| rbarraud | Ahhh... morning tea time on a Friday in UK? Bliss :) | 11:57 |
|---|---|---|
| rbarraud | does one drink tea or coffee? Is coffee a thing yet there? | 11:57 |
| rbarraud | 'twas a nice Friday here in Auckland | 11:58 |
| rbarraud | but my VHDL books are in storage... which closes @ 8pm (an hour ago) s ono access til tomorrow | 11:58 |
| rbarraud | who's off the OSHUG Raspberry Pi meeting coming up? | 11:59 |
| rbarraud | any chance of live streaming? :) | 11:59 |
| jeremybennett | rbarraud: I might be there. Depends whether I can afford to take out a whole afternoon rather than just the evening. | 12:09 |
| jeremybennett | I'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 testsuite | 12:44 |
| juliusb_ | will have a proper go at it tonight and submit patches on the weekend for this feature | 12:44 |
| 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 fixed | 12:45 |
| jeremybennett | I noticed that when you put in your first patch. I had to go and look at what the code actually did. | 12:52 |
| jeremybennett | I suspect it represents some historical point at which sim_done was introduced, but not fully integrated across the tool. | 12:53 |
| rbarraud | juliusb_: indeed - beyond beer o'clock here - just finishing a nice Australian Crown Lager post-dinner (-supper) :) | 13:02 |
| rbarraud | I 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 |
| rbarraud | I'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 |
| rbarraud | I'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 |
| rbarraud | I'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 |
| rbarraud | I'm pretty RAM-greedy so may have to move up a few notches :) | 13:08 |
| jeremybennett | Lawrence Wilkinson's talk was fantastic. I wish I had time to build such things. | 13:09 |
| juliusb_ | I've not seen it. | 13:09 |
| jeremybennett | The only thing that beats it is this: http://chrisfenton.com/homebrew-cray-1a/ | 13:09 |
| rbarraud | most likely will do some SDR with it... DVB-T ('Freeview' here) or perhaps Amateur Radio (1296MHz / 433 / 146 / ? multimode) | 13:09 |
| rbarraud | Have 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 bad | 13:10 |
| juliusb_ | although, if you can get your hands on it over there, James Squire Golden Ale is good | 13:10 |
| 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 development | 13:11 |
| jeremybennett | I'd not seen Magic-1 before. Quite a device. | 13:12 |
| rbarraud | yes - I am noticing the same trend here lately - as evidenced by the same popping up on Twitter :) | 13:12 |
| rbarraud | Oh - the other things I want to play around with are FORTH and LISP machine architectures. | 13:12 |
| rbarraud | simplicity beckons (S/W wise). | 13:13 |
| rbarraud | wrestling with the naughty bits of N/W init, cross-toolchains, device drivers, ... drove me to think there must be a better way :) | 13:14 |
| rbarraud | so took a detour thru SICP videos (MIT/HP ca.1986) :) | 13:14 |
| rbarraud | There 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 |
| jeremybennett | It 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 |
| rbarraud | Beer and Pizza always helps :) | 13:16 |
| jeremybennett | SKIM-1 was built around 1980 for £500. | 13:17 |
| rbarraud | Lawrence renews my pride in being a Kiwi :) | 13:17 |
| jeremybennett | SKIM-II was built in the mid-80's using wirewrapped TTL. | 13:17 |
| rbarraud | hadn't hear of that - have mainly been looking at things from a LHS-of-Atlantic POV ;-) | 13:17 |
| rbarraud | is it a British thing? | 13:17 |
| jeremybennett | T.J.W. Clarke, P.J.S. Gladstone, C.D. MacLean, and A.C. Norman. SKIM-The S, K, I | 13:17 |
| jeremybennett | reduction machine. In Proceedings of the 1980 ACM conference on LISP and functional | 13:17 |
| jeremybennett | programming, pages 128–135. ACM New York, NY, USA, 1980. | 13:17 |
| jeremybennett | Done at the University of Cambridge | 13:17 |
| rbarraud | ACM -- grrrr | 13:18 |
| rbarraud | can't afford subs; can't afford not to :-/ | 13:18 |
| rbarraud | don't get me started on Elsevier either ... $$%#$%^ | 13:18 |
| rbarraud | Thanks for the ref | 13:18 |
| jeremybennett | William Stoye's PhD on building SKIM-II is downloadable free: http://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-81.html | 13:19 |
| rbarraud | ah brilliant - thanks :) | 13:19 |
| jeremybennett | Also the microprogrammer's guide | 13:19 |
| jeremybennett | http://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-40.html | 13:19 |
| jeremybennett | It wasn't TTL I now recall, but bit-slice logic chips. Wire-wrapped though! | 13:20 |
| rbarraud | nice :) | 13:20 |
| jeremybennett | Look forward to seeing you in London next week. | 13:20 |
| rbarraud | by hand presumably? :) | 13:21 |
| jeremybennett | Oh yes - I shared an office with him while he was doing it! | 13:21 |
| rbarraud | I wish ... can't afford to renew passport let alone airfare or accomm. | 13:21 |
| rbarraud | Wow | 13:21 |
| rbarraud | Cambridge - Luxury! :) | 13:21 |
| rbarraud | My daughter has been - has a friend doing international law there | 13:22 |
| rbarraud | My boundaries so far are Timaru, Nadi, Geelong and East Cape :-/ | 13:22 |
| jeremybennett | Too 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 |
| rbarraud | Would dearly like to see UK, EU, US and particularly things like the British Science Museum, Smithsonian etc. | 13:23 |
| jeremybennett | At 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 |
| rbarraud | Canaveral, Silicon Valley highlights ... and all the natural wonders of course | 13:23 |
| jeremybennett | Build a suitably exciting piece of hardware, then get people to invite you to speak about it and pay your travel costs! | 13:24 |
| rbarraud | yes - I do appreciate that at least :) | 13:24 |
| rbarraud | now there's a challenge :) | 13:24 |
| rbarraud | suggestions welcome :) | 13:24 |
| rbarraud | Time machine oughtta do it - or perpetual motion ;-) | 13:25 |
| jeremybennett | My pet project was to do an OpenRISC Arduino on a DE0-nano. The almost ultimate open source hardware board. | 13:25 |
| jeremybennett | I suppose doing it in TTL would be even more open source. | 13:25 |
| rbarraud | there is something a bit similar - FPGA on Arduino form factor - ZPUino IIRC | 13:26 |
| rbarraud | recently announced IIRC | 13:26 |
| jeremybennett | Someone has beaten me to it :( | 13:26 |
| rbarraud | Discrete xistors would be even open-er ;-) | 13:26 |
| rbarraud | Relays... | 13:26 |
| rbarraud | dooh | 13:26 |
| rbarraud | i think it's a bit of a tiger in a cage --- would have to be processing-intensive / I/O-narrow to make much sense | 13:27 |
| rbarraud | there just aren't that many pins to go around | 13:28 |
| rbarraud | mind oyu i do tend to think in terms of PC / tablet / phone etc. | 13:28 |
| rbarraud | you* | 13:28 |
| rbarraud | are you guys on Twitter? | 13:29 |
| rbarraud | I'm @rbarraud | 13:30 |
| rbarraud | I reckon you should stream the Raspberry Pi meeting live thru a Raspberry Pi :) | 13:31 |
| rbarraud | here's another idea: R/Pi plus FPGA "Shield".... pref with a few GB of DDR3 attached ... superfast swap / fs disk | 13:32 |
| 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 |
| rbarraud | BTW the largest thing I have wire-wrapped by hand yet is the Circuit Cellar DDT-51 :) | 13:34 |
| rbarraud | which indirectly led me to Linux drivers etc... | 13:34 |
| rbarraud | ...a story for another day :) | 13:34 |
| rbarraud | Thanks for tolerating my ramblings... perhaps we will meet F2F one day - I hope so. | 13:35 |
| rbarraud | Time for bed here (said Zebedee+1200) | 13:35 |
| rbarraud | 'nite | 13:35 |
| jeremybennett | rbarraud. Sleep well. My twitter is @jeremypbennett | 13:36 |
| rbarraud | ah thanks | 13:36 |
| rbarraud | i have been known to [near-]sleep-tweet ;-) | 13:37 |
| rbarraud | will follow you. | 13:37 |
| rbarraud | cheers | 13:37 |
| stekern | speaking about homebrew computers, this relay computer is built by a guy on a forum I regurarly visit (elektronikforumet.se): http://www.nablaman.com/relay/ | 13:41 |
| stekern | (sorry, the address to the forum should have been elektronikforumet.com) | 13:42 |
| jeremybennett | Quite a machine. What is is about Swedes and electronics? | 13:48 |
| jeremybennett | I couldn't find how fast it ran. Presumably < 1kHz. | 13:48 |
| stekern | clock is 5-6 Hz according to a post in the forum thread | 13:52 |
| stekern | he claims it runs about 1 IPS ;) | 13:53 |
| stekern | here is the thread: http://elektronikforumet.com/forum/viewtopic.php?f=3&t=44171 | 13:53 |
| stekern | unfortunately you've got to be registered to see the pictures | 13:54 |
| _franck_ | this is pretty cool :) | 17:34 |
| -!- giuseppe is now known as gnu|giuseppe | 21:59 | |
| -!- gnu|giuseppe is now known as giuseppe | 22:40 | |
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