On Tue, Dec 1, 2015 at 5:25 PM, Paul Boddie paul@boddie.org.uk wrote:
On Tuesday 1. December 2015 17.05.31 Luke Kenneth Casson Leighton wrote:
http://rhombus-tech.net/community_ideas/laptop_15in/news/
it's by no means perfect, but i have at least data on-screen. i suspect EM interference is causing the corruption, so another revision of PCB1 will need the LVDS IC layout to be reworked. this is however huge progress. the only 2 parts of PCB1 that need to be checked and debugged are the MicroSD card slot and the 1W speaker/headphone amplifier circuits. the CM108AH USB Audio IC has already been confirmed as operational on the USB bus, as has the GL850G and the 3 USB ports.
Nice work on getting this far, despite the "gothic" font. ;-)
it gets really weird when doing echo "hello" > /dev/tty1 - the on-screen display is rather... garbled. i'll try a 3rd CPU Card later, and/or perhaps set up dual-output (via HDMI) to check that it's not the framebuffer that's corrupted.
Now if only the established players would see sense and support this effort instead of dumping excess stock SoCs into newsagents on the covers of magazines and causing scuffles in the aisles. :-/
yehhh you saw the report a few days ago by Make magazine, which showed that the cost of that $5 board is considerably higher:
"Solving this lack of connectivity makes the cost of owning a Pi Zero increase greatly. It’s not just that you need a USB Wi-Fi dongle, you’d need a powered USB hub to have a Wi-Fi dongle, keyboard, and mouse (it only has one USB slot for peripherals; the other is for power)."
http://makezine.com/2015/11/28/chip-vs-pi-zero/
further down, it shows that the only thing you need to operate the C.H.I.P is a $1 USB cable, to provide power. the alternative board - which is "only" $5 - requires a whopping *$19* of additional components in order to make it actually useful.
l.