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1079 discussions

tricky conundrum for the upcoming libre-riscv soc crowdsupply page: image needed
by Luke Kenneth Casson Leighton 12 Nov '18

12 Nov '18

ok so to start the new campaign, an image is needed. not a logo, an *image*. something that "represents" a chip and its potential uses and usefulness in a real and concrete way. the problem is: this is a fabless semi-conductor design... there *is* no chip, there *is* nothing to put out there, and because it's just one component that goes *into* products, there *is* no frickin product either! a confusing jumbled utterly boring montage of hypothetical products would be needed. even more of a conundrum: even putting up a picture of some BGA or QFP packaging isn't ok either, because depending on the final pincount, *AND* on large customer orders, the chip will be *custom packaged* and tailored to their needs (i.e. the same die will have far more interfaces added than there are actual pins, and the die re-packaged to suit the customer's needs, leaving many of the pads disconnected internally or connected internally to other dies). if you look at every single campaign there is a nice "image". it's either the first frame of the video, or it's a really cool-looking shot of a PCB, or a 1in cubic robot: https://www.crowdsupply.com/william-weiler-engineering/skoobot logos are out, although not completely ruled out. if anyone would like to convert the attached to PNG (with a variant placing a circle behind the square) that would be really helpful. so this is the challenge: come up with a suitable place-holder image. l.

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libre-riscv shakti m-class talk
by Luke Kenneth Casson Leighton 02 Nov '18

02 Nov '18

https://www.youtube.com/watch?v=ojeHX33MPSc cool! i didn't realise this was up, until someone kindly pointed it out, today.

1 0

Should we support libre.computer's efforts at promoting lima?
by David Niklas 02 Nov '18

02 Nov '18

Are they even talking about lima? Or are they giving us the wool-over-eyes treatment? https://www.kickstarter.com/projects/librecomputer/la-frite-open-source-fri… Searching.... Nope, I can't find anything for or against lima. Can anyone else find out? I'm going to try and ask them directly, but evidence would be better. Thanks!

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Re: [Arm-netbook] [Campaign Question] USB-C is used more and more...
by lkcl 15 Oct '18

15 Oct '18

[cc'ing arm-netbooks as this question is best answered there, so that other people benefit from it] On Sat, Oct 13, 2018 at 11:32 PM Crowd Supply <orders(a)crowdsupply.com> wrote: > > bonzify(a)airmail.cc submitted a question about your project, "Earth-friendly > EOMA68 Computing Devices": > > USB-C is used more and more often in a day to day basis.Thunderbolt-3, HDMI > ports and new tecnologies are frequently being used more often in the > mainstream market. USB C can intagrate these technologies and also repace the > charging port entirely. How come you didn't use USB C for the EOMA68? there is no such thing as a physical item named "an EOMA68", as it is a standard. the *option* to use USB-3 *is* actually on the EOMA68 standard. USB C is NOT part of the EOMA68 standard, because it would be inappropriate to do so. HOWEVER. implementors of base boards are ENTIRELY AT LIBERTY to add a USB C socket on the base board. AND implementors of Cards are ENTIRELY AT LIBERTY to add a USB C socket on the user-facing end of the Card. the reason why USB C was not included in the EOMA68-A20 - the first in a SERIES of Cards is: massive redesign costs would be required to do so. if you have around USD $20,000 spare, anywhere, i am happy to do another SoC Card, one that uses a PMIC that supports USB-C. l.

8 10

Schedule Updates?
by Paul Boddie 09 Oct '18

09 Oct '18

Hello, I was reviewing the last update on Crowd Supply for the EOMA68 campaign [1], and taking information from that and from discussions on this list, it seems that the following timeline was being followed: 15th June: Crowd Supply update, prototype tested, DRAM tested and ordered, HDMI not tested Late July: DRAM manufactured ("about a month to have the 8 Gbit 1600 MHz DDR3 x8 RAM ICs manufactured"), assembly begins (working from "three months after getting the cards back from assembly before shipping begins") Late October: "delivery of the first units" (presumably "delivery" is the same as "shipping", meaning "dispatch" from Crowd Supply) I hope that things have been proceeding as anticipated. August was a quiet month on this list, and I imagine that Luke has been very busy with all his projects, but I wonder if there is any news about whether the DRAM manufacturer came through, whether assembly could start, whether testing might have begun (and was hopefully a success), and so on. I imagine that there is also the awkward matter of getting the boards from China to the US, related bureaucracy, and other complicating factors. Anyway, I hope everything is going well, that Luke isn't overworked, and that I didn't miss something that would have made the current state of the schedule a bit clearer. Paul [1] https://www.crowdsupply.com/eoma68/micro-desktop/updates/2-7-5-samples-rece…

3 4

apple "security" prevents and prohibits repair...
by Luke Kenneth Casson Leighton 05 Oct '18

05 Oct '18

https://hardware.slashdot.org/story/18/10/05/0142226/apples-new-proprietary… *sigh* and tim cook bless him is talking about privacy... it's as if noone listens to him, even inside apple itself...

3 2

Wikipedia policy change, list might care about
by Jean Flamelle 29 Sep '18

29 Sep '18

I wrote a proposal for a major policy change, which establishes conditions for acceptable conditions to cite a primary or biased secondary source. https://en.wikipedia.org/wiki/Wikipedia:Village_pump_(proposals)#Wikipedia,…. Once in the past, Luke had trouble with a wikipedia article on EOMA that got user-ified, because rigorous news coverage for eoma lacked. Luke definitely noted a little known hypocrisy on wikipedia, which stems from the official policy lagging with the convention on wikipedia on general exceptions to reliability. Since Luke came off as a special interest, perhaps undue scrutiny came about and the rulebook got thrown around a bit. I didn't read to deeply into the conversations back then and I got inspired to write this proposal from my experience learning wikipedia by reading the rules first before editing, noticing many potential caveats, and arguing around the rules too effectively and realizing I would only need to push criticisms and loopholes for probably about a month of pointless back-and-forth on already made points before letting it sink in that otherwise unreliable sources give credible information in this case, for transparent or inferrable reasons. -- CC0

5 8

libre-riscv.org 3d gpu project
by Luke Kenneth Casson Leighton 27 Sep '18

27 Sep '18

long story, there's a new project underway which is to create a 3D GPU (and associated complete processor) entirely as a libre project, using RISC-V as the basis. there's a lot to get done: the roadmap is quite straightforward: http://libre-riscv.org/3d_gpu/roadmap/ it'll be a vulkan3d *software* driver written in rust and using llvm. where and if absolutely strictly necessary intrinsic inline assembler will be placed into the rust code: for the rest it will be straight to llvm, and from there using a hardware-level parallelism API called "SimpleV" which will take care of, at the hardware level, a variable-length "vectorisation" aka variable-size SIMD (which is a really *really* misleading way to describe it but SIMD and vectorisation is what most people know). for the most part this is a *software* project not a hardware one so if anyone has software engineering skills, documentation skills or anything else, do get in touch. mailing lists: http://lists.libre-riscv.org l.

2 4

Microdesktop v1.7
by Richard Wilbur 25 Sep '18

25 Sep '18

By the way, what is the status of the microdesktop design v1.7? Have you already invested in parts (specifically the 2x10 header) and/or circuit boards?

3 13

Oscilloscope or bust?
by David Niklas 23 Sep '18

23 Sep '18

Hi, I need help here. I was designing the power supply of my laptop and I noticed that some power bucks and step up/down converters (Which both seem to do the same thing. Please tell me otherwise.), produced a more stable power supply than others. In order to find out if they are truly suitable for suppling power to sensitive electronics I've heard that I need an oscilloscope. I currently own: 1. #222634543946 "DC-DC 10/12/15/20A 150/250/300/400/1200W Step up Step down Buck Boost Converter" 2. #152710861245 "2A DC Boost Step-up Adjustable Converter Module 3v-24v to 3.3v 5v 6v 9v 12v 24v" After learning that some guy with an oscilloscope reviewed these, I'm planning to get: #122923215542 "6 Pack MP1584EN ultra Small DC-DC 3A power Step-Down Adjustable Module Buck M2H3 6 Pack MP1584EN ultra Small DC-DC 3A power Step-Down Adjustable Module Buck" I've seen many oscilloscopes online on crowd funding campaigns. I've never been certain of which to get, if any. The real professional ones are out of my budget range of about $100. *I'll pay more if I must*, but I already did not anticipate the need to actually evaluate what should be solid products. I probably should find a solid adjustable DC power supply to test these with vs. an old laptop power pack or some batteries. What I need some of these things to do is to take a dynamically variable voltage as input (Li-Ion batteries in series), and produce a constant voltage as output. Others I need to just convert to the correct voltage from the old laptop power pack. Thanks! David

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