Powershot A3100 - Porting thread - page 8 - DryOS Development - CHDK Forum

Powershot A3100 - Porting thread

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Re: Powershot A3100 - Porting thread
« Reply #70 on: 13 / November / 2012, 22:44:00 »
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My software has to fit in 4kB-16kB, the source can't get very big. The last time i had to use more than 3 files was in the 90's for a computer othello prg..

Re: Powershot A3100 - Porting thread
« Reply #71 on: 13 / November / 2012, 22:52:16 »
My software has to fit in 4kB-16kB, the source can't get very big. The last time i had to use more than 3 files was in the 90's for a computer othello prg..
We used to dream about have 2732's & 2764's instead of the 3 voltage 2708's we were stuck with .... :haha

Meanwhile, I've attached new patch files with fixes for SKIP_AUTOBUILD and corrected PLATFORMID values.
« Last Edit: 13 / November / 2012, 22:58:12 by waterwingz »
Ported :   A1200    SD940   G10    Powershot N    G16

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Offline ahull

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Re: Powershot A3100 - Porting thread
« Reply #72 on: 14 / November / 2012, 12:12:37 »
We used to dream about have 2732's & 2764's instead of the 3 voltage 2708's we were stuck with .... :haha

Ahhh fun days, hours spent UV erasing EPROMS, (Warning: Don't stare into the eraser with your remaining good eye).

...all so we could put the latest magic boot firmware (or hacked up peripheral driver) into some over priced Unix machine that some clown would pour coffee into a week or so later so we could come out and replace the same parts again...  >:(

The other thing I seemed to spend my life replacing in those days were 1488 and 1489 serial line drivers.... soldered onto the PCB naturally. I once managed to set fire to the customer's carpet doing that, fortunately over priced Unix machines were very heavy, and could be heaved conveniently on top of burnt carpet, with little chance that the damage would be discovered till long after I had gone....

Back on topic though, that latest build looks fine, all tests pass, colo(u)rs look ok, carpet is unburnt.     ;)

« Last Edit: 14 / November / 2012, 19:14:35 by ahull »

Re: Powershot A3100 - Porting thread
« Reply #73 on: 14 / November / 2012, 16:40:33 »
I've spent almost 3 hours switching from play to record mode and back comparing the palette and selecting colo(u)rs. I can't get them any better. The only place where you get to see true red, green and blue is in the extended histogram (RGB All and R G B). The other colors are approximations that don't make anything unreadable, and where possible selected also on transparancy (so for instance the histogram doesn't hide most of the live view)
The patches are posted and will appear on the autobuild soon i guess (only the 100d, the 100b is untested)

<edit> just remembered true RGB in histo was also sacrificed for better display in play mode.
« Last Edit: 16 / November / 2012, 14:43:13 by casrap »


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Offline ahull

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Re: Powershot A3100 - Porting thread
« Reply #74 on: 16 / November / 2012, 12:23:32 »
OK, I've done quite a bit of experimenting and testing and I'm more than happy with this. Short and long exposures (>64s) work (I'm going to have a play with that as soon as we get a clear night and I can see some stars). In fact I haven't found anything so far that doesn't work. 

Thanks once again casrap, waterwingz and everyone else involved.
« Last Edit: 16 / November / 2012, 12:26:19 by ahull »

Re: Powershot A3100 - Porting thread
« Reply #75 on: 16 / November / 2012, 17:37:26 »
Good to hear, i didn't notice any strange behaviour either.

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Offline ahull

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Re: Powershot A3100 - Porting thread
« Reply #76 on: 25 / November / 2012, 12:52:54 »
Just had a chance to play with some long exposures, looks fine. Didn't do any formal testing, just shot off a few pictures with CHDK shutter set for 80s,  and the shutter stayed open for a convincingly long time  :)  The A3150 sees quite well in the dark it seems, better than me, thats for sure.

Another 3 exposure HDR, this time of the last of the twilight, shot with the standard CHDK HDR.LUA script (camera (A3150) was sitting on a fence post, so perhaps not absolutely level), and post processed with Luminance HDR.
Tonight  looks like being a good night to for some star trails and moving tail lights (and probably mild hypothermia :P).

« Last Edit: 25 / November / 2012, 12:58:50 by ahull »

Re: Powershot A3100 - Porting thread
« Reply #77 on: 25 / November / 2012, 16:06:39 »
Good luck tonight! If you can then use darkframe substraction to reduce the nasty ampglow. For star trails i would not use that as you would get dotted lines instead of trails ;)


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Offline ahull

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Re: Powershot A3100 - Porting thread
« Reply #78 on: 26 / November / 2012, 16:30:25 »
For the start trails, I was going to use something like this...

http://linuxdarkroom.tassy.net/star-trail-image-stacking/

... however real life got in the way... so it'll have to wait for another night.  :D

If I get any usable results, I'll post them (or a link) here.

Re: Powershot A3100 - Porting thread
« Reply #79 on: 13 / December / 2012, 08:18:52 »
Hi.. What about the 100b version of A3100? I have that one.. Is the build still under construction? I saw that there is an untested bootable sd card version. What about firmware version?
Is there a guide about how to build CHDK for cameras? Is it so difficult? I want to learn about it.

 

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