arm-netbook

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1079 discussions

flying squirrel tablet
by Luke Kenneth Casson Leighton 07 Dec '14

07 Dec '14

time for a bit of a rant :) i've been working on the tablet PCB now for... literally months over the past year or more, and i can't quite believe that every time i look at it i find something - yet another thing - that needs fixing or improving. the latest was noticing that NMI# from the tablet's AXP209 wasn't connected to one of the EINTs on the EOMA68 connector, and noticing that 18-pin RGB/TTL with the 8.9in LCD (only 3 lane LVDS) is incompatible with 24-pin RGB/TTL of the 7in LCD (4 lane LVDS). so, goodbye all the resistors for selecting different panels, and then i noticed that the power tracks were crossing the LVDS lines so had to completely reorganise those. i also noticed that the SD/MMC needed moving upwards a bit (so that SDcards could be poked into the case and actually... y'know... lock?), and... ... well, it's just a heck of a lot of detailed work and i'm just... amazed that there's so much to do! oh - one other hilarious thing: i tracked down a company that makes a TI SN75LVDS83b.... the name is *not* texas instruments, it's novatek :) it's the NT7181 and it's literally identical. even the ability to switch TTL levels so that it's 1.8, 2.5 and 3.3v TTL compatible depending on input voltage. anyway it's kiinda fun... l.

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flying squirrel rev 3.1
by Luke Kenneth Casson Leighton 04 Dec '14

04 Dec '14

http://rhombus-tech.net/community_ideas/kde_tablet/news/ so with the micro-desktop and eoma68-a20 underway i'm refining and updating other PCBs such as the flying squirrel PCB and the eoma68-jz4775. the 2nd revision ic3128 PCB should have gone for PCB printing already and assembly in about a week or so's time. just as a reminder i've designed the flying squirrel PCB to accept not one but two LCD panels: the 8.9in 1024x768 LG screen and the 7in 1024x600. l.

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Debian boots in 0.87 seconds
by joem 03 Dec '14

03 Dec '14

Debian boots in 0.87 seconds: http://linuxgizmos.com/headless-arm9-sbc-boots-linux-in-less-than-one-secon… http://www.embeddedarm.com/products/board-detail.php?product=TS-7250-V2 Good if this could be force marched to happen EOMA / Allwinner CPU. A complete world game changer and a lot of funds will get released for dormant projects that need fast boot + linux. Crowd funding world would go beserk :)

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http://rhombus-tech.net/icubecorp/IC1T/news/
by Luke Kenneth Casson Leighton 28 Nov '14

28 Nov '14

ok so lots has happened in the past couple of weeks, firstly thanks to christopher for doing some concept drawings on the micro-desktop dock. turns out that we may have to try something slightly different in order to keep the cost down, chris. we got a prototype back (in MDF laminates), i have some ideas on how it looked and assembled, so i will wait to see what the reaction is, there. the case is what we are waiting for to start the campaign btw. and yes, i really really want it to be wood not plastic. second thing i have been playing with the EOMA68-IC3128 CPU Card - everything works *except* the LAN9514 USB-Ethernet Hub. there are a number of issues, most likely related to unstable power but possibly due to unstable kernel code, and it's simply impossible to tell properly which. so i made a decision to replace the USB-Eth Hub with a GL850G Hub and an MCS7832, because ICubeCorp have tested that combination and we know it properly works. space is *very* tight so it is a bit of a mess. so the revision 1.2 has been done, it now needs review, and then it can go for assembly which is great. i'm not going to push things, so if it's ready when the crowdfunding campaign starts great, if not that's fine we do another campaign separately. also just so people know, one thing we may try is to push the IC3128 to 440mhz (remember it's quad-core so a total of 1.76 ghz of processing power instead of 1.6 ghz), and, also, the whole CPU Card uses only 2.5 watts at 400mhz, which is pretty good for a 55nm SoC. so it is well within the 3.5w margin set for ensuring that no fans or special cooling is needed. l.

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The Hexayurt Project: Free Hardware housing for the world
by Alexander Stephen Thomas Ross 25 Nov '14

25 Nov '14

heres a surprisingly related talk: don't get caught on the title. lots of food for thought for this project. http://files.howtolivewiki.com/d3-t1-03-20130802-1300-one_network_one_world… from: http://hexayurt.com/

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Talk - Eben Moglen - Free and Open Software: Paradigm for a New Intellectual Commons
by Alexander Stephen Thomas Ross 17 Nov '14

17 Nov '14

https://www.youtube.com/watch?v=tbcy_ZxXLl8&html5=1 I felt this was quite relevant.

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IC3128 1280x800 60fps confirmed
by Luke Kenneth Casson Leighton 11 Nov '14

11 Nov '14

http://rhombus-tech.net/icubecorp/IC1T/news/ ok, it's kinda cheating, as it's only 8 bits per pixel, but i managed to get a stable image at 1280x800 resolution, 60fps, on the micro-desktop base. yet to be determined is what's actually the limiting factor - i'm working with ICubeCorp to find out - it's either that the DDR3x16 RAM IC (which is actually a 1600mhz samsung x16 DDR3 chip) is being clocked at only 266mhz or that there is an internal bus which can't get memory fast enough when reading the current scan line/pixel at the framebuffer's memory.location.. all kinda fascinating. what i am speculating is that this 55nm chip could actually be run much faster than the reported 400mhz speed. a processor in 55nm theoretically should be able to achieve 600mhz comfortably, possibly even 800 and maybe 900 with a bit of luck. however that's a huge jump in power requirements and i don't think the power in (pins) have been designed to cope with that. so... we shall see :) l.

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crowd-funding landing page is up!
by Luke Kenneth Casson Leighton 06 Nov '14

06 Nov '14

https://www.crowdsupply.com/eoma68/micro-desktop hooraay :) just a sign-up page for now. demo cpu card arrived yesterday.

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microdesktop and eoma68-a20 upcoming crowd-funding campaign starts 5th nov 2014
by Luke Kenneth Casson Leighton 03 Nov '14

03 Nov '14

i've reworded the main web site after (thank you phil!) seeing simon sinek's ted talk, to answer the question "why" as the top priority. it's the same "why" that captivated everyone's attention (900,000 supporters and a reach of 380 *million* people) on phonebloks.com. q: why does this project exist at all? a: to reduce the e-waste and environmental impact of mass-volume consumer electronics. [in fact the clue is in the word "consumer" that there is something desperately wrong with the current approach]. your help in getting the message across much appreciated. crowd-funding campaigns work by having people put out the word, but it would appear, from simon sinek's talk, that you have to get the word across about WHY you are doing something as the first absolute top priority, then HOW and only then finally WHAT. any company or campaign that starts purely with WHAT, is extremely unlikely to succeed. the motivation is unknown, so how can any salesman sell something if they don't know *why* they're selling it? so please, help get the word out when the campaign starts: the project exists to reduce the environmental impact of computers. it's as simple as that. l.

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Re: [Arm-netbook] Linux on Lenovo A10
by jean-michel voicechat_fan 01 Nov '14

01 Nov '14

what is wrong on my post i dont see it on archives 2014-10-31 8:18 GMT+08:00 jean-michel voicechat_fan < jean.michel.78(a)gmail.com>: > hello arm netbook users , i own a lenovo A1O netbook > it is a RK3188 based one i am looking for informations or image to boot a > linux on this machine. > I have rooted this machine and install CWM recovery that means i can also > run linux on this way > > i can give you information more > i try to read informations for not mounted partitions but i dont succeed > to mount boot partition > here my /proc/mtd > dev: size erasesize name > mtd0: 00400000 00004000 "misc" > mtd1: 00800000 00004000 "kernel" > mtd2: 01000000 00004000 "boot" > mtd3: 02000000 00004000 "recovery" > mtd4: 04000000 00004000 "backup" > mtd5: 08000000 00004000 "cache" > mtd6: 40000000 00004000 "userdata" > mtd7: 00400000 00004000 "kpanic" > > thanks you by advance > sorry for my english > > > -- > web <http://jeanmichel.gens.free.fr> > > -- web <http://jeanmichel.gens.free.fr>

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