S90 Porting Thread

drewm1980

Unfortunately, the porting process has stalled, waiting for someone to come along who wants to and is able to actually disassemble the firmware, find the entry points to functions, figure out what they do, and write C code to call them from CHDK.

battika

Hello, just started following the process described here http://chdk.wikia.com/wiki/Adding_support_for_a_new_camera and also had a look at the G11 CHDK port thread.

I managed to get to the point where the compiler is not complaining about any unreferenced symbols. The automatically generated stubs_entry.S file very much reminds me of G11's stubs_entry file. As you can see below the same stubs were found with the same probability:

S90's stubs_entry.S file

// !!! THIS FILE IS GENERATED. DO NOT EDIT. !!!
#include "stubs_asm.h"

NSTUB(AllocateMemory, 0xffa9d16😎
NSTUB(AllocateUncacheableMemory, 0xff838dcc)
NSTUB(Close, 0xff835414)
NSTUB(CreateTask, 0xff81e5b4)
NSTUB(DeleteFile_Fut, 0xff834da0)
// ERROR: EnterToCompensationEVF is not found!
NSTUB(ExecuteEventProcedure, 0xff888d74)
// ERROR: ExitFromCompensationEVF is not found!
// Best match: 57%
NSTUB(ExitTask, 0xff81e844)
NSTUB(Fclose_Fut, 0xff834f1c)
NSTUB(Feof_Fut, 0xff83510😎
NSTUB(Fflush_Fut, 0xff835144)
NSTUB(Fgets_Fut, 0xff835070)
NSTUB(Fopen_Fut, 0xff834edc)
NSTUB(Fread_Fut, 0xff834fc😎
NSTUB(FreeMemory, 0xffa9d160)
// Best match: 91%
NSTUB(FreeUncacheableMemory, 0xff838e0c)
NSTUB(Fseek_Fut, 0xff8350bc)
NSTUB(Fwrite_Fut, 0xff83501c)
// Best match: 52%
NSTUB(GetBatteryTemperature, 0xff8615f0)
// Best match: 52%
NSTUB(GetCCDTemperature, 0xff86157c)
// Best match: 85%
NSTUB(GetCurrentAvValue, 0xff95a354)
NSTUB(GetDrive_ClusterSize, 0xff86e380)
NSTUB(GetDrive_FreeClusters, 0xff86e3e0)
NSTUB(GetDrive_TotalClusters, 0xff86e3b4)
// Best match: 64%
NSTUB(GetFocusLensSubjectDistance, 0xff95892😎
NSTUB(GetFocusLensSubjectDistanceFromLens, 0xff958d70)
// Best match: 96%
NSTUB(GetOpticalTemperature, 0xff861664)
// Best match: 66%
NSTUB(GetParameterData, 0xff994a7c)
// Best match: 72%
NSTUB(GetPropertyCase, 0xff88ca64)
// Best match: 96%
NSTUB(GetSystemTime, 0xffa9d1c0)
// Best match: 74%
NSTUB(GetZoomLensCurrentPoint, 0xff95d9ec)
NSTUB(GetZoomLensCurrentPosition, 0xffa90e0c)
// Best match: 64%
NSTUB(IsStrobeChargeCompleted, 0xff8d8710)
NSTUB(LocalTime, 0xff886670)
// Best match: 93%
NSTUB(LockMainPower, 0xff89467c)
// ERROR: Lseek is not found!
// Best match: 92%
NSTUB(MakeDirectory_Fut, 0xff834e14)
// Best match: 57%
NSTUB(MoveFocusLensToDistance, 0xffafbcf0)
// Best match: 58%
NSTUB(MoveZoomLensWithPoint, 0xffa9b1a😎
// Best match: 62%
NSTUB(NewTaskShell, 0xff88c510)
NSTUB(Open, 0xff8353bc)
// ERROR: PT_PlaySound is not found!
// Best match: 86%
NSTUB(PostLogicalEventForNotPowerType, 0xff8924a😎
// Best match: 92%
NSTUB(PostLogicalEventToUI, 0xff8924f4)
NSTUB(Read, 0xff81ab7😎
NSTUB(ReadFastDir, 0xffa7d74😎
// ERROR: RefreshPhysicalScreen is not found!
// ERROR: Remove is not found!
// Best match: 53%
NSTUB(RenameFile_Fut, 0xff834ed😎
// ALT: NSTUB(RenameFile_Fut, 0xffa69a44) // 8/7
// ALT: NSTUB(RenameFile_Fut, 0xffa69a94) // 8/7
// Best match: 93%
NSTUB(SetAutoShutdownTime, 0xff8946f0)
// Best match: 81%
NSTUB(SetCurrentCaptureModeType, 0xff89b7b4)
// Best match: 55%
NSTUB(SetFileTimeStamp, 0xff9496e😎
// Best match: 64%
NSTUB(SetLogicalEventActive, 0xff8943cc)
// Best match: 68%
NSTUB(SetParameterData, 0xff99495😎
// Best match: 89%
NSTUB(SetPropertyCase, 0xff88c960)
// Best match: 92%
NSTUB(SleepTask, 0xff838a50)
// Best match: 60%
NSTUB(TakeSemaphore, 0xff83871😎
// ERROR: TurnOffBackLight is not found!
// ERROR: TurnOnBackLight is not found!
// ERROR: UIFS_WriteFirmInfoToFile is not found!
// Best match: 93%
NSTUB(UnlockMainPower, 0xff8945d0)
NSTUB(UpdateMBROnFlash, 0xff813f74)
NSTUB(VbattGet, 0xff831e04)
NSTUB(Write, 0xff8354a4)
NSTUB(_log, 0xffb365f😎
NSTUB(_log10, 0xffb35284)
NSTUB(_pow, 0xffb353f4)
NSTUB(_sqrt, 0xffb3819c)
NSTUB(close, 0xff81a990)
NSTUB(closedir, 0xffa7d5d0)
// Best match: 71%
NSTUB(closefastdir, 0xffa7d8e4)
// Best match: 95%
NSTUB(free, 0xff81413😎
// Best match: 86%
NSTUB(kbd_p1_f, 0xff833630)
// Best match: 86%
NSTUB(kbd_p1_f_cont, 0xff83363c)
NSTUB(kbd_p2_f, 0xff832ed😎
// ERROR: kbd_pwr_off is not found!
// ERROR: kbd_pwr_on is not found!
NSTUB(kbd_read_keys, 0xff8335b4)
// Best match: 81%
NSTUB(kbd_read_keys_r2, 0xff85db5c)
NSTUB(lseek, 0xff835530)
NSTUB(malloc, 0xff8140dc)
NSTUB(memcmp, 0xff8203e😎
NSTUB(memcpy, 0xff83e43c)
NSTUB(memset, 0xffa0c7f😎
NSTUB(mkdir, 0xff83588😎
NSTUB(mktime_ext, 0xff8ac304)
NSTUB(open, 0xff81a8e0)
NSTUB(opendir, 0xffa7d614)
// ERROR: openfastdir is not found!
NSTUB(qsort, 0xffaec3d😎
// Best match: 95%
NSTUB(rand, 0xff8204f0)
NSTUB(read, 0xff81ab7😎
// ERROR: readfastdir is not found!
// ERROR: rename is not found!
// Best match: 95%
NSTUB(srand, 0xff8204e4)
NSTUB(stat, 0xff83556c)
// ALT: NSTUB(stat, 0xff86b7c4) // 30/0
// Best match: 61%
NSTUB(strcat, 0xff813f3😎
// Best match: 56%
NSTUB(strchr, 0xff813fc0)
NSTUB(strcmp, 0xff8203a4)
NSTUB(strcpy, 0xff82038c)
NSTUB(strftime, 0xff8abd0c)
NSTUB(strlen, 0xff81400c)
NSTUB(strncmp, 0xff813f74)
// Best match: 73%
NSTUB(strncpy, 0xff813f3😎
// Best match: 71%
NSTUB(strrchr, 0xff83e414)
// ALT: NSTUB(strrchr, 0xff8abad4) // 18/8
// Best match: 96%
NSTUB(strtol, 0xff83e71c)
NSTUB(strtolx, 0xff83e520)
// Best match: 86%
NSTUB(time, 0xff886be😎
NSTUB(vsprintf, 0xff820350)
NSTUB(write, 0xff81abd😎

And the same stubs are missing so I added them to stubs_entry_2.S. Hope that someone with ARM ASM knowledge can fill in the gaps:

S90's stubs_entry_2.S file

#include "stubs_asm.h"

// Not found by sigfind
NHSTUB(EnterToCompensationEVF, 0x1234567😎
NHSTUB(ExitFromCompensationEVF, 0x1234567😎
NHSTUB(Lseek, 0xff835530) // same as lseek
NHSTUB(PT_PlaySound, 0x1234567😎
NHSTUB(RefreshPhysicalScreen, 0x1234567😎
NHSTUB(Remove, 0x1234567😎
NHSTUB(TurnOffBackLight, 0x1234567😎
NHSTUB(TurnOnBackLight, 0x1234567😎
NHSTUB(UIFS_WriteFirmInfoToFile, 0x1234567😎
NHSTUB(kbd_pwr_off, 0x1234567😎
NHSTUB(kbd_pwr_on, 0x1234567😎
NHSTUB(openfastdir, 0x1234567😎
NHSTUB(readfastdir, 0x1234567😎
NHSTUB(rename, 0x1234567😎

// defined elsewhere
NHSTUB(SetScriptMode, 0x1234567😎
NHSTUB(apex2us, 0x1234567😎
NHSTUB(MakeAFScan, 0x1234567😎
NHSTUB(ExpCtrlTool_StartContiAE, 0x1234567😎
NHSTUB(WriteSDCard, 0x1234567😎
NHSTUB(UnlockAF, 0x1234567😎
NHSTUB(DoAFLock, 0x1234567😎
NHSTUB(GetKbdState, 0x1234567😎
NHSTUB(UnsetZoomForMovie, 0x1234567😎
NHSTUB(LEDDrive, 0x1234567😎
NHSTUB(ScreenLock, 0x1234567😎
NHSTUB(ScreenUnlock, 0x1234567😎


// nullsubs (as defined in G11's stubs file)
NHSTUB(rewinddirkbd_pwr_on, 0x1234567😎  // nullsub
NHSTUB(Unmount_FileSystem, 0x1234567😎  // nullsub
NHSTUB(Mount_FileSystem, 0x1234567😎  // nullsub
NHSTUB(SetZoomActuatorSpeedPercent, 0x1234567😎  // nullsub

So I assume that someone with C and ASM knowledge could make a successful S90 CHDK port based on the G11 project.

CanonAddict

Good news, thanks drewm1980 and battika.

I don't care that much about HD Video, but using CHDK for the S90 would be awesome.

battika

Yeah, I guess we should forget about HD Video on S90/G11 due to hardware limitation.

Anyways, here is my makefile.inc, not sure if my [tt]MEMISOSTART[/tt] value is correct given I have never seen ARM ASM code before. My test project compiles Okay, all I need is a card reader so that I can transfer [tt]DISKBOOT.BIN[/tt] to my SD card 😀

S90's makefile.inc

#31E1
PLATFORMID=12769

PLATFORMOS=dryos

MEMBASEADDR=0x1900
RESTARTSTART=0x50000
MEMISOSTART=0x141DBC
ROMBASEADDR=0xff810000
NEED_ENCODED_DISKBOOT=3

PLFLAGS=-DMEMBASEADDR=$(MEMBASEADDR) -DMEMISOSTART=$(MEMISOSTART) -DMEMISOSIZE=$(MEMISOSIZE)
PLFLAGS+=-DRESTARTSTART=$(RESTARTSTART)

KEYSYS=d4

ERR99

MEMISO start looks correct for S90.
But please dont forget to update also the ASM code. Even if the G11 asm-code looks similar to the S90 bootcode, it is not 100% the same. I have taken a quick look on the S90 Firmware and i found allready some different sub_function adresses in boot.c code. So it is absolutly necessary to update the complete ASM code, the G11 ASM code will not work for this port. If you try to build the G11 Port, only with makefile.inc and stubs_entry2.s adapted, the diskboot.bin will not work and the camera crashes direct during startup.
But hopefully the G11 port is a little help for your porting work. 😉

battika

Thanks ERR99 for your suggestions, I will have a look into the boot code shortly. I'm very new to this porting process and your efforts with the G11 port has helped me a lot. You made a terrific job there.

Microfunguy

I think ERR99 could be of very great help to you after his very recent good G11 work.

No-one has ever spelled-out every single step of the porting process.

Maybe you could as you go along ?

David

rachelkitty

drewm1980
Unfortunately, the porting process has stalled, waiting for someone to come along who wants to and is able to actually disassemble the firmware, find the entry points to functions, figure out what they do, and write C code to call them from CHDK.

Yes, due to the fact that there are other pressures on my time atm. I'll be getting back to it soon. i have most of the stubs and so on sorted from previously anyway. So I'll have another crack at things this week.

rachelkitty

stubs_entry.S

// !!! THIS FILE IS GENERATED. DO NOT EDIT. !!!
#include "stubs_asm.h"

NSTUB(AllocateMemory, 0xffaa343😎
NSTUB(AllocateUncacheableMemory, 0xff8393ec)
NSTUB(Close, 0xff835980)
NSTUB(CreateTask, 0xff81e5b4)
NSTUB(DeleteFile_Fut, 0xff83530c)
// ERROR: EnterToCompensationEVF is not found!
NSTUB(ExecuteEventProcedure, 0xff8898ac)
// ERROR: ExitFromCompensationEVF is not found!
// Best match: 57%
NSTUB(ExitTask, 0xff81e844)
NSTUB(Fclose_Fut, 0xff83548😎
NSTUB(Feof_Fut, 0xff835674)
NSTUB(Fflush_Fut, 0xff8356b0)
NSTUB(Fgets_Fut, 0xff8355dc)
NSTUB(Fopen_Fut, 0xff83544😎
NSTUB(Fread_Fut, 0xff835534)
NSTUB(FreeMemory, 0xffaa3430)
// Best match: 91%
NSTUB(FreeUncacheableMemory, 0xff83942c)
NSTUB(Fseek_Fut, 0xff83562😎
NSTUB(Fwrite_Fut, 0xff83558😎
// Best match: 52%
NSTUB(GetBatteryTemperature, 0xff86358😎
// Best match: 52%
NSTUB(GetCCDTemperature, 0xff863514)
// Best match: 85%
NSTUB(GetCurrentAvValue, 0xff95c14c)
NSTUB(GetDrive_ClusterSize, 0xff86fc30)
NSTUB(GetDrive_FreeClusters, 0xff86fc90)
NSTUB(GetDrive_TotalClusters, 0xff86fc64)
// Best match: 64%
NSTUB(GetFocusLensSubjectDistance, 0xff95a720)
NSTUB(GetFocusLensSubjectDistanceFromLens, 0xff95ab6😎
// Best match: 96%
NSTUB(GetOpticalTemperature, 0xff8635fc)
// Best match: 66%
NSTUB(GetParameterData, 0xff99680😎
// Best match: 72%
NSTUB(GetPropertyCase, 0xff88d5e0)
// Best match: 96%
NSTUB(GetSystemTime, 0xffaa3490)
// Best match: 74%
NSTUB(GetZoomLensCurrentPoint, 0xff95ed2😎
NSTUB(GetZoomLensCurrentPosition, 0xffa9669c)
// Best match: 64%
NSTUB(IsStrobeChargeCompleted, 0xff8db30c)
NSTUB(LocalTime, 0xff8871a😎
// Best match: 93%
NSTUB(LockMainPower, 0xff895274)
// ERROR: Lseek is not found!
// Best match: 92%
NSTUB(MakeDirectory_Fut, 0xff835380)
// Best match: 57%
NSTUB(MoveFocusLensToDistance, 0xffb030c😎
// Best match: 58%
NSTUB(MoveZoomLensWithPoint, 0xffaa0a5c)
// Best match: 62%
NSTUB(NewTaskShell, 0xff88d08c)
NSTUB(Open, 0xff83592😎
// ERROR: PT_PlaySound is not found!
// Best match: 86%
NSTUB(PostLogicalEventForNotPowerType, 0xff8930a0)
// Best match: 92%
NSTUB(PostLogicalEventToUI, 0xff8930ec)
NSTUB(Read, 0xff81ab7😎
NSTUB(ReadFastDir, 0xffa8416c)
// ERROR: RefreshPhysicalScreen is not found!
// ERROR: Remove is not found!
// Best match: 53%
NSTUB(RenameFile_Fut, 0xff835444)
// ALT: NSTUB(RenameFile_Fut, 0xffa7047😎 // 8/7
// ALT: NSTUB(RenameFile_Fut, 0xffa704c😎 // 8/7
// Best match: 93%
NSTUB(SetAutoShutdownTime, 0xff8952e😎
// Best match: 81%
NSTUB(SetCurrentCaptureModeType, 0xff89ca3😎
// Best match: 55%
NSTUB(SetFileTimeStamp, 0xff94a7f😎
// Best match: 64%
NSTUB(SetLogicalEventActive, 0xff894fc4)
// Best match: 68%
NSTUB(SetParameterData, 0xff9966e4)
// Best match: 89%
NSTUB(SetPropertyCase, 0xff88d4dc)
// Best match: 92%
NSTUB(SleepTask, 0xff839070)
// Best match: 60%
NSTUB(TakeSemaphore, 0xff838d3😎
// ERROR: TurnOffBackLight is not found!
// ERROR: TurnOnBackLight is not found!
// ERROR: UIFS_WriteFirmInfoToFile is not found!
// Best match: 93%
NSTUB(UnlockMainPower, 0xff8951c😎
NSTUB(UpdateMBROnFlash, 0xff813f74)
NSTUB(VbattGet, 0xff831e0😎
NSTUB(Write, 0xff835a10)
NSTUB(_log, 0xffb3dd8😎
NSTUB(_log10, 0xffb3cccc)
NSTUB(_pow, 0xffb3ce3c)
NSTUB(_sqrt, 0xffb3f0f0)
NSTUB(close, 0xff81a990)
NSTUB(closedir, 0xffa83ff4)
// Best match: 71%
NSTUB(closefastdir, 0xffa8430😎
// Best match: 95%
NSTUB(free, 0xff81413😎
// Best match: 86%
NSTUB(kbd_p1_f, 0xff8335d0)
// Best match: 86%
NSTUB(kbd_p1_f_cont, 0xff8335dc)
// Best match: 86%
NSTUB(kbd_p2_f, 0xff832e90)
// Best match: 51%
NSTUB(kbd_pwr_off, 0xff8603ec)
// ERROR: kbd_pwr_on is not found!
// Best match: 84%
NSTUB(kbd_read_keys, 0xff833554)
// Best match: 78%
NSTUB(kbd_read_keys_r2, 0xff85fb6😎
// ALT: NSTUB(kbd_read_keys_r2, 0xff85fb4c) // 17/5
NSTUB(lseek, 0xff835a9c)
NSTUB(malloc, 0xff8140dc)
NSTUB(memcmp, 0xff8203ec)
NSTUB(memcpy, 0xff83e9ec)
NSTUB(memset, 0xffa1389c)
NSTUB(mkdir, 0xff835df4)
NSTUB(mktime_ext, 0xff8aaf6c)
NSTUB(open, 0xff81a8e0)
NSTUB(opendir, 0xffa8403😎
// ERROR: openfastdir is not found!
NSTUB(qsort, 0xffaf37d😎
// Best match: 95%
NSTUB(rand, 0xff8204f4)
NSTUB(read, 0xff81ab7😎
// ERROR: readfastdir is not found!
// ERROR: rename is not found!
// Best match: 95%
NSTUB(srand, 0xff8204e😎
NSTUB(stat, 0xff835ad😎
// ALT: NSTUB(stat, 0xff86d074) // 30/0
// Best match: 61%
NSTUB(strcat, 0xff813f3😎
// Best match: 56%
NSTUB(strchr, 0xff813fc0)
NSTUB(strcmp, 0xff8203a😎
NSTUB(strcpy, 0xff820390)
NSTUB(strftime, 0xff8aa974)
NSTUB(strlen, 0xff81400c)
NSTUB(strncmp, 0xff813f74)
// Best match: 73%
NSTUB(strncpy, 0xff813f3😎
// Best match: 71%
NSTUB(strrchr, 0xff83e9c4)
// ALT: NSTUB(strrchr, 0xff8aa73c) // 18/8
// Best match: 96%
NSTUB(strtol, 0xff83eccc)
NSTUB(strtolx, 0xff83ead0)
// Best match: 86%
NSTUB(time, 0xff887720)
NSTUB(vsprintf, 0xff820354)
NSTUB(write, 0xff81abd😎

stubs_entry_2.S

#include "stubs_asm.h"
//FOUND
NHSTUB(TurnOffBackLight, 0xFF8A3FD0)
NHSTUB(TurnOnBackLight,  0xFF8A3FE😎
NHSTUB(EnterToCompensationEVF, 0xFF836D0C)
NHSTUB(ExitFromCompensationEVF, 0xFF836D50)
NHSTUB(Lseek, 0xFF835530)
NHSTUB(PT_PlaySound, 0xFF88173C)
NHSTUB(RefreshPhysicalScreen, 0xFFA08E40)
NHSTUB(Remove, 0xFF83541😎
NHSTUB(UIFS_WriteFirmInfoToFile, 0xFF97E91C)
NHSTUB(kbd_pwr_off, 0xFF86089C)
NHSTUB(openfastdir, 0xFFA7D510)
NHSTUB(readfastdir, 0xFFA7D644)
NHSTUB(rename, 0xFF8354C0)
NHSTUB(LEDDrive, 0xFF85D5F😎
NHSTUB(SetScriptMode, 0xFF810EE4) //not definite, recheck later
NHSTUB(apex2us, 0xFFA0D734)
NHSTUB(MakeAFScan, 0xFF9645F0)
NHSTUB(ExpCtrlTool_StartContiAE, 0xFF8446CB)
NHSTUB(WriteSDCard, 0xFF94A47😎
NHSTUB(UnlockAF, 0xFF836BA0)
NHSTUB(DoAFLock, 0xFF836B6😎
NHSTUB(UnsetZoomForMovie, FF8A0DC0)

//NOTFOUND - nullsub

NHSTUB(kbd_pwr_on, 0xFF810B04)//cannot locate
NHSTUB(rewinddir, 0xFF810B04)//cannot locate
NHSTUB(SetZoomActuatorSpeedPercent, 0xFF810B04)//cannot locate
NHSTUB(Unmount_FileSystem, 0xFF810B04)//cannot locate
NHSTUB(Mount_FileSystem, 0xFF810B04)//cannot locate
//NHSTUB(platformsub_kbd_fetch_data, 0xFF833350)

stubs_min.S

#include "stubs_asm.h"

DEF(physw_status, 0x330d😎                 
DEF(physw_run, 0x1C38 + 0x0C)            
DEF(FlashParamsTable,0xFFBEFB70)      
DEF(zoom_busy, 0x7a00)          
DEF(focus_busy, 0x78d4 + 😎              
DEF(canon_menu_active, 0x3034 + 4)        
DEF(canon_shoot_menu_active, 0x8944 + 1)  
DEF(recreview_hold, 0x8944)    
DEF(zoom_status, 0x8A84)                  
DEF(movie_status, 0x7ab0 + 0x3😎         
DEF(enabled_refresh_physical_screen, 0xa36c) 
DEF(playrec_mode, 0x2d60+0x4)         
DEF(some_flag_for_af_scan, 0x7FF4)	     
DEF(led_table, 0x24AC + 0x04)             
DEF(levent_table,0xFFB95D20) //uncertain

lib.c and boot.c is pretty much done. need to look at movie_rec and capt_seq still then move on to other stuff.

Microfunguy

It is a lot of work and we are all so busy with our brief lives.
Good to see you getting back to this 😀

Remember, ERR99 now has all the time in the World and I am sure would be only too happy to advise !

David

MauricioRPP

can I help in some way?? I know I can't code in ASM, but I could test your code Rachelkitty when it becomes a file that I can load in the camera. thanks for your efforts!

rachelkitty

So, bootup is runnign with a fallover late on, seems to be when screen would normally be initialising, need to take a look at that.

Microfunguy

Are any folders created ?

Try commenting-out most of the spytask functions and then enable them one-by-one.

David

ERR99

If commenting out the spytask does not help, comment out the kbd task also and start the original kbd-task instead.
I dont know how the S90 works, but on the G11 i had to change the "usual" code in kbd.c,
because with the standard implementation, display&key lightning are switched off and the camera "looks" dead/off, but it wasnt.

Also disable all chdk hook tasks (capture, movie, etc.). There are not so important now, chdk will run also without them.
You can activate them later, after you are sure that spytask and kbd task are running stable.

Another pitfall, which often crashes the g11 during startup, was the spytask config loading. If fixed that in the G11 port. I expect that you also need the other chdk core changes for the new dryos, so maybe you also have to set the CAM_DRYOS_2_3_R39 define in camera.h. For that, you need the actual chdk code (with g11 port included).

rachelkitty

Run into a bit of an issue, can't locate ScreenLock and ScreenUnlock. Anyone else that could have a look through the dump and see if they can find?

Microfunguy

Are the G11 and SX200IS the best firmwares to compare the S90 with ?

rachelkitty

The G11 hardware is almost identical to the S90, except for the bigger body, so it's a pretty good choice for comparisons. I've run through a whole bunch of firmwares so far, but those 2 functions are the ones that are eluding me.

Microfunguy

OK, I will try to find them after my tea.

rachelkitty

Thanks very much, I appreciate any help 😀

Microfunguy

Assuming that the first firmware dump you made available is OK, the addresses are :-

NHSTUB(ScreenLock, 0xFFA0A10C)
NHSTUB(ScreenUnlock,0xFFA0A134)

Just to confirm, I have :-

ROM:FFA0A10C STMFD SP!, {R4,LR}
ROM:FFA0A110 BL sub_FFA0A2EC

David

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