It is known that Canon eliminated RemoteCapture from this camera so direct A/B comparison cannot be made as in the [SX110] thread. However because much has been learned from the SX110 some comparisons will be explored.
Results from your last build ....
The good news ... the 370x260 liveview is excellent and has better resolution than the SX110 in the same viewing mode. Together with +3|4 f-stop dark imaging performance over the SX110 and +6|7 f-stop dark imaging performance over the S70 & S50, I am pleased to announce that CHDKPTP has opened the door to liveview and elevated the S90 as the leading CCD donor for the instrument.
S90 is new to me so it will be some time before I get used to it and test most of the functionality, CHDK side inclusive.
At present with my 2 GHz one-core and USB 1.0 I am getting 1 fps w/o UI and 0.7 fps with UI ON (as opposed to 2.8 fps with the SX110). CPU is under 5% so I think most of that speed degradation is due to the USB 1.0 bottleneck and 640x480 frame transfer.
At the moment there are some gremlins to look at:
a) palette
b) note the horizontal lines in some icons
dump
http://www.sendspace.com/file/kz9wc4A dual partition 8GB SD card is inconvenient for CHDK debugging & updates because I cannot access it from the FILES tab, ie ... requires taking the card out swapping partitions, updating, etc. So a trip to the corner store is planned for this morning to pick up a 4GB card to streamline east coast <-> west coast interaction.
Once up again post I will attempt a palette dump. Please look at this data in the meantime.