near-]sleep-tweet ;-)13:37
rbarraudwill follow you.13:37
stekernspeaking about homebrew computers, this relay computer is built by a guy on a forum I regurarly visit (
stekern(sorry, the address to the forum should have been
jeremybennettQuite a machine. What is is about Swedes and electronics?13:48
jeremybennettI couldn't find how fast it ran. Presumably < 1kHz.13:48
stekernclock is 5-6 Hz according to a post in the forum thread13:52
stekernhe claims it runs about 1 IPS ;)13:53
stekernhere is the thread:
stekernunfortunately you've got to be registered to see the pictures13:54
_franck_this is pretty cool :)17:34
-!- giuseppe is now known as gnu|giuseppe21:59
-!- gnu|giuseppe is now known as giuseppe22:40

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