Pangtang wrote:Someone asked me for a parts list on my mobile Pi build, so here it is :
Case, Display and DPad/ Buttons :
DC 12V 4800mAh Rechargeable Lithium-ion battery with a power switch,
3.5 inch TFT 640 x 480 LCD Digital Car Rear View Monitor Square (PAL/NTSC),
Black ABS Enclosure 150 x 100 x 60mm,
USB PC SNES Retro gaming controller pad.
Raspberry Pi :
DC to DC Buck Converter 12V to 5V USB 3A 15W Step Down Car Power Supply Module,
USB A 2.0 female to Micro USB B male Connector Adapter.
Amplified Speaker Circuit :
DC to DC Buck Converter 12V to 3.3V 3A 10W Step Down Car Power Supply Module,
3.5mm Mini Portable Stereo Speaker for iPod/iPhone/MP3.
This was a battery powered speaker unit designed to be plugged into a mobile phone
headphone socket, so I removed the unit's battery pack and wired the unit's amplifier
circuit to the 3.3V converter. I then rewired the speakers with some longer cables
so the speakers could be fitted either side of the LCD display. I left the unit power
switch in the ON position so the speakers would be turned on when the console 12V battery
Since space was so limited in the case I had to take many of these components apart
and rebuild them to fit inside the case. An earlier build had heat issues, so the sides of the case
are peppered with ventilation holes.
Nice, but there's already a simpler solution for most people:
I've got an SE on pre-order, they've been delayed a couple of weeks due to a lately found mfg defect, so all the units produced are currently be re-worked...
Not exactly "on cartridge", but I believe that they have plans to eventually have a store... it's still early days and only ~150 SEs will be out in the wild for a while...
The total of the SE is $125 + $10 s&h (US) or $20(elsewhere IIRC). There might be some SEs left for purchase, no idea if the regular version will be the same price or not, so you'd have to contact them for any changes. This is a part time "job" for the main guy running it(he has a day job) so resp. might be slow.
He also sold on the web other handhelds like the Dingoo A-320, A-380, various gemei handhelds, and gamepark holdings handhelds. (I think it was dingoo-digital-usa or something like that, should still be there or it was a few weeks ago when I checked.)
Ingenics JZ4770 SoC based -> 1GHz MIPS arch, ~500MHz GPU, running "opendingux" (a modified version of an alternative linux based OS that we ran on the A-320 and other ingenics SoC based handhelds, e.g. A-380).
That is to say that the A-320 natively ran something call uC OS IIRC(proprietary) and the bootloader was hacked to either boot the native os or "opendingux" when a key was held down on powerup. The A-380 had a hacked up version of dingux(predecessor to opendingux) but a port of opendingux was again managed(not sure if it boots off of SD this time or not as I skipped the A-380 as the 4750 wasn't much of an upgrade over the 4740(A-320) and an extra 32MB of RAM(64MB A-380) was pretty pathetic...)
OS: it's basically the same guys who worked on opendingux for the Dingoo A-320 as I understand it, but I didn't find out about the A-320 until fairly late in it's lifespan. The drawback here is that by this handheld using a MIPS based SoC there will be fewer optimizations that could be backported to the pi, most importantly those involving assembly language optimizations, however the gamepark holdings handhelds(caanoo/wiz/etc.) used ARM9s IIRC and the later models ran a version of linux, so those along with openpandora stuff(watch out for ARMv7 optimizations as it's cortex-a8) are better bases, but I digress...
GCW Zero specs are on the page but additionally from the above, the SEs have 512MB RAM and 16GB onboard flash, while the "regular" versions are (last I heard) supposed to have 256MB RAM and 4GB onboard flash other than that they should be identical.
Also that pricing for the SE was what we earliest adopters paid. I have no idea if he's holding steady at that for everyone or what, and as I mentioned no idea if the "regular" version will get a price break or if we early adopters just got some extra goodies...