The end of stubs_entry_2.S for the SX10 ports should read:
// null sub - point these at nullsub_1 as labelled in IDA
NHSTUB(kbd_pwr_off, 0xFF81093C)
NHSTUB(kbd_pwr_on, 0xFF81093C)
NHSTUB(Mount_FileSystem, 0xFF81093C)
NHSTUB(Unmount_FileSystem, 0xFF81093C)
NHSTUB(SetZoomActuatorSpeedPercent, 0xFF81093C)
NHSTUB(rewinddir, 0xFF81093C)
I've checked this on 1.01A and 1.02B - the same address works. I'm guessing the rest are the same.
I've added the 781 trunk recompiled binaries here at
http://drop.io/wltyjxnThe 781 trunk patch file is here
http://drop.io/wltyjxn/asset/nullsub-fix-patchThis script is my test case:
http://chdk.wikia.com/wiki/UBASIC/Scripts:_Zoom_Shoot