SX100 IS - page 17 - Firmware Dumping - CHDK Forum
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SX100 IS

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Offline Hacki

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  • EOS 80D
Re: SX100 IS
« Reply #160 on: 11 / July / 2008, 12:33:42 »
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nr. 2 changes from 3f3f3f36 to 3b3f3f36
Nothing else changes.

Complete list, in case its important:

1:  40800d
2: 3f3f3f36
3:  400000
4:          0
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Offline ewavr

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Re: SX100 IS
« Reply #161 on: 11 / July / 2008, 12:38:12 »
0x3f3f3f36 - 0x3b3f3f36 = 0x04000000

In kbd.c change to:

#define KEYS_MASK1 (0x171F0300)
and
{ 1, KEY_DISPLAY  , 0x04000000 },

« Last Edit: 11 / July / 2008, 12:41:49 by ewavr »
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Offline Hacki

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Re: SX100 IS
« Reply #162 on: 11 / July / 2008, 12:56:00 »
Works now for me, thanks.
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Offline bether

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  • SX100 IS
Re: SX100 IS
« Reply #163 on: 11 / July / 2008, 14:46:31 »
Override ISO value works oddly a bit.
I can't get brighter image than this I get by  normal high value (ISO 1600) from camera.
I set higher ISO e.g. 2600 or 3200 but it only show in exif not brighter image.
so has it to be? Is this the limitation camera?
« Last Edit: 11 / July / 2008, 14:48:46 by bether »
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Offline LjL

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Re: SX100 IS
« Reply #164 on: 11 / July / 2008, 17:39:37 »
On my A720, that happens if I select ISO speeds greater than 2400. Try increasing incrementally from 1600 until it stops brightening anything.

And remember that, on these cameras, ISO > 1600 is done purely digitally, so you might as well do it in post-processing, at least when shooting raw.
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Offline Hacki

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Re: SX100 IS
« Reply #165 on: 11 / July / 2008, 19:44:02 »
I did some testing,

ISO apparently goes down to 50 (Took a series of pictures with iso bracketing, the histogramm stopped changing under iso 50), but does not seem to go over 1600. (besides, which purpose would that serve? The noise at 1600 already looks really nasty)

Aperture override goes from 2.77 to 11, full zoomed in from 3,5 to - what i believe - actually F16.
Though the exif data goes only up to F11, the image keeps getting darker for 4 steps, and that would make F16. (F11.31, F12.69, F14.25, F16.00).

As i wrote earlier, the shutter is going to get benchmarked as soon as i find a laser pointer. That would be.. probably tomorrow or monday. cant wait to construct what i have in mind.  :)

I'd be interested in tinkering myself a power supply together, does someone know the polarity of the ACK-800 plug?

Regards, and again thanks to flar & ewavr!
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Offline liquid2000

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Re: SX100 IS
« Reply #166 on: 11 / July / 2008, 20:18:02 »
2 Very Hard Nights :)
SX100 IS 1.00B
sx100is 100b.zip - 0.10MB

based on 439

It's working.
I'm a newbie and I'm not a progammer :) plese check my files. I've made changes only in 2 or 3 files (boot.c, capt_seq.c). Plese check it.
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Offline Newstech

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Re: SX100 IS
« Reply #167 on: 11 / July / 2008, 21:03:56 »
Quote from: ewavr on 11 / July / 2008, 11:10:08
@ In G7 shutter speed/aperture value also contolled via jogdial. There is special ubasic commands "wheel_right" and "wheel_left", but I don't remeber, that someone has used them  ;).
You need these commands on SX100IS?

Yes.  I tried "wheel_right" and "wheel_left" but they did nothing.  Looks like to make them work, JogDial_CW and JogDial_CCW need to be defined.  If we had the wheel commands, then the various bracketing scripts could work.
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Offline BB

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Re: SX100 IS
« Reply #168 on: 11 / July / 2008, 22:46:13 »
Actually, Hiker_Jon did some testing with a A720IS and found that when reviewing the RAW file, that ISO 800 and ISO 1600 produce identical RAW image files... That the camera was just using math to brighten the RAW file into JPEG:

in-camera EV+1

And some interesting information about in-camera JPEG processing.

Canon noise reduction

-Bill
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Offline pepeloloz

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Re: SX100 IS
« Reply #169 on: 11 / July / 2008, 23:22:43 »
Quote from: liquid2000 on 11 / July / 2008, 20:18:02
2 Very Hard Nights :)
SX100 IS 1.00B
sx100is 100b.zip - 0.10MB

based on 439

It's working.
I'm a newbie and I'm not a progammer :) plese check my files. I've made changes only in 2 or 3 files (boot.c, capt_seq.c). Plese check it.
good to know that some1 is working on this version of the firmware ;)
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