Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery

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#1 | Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Thu Oct 01, 2015 9:56 pm (Last edited: Thu Oct 01, 2015 10:15 pm)

incud2

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Posts:	18
Registered since:	10.01.2015

Hi everyone :) That's the first time I write on this forum. I'm a beginner in BIOS modding, and I'm stuck in trying to resolve a quite simple problem. Maybe you can help me

I've got a motherboard Gigabyte GA-C1037UN (that's the product page and here the BIOS download link) with an UEFI/BIOS (derived from AMI Aptio one).

Basically, I want to modify two things:
- First (and most important one) after instering or removing battery, I turn on the computer and the UEFI immediatly asks me to choose between: "load optimezed settings and boot" (or something similar), "load optimezed settings and REboot", "enter BIOS". I want it to load the default/optimized settings without asking anything
- Second, I want to change the CMOS default/optimized settings with the one I want. This thing seems to be easy to do. I found AMIBCP v4.55.0070 (version 4.53 does not work) and it lets me change the settings I want. So I think that this second point is almost done.

The problem is going on with the first point. First I tried to change the settings in AMIBCP > "Setup Configuration" tab > Recovery. I found the option "Reset NVRAM" (disabled for failsafe settings, enable for optimized settings) and "Main block update" (disabled for failsafe settings, enable for optimized settings too). I really don't know what are these options. Here's a screenshot:

Link in case the image does not load: http://imgur.com/Dh9O9D9

I tried to brute-force some of the possible combination (all 4 disabled, all four enable, ...) but it always display the message (after insering or removing the battery, I mean).

Then I tried to analyze the firmware with AMI Aptio UEFI MMTool v5.0.0.7 (I found the guide on this forum - I mean this). If I undestood how it works, this tool should let you extract the single modules of the BIOS (already decompressed),you modify the modules you want and then it lets you substitute the default module with the "custom" one. Am I right?
After running the tool, I saved the "report". It's this:

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+------------------------------------------------------------------------+
| MMTOOL  5.00.0007						         |
| Copyright (c)2014 American Megatrends, Inc.                                 |
+------------------------------------------------------------------------+
| Firmware Image Information                                                  |
+-----------------------------------------------------------------------------+
| Image Size : 400000   PI Specification Level: 1.0                           |
+------+-------------------------------+--------------+-----------+-----------+
|  FV  |            FV TYPE            |   Location   |   Length  |    FFSs   |
+------+-------------------------------+--------------+-----------+-----------+
|  00  |          FFS FV               |   00180000   |  020000   |    001    |
|  01  |          FFS FV               |   001C0000   |  1A0000   |    003    |
|  02  |          Nested FV            |   00000000   |  5CC000   |    171    |
|  03  |          Boot Block FV        |   00360000   |  0A0000   |    041    |
+------+-------------------------------+--------------+-----------+-----------+
| Nested Firmware Volume Information                                          |
+-----------------------------------------------------------------------------+
|  FV  |            Nesting Information       	      |   Length  |    FFSs   |
+-----------------------------------------------------------------------------+
|  02  |  Parent Fv : 01        Parent FFS : 00       |   5CC000  |    171    |
+------+-------------------------------+--------------+-----------+-----------+
| NCB Information                                                             |
+-----------------------------------------------------------------------------+
| NCB No : 0                         Location :  00000000   Length :  180000  |
| NCB No : 1                         Location :  001A0000   Length :  020000  |
+-----------------------------------------------------------------------------+
| Driver Information                                                          |
+-----------------------------------------------------------------------------+
| Firmware Volume : 00               Location :  00180000   Length :  020000  |
+---+---------------+------------------------------------+--------+------+----+
|NO |    FileName   |               GUID                 |Location| Size |Type|
+---+---------------+------------------------------------+--------+------+----+
|000|               |CEF5B9A3-476D-497F-9FDC-E98143E0422C|00180048|01FFB8|RAW |
+---+---------------+------------------------------------+--------+------+----+
| Bytes Free       : 000000 (  0 KB)    Bytes Used       : 020000 (128 KB)    |
+-----------------------------------------------------------------------------+
| Firmware Volume : 01               Location :  001C0000   Length :  1A0000  |
+---+---------------+------------------------------------+--------+------+----+
|NO |    FileName   |               GUID                 |Location| Size |Type|
+---+---------------+------------------------------------+--------+------+----+
|000|               |AE717C2F-1A42-4F2B-8861-78B79CA07E07|001C0048|16AA15|FV  |
|001|               |17088572-377F-44EF-8F4E-B09FFF46A070|0032AA78|020818|RAW |
|002|S3Restore      |EFD652CC-0E99-40F0-96C0-E08C089070FC|0034B290|0025BC|PEIM|
+---+---------------+------------------------------------+--------+------+----+
| Bytes Free       : 0127C8 ( 73 KB)    Bytes Used       : 18D838 (1590 KB)    |
+-----------------------------------------------------------------------------+
| Firmware Volume : 02               Location :  00000000   Length :  5CC000  |
+---+---------------+------------------------------------+--------+------+----+
|NO |    FileName   |               GUID                 |Location| Size |Type|
+---+---------------+------------------------------------+--------+------+----+
|000|IntelSaGopDriver|5C266089-E103-4D43-9AB5-12D7095BE2AF|00000048|001335|DRVR|
|001|IntelIvbGopDriv|5BBA83E6-F027-4CA7-BFD0-16358CC9E123|0000137D|00B104|DRVR|
|002|IntelSnbGopDriv|8D59EBC8-B85E-400E-970A-1F995D1DB91E|0000C481|00AE64|DRVR|
|003|               |17088572-377F-44EF-8F4E-B09FFF46A070|000172E5|020818|RAW |
|004|CpuDxe         |E03ABADF-E536-4E88-B3A0-B77F78EB34FE|00037AFD|0034A1|DRVR|
|005|FileSystem     |93022F8C-1F09-47EF-BBB2-5814FF609DF5|0003AF9E|007EC1|DRVR|
|006|               |DAC2B117-B5FB-4964-A312-0DCC77061B9B|00042E5F|00955D|FRFM|
|007|               |9221315B-30BB-46B5-813E-1B1BF4712BD3|0004C3BC|0006F1|FRFM|
|008|CORE_DXE       |5AE3F37E-4EAE-41AE-8240-35465B5E81EB|0004CAAD|16EB41|DXEC|
|009|Runtime        |CBC59C4A-383A-41EB-A8EE-4498AEA567E4|001BB5EE|0125E1|DRVR|
|010|ReFlash        |70E1A818-0BE1-4449-BFD4-9EF68C7F02A8|001CDBCF|00332D|DRVR|
|011|PciBus         |3C1DE39F-D207-408A-AACC-731CFB7F1DD7|001D0EFC|00DDD9|DRVR|
|012|AmiBoardInfo   |9F3A0016-AE55-4288-829D-D22FD344C347|001DECD5|00B9C9|DRVR|
|013|EBC            |13AC6DD0-73D0-11D4-B06B-00AA00BD6DE7|001EA69E|0037D9|DRVR|
|014|It8728SmmFeatur|078485F1-0C1F-4B1B-AFB3-4A09C0EF87A1|001EDE77|0020C9|DRVR|
|015|IT8728SioAcBack|AA893E19-A641-4819-AD23-011B7C24250D|001EFF40|0013AD|DRVR|
|016|CpuInitDxe     |62D171CB-78CD-4480-8678-C6A2A797A8DE|001F12ED|00E4A1|DRVR|
|017|SmmRelocDxe    |7FED72EE-0170-4814-9878-A8FB1864DFAF|001FF78E|000F69|DRVR|
|018|SmmRelocPeim   |ABB74F50-FD2D-4072-A321-CAFC72977EFA|002006F7|000BAD|PEIM|
|019|SmmBaseRuntime |5552575A-7E00-4D61-A3A4-F7547351B49E|002012A4|004F6D|DRVR|
|020|SmmDisp        |9CC55D7D-FBFF-431C-BC14-334EAEA6052B|00206211|0056C1|DRVR|
|021|SmmThunk       |8D3BE215-D6F6-4264-BEA6-28073FB13AEA|0020B8D2|000CD5|DRVR|
|022|CpuPolicyDxe   |15B9B6DA-00A9-4DE7-B8E8-ED7AFB88F16E|0020C5A7|00158D|DRVR|
|023|MicrocodeUpdate|F3331DE6-4A55-44E4-B767-7453F7A1A021|0020DB34|0058A1|DRVR|
|024|CpuSmmSaveRes  |326E7ACE-2133-1BA2-800A-B9C00ACCB17D|002133D5|001ACD|DRVR|
|025|CpuSpSMI       |116E1ACF-2533-4CC2-820A-BBC10A2AB07C|00214EA2|001595|DRVR|
|026|SBDXE          |B7D19491-E55A-470D-8508-85A5DFA41974|00216437|007E35|DRVR|
|027|SBRun          |E23F86E1-056E-4888-B685-CFCD67C179D4|0021E26C|0025BD|DRVR|
|028|               |22046D50-F390-498C-92E5-5BA4F8E7F8B6|00220829|00020E|FRFM|
|029|SmmChildDispatc|753630C9-FAE5-47A9-BBBF-88D621CD7282|00220A37|0032C9|DRVR|
|030|SmmChildDispatc|E53734A3-E594-4C25-B1A2-081445650F7F|00223D00|0047E9|DRVR|
|031|AcpiModeEnable |750890A6-7ACF-4F4F-81BD-B400C2BEA95A|002284E9|002411|SMM |
|032|SleepSmi       |6298FE18-D5EF-42B7-BB0C-2953283F5704|0022A8FA|002715|DRVR|
|033|SBSMI          |7B8DB049-C7C7-4D3B-809F-926DEE47CCA2|0022D00F|0032F1|DRVR|
|034|PchSpiWrap     |B716A6F8-F3A1-4B8E-8582-5A303F1CDD64|00230300|000E29|DRVR|
|035|WdtAppDxe      |CE366D33-B057-4C03-8561-CAF17738B66F|00231129|0012F5|DRVR|
|036|SataDriver     |91B4D9C1-141C-4824-8D02-3C298E36EB3F|0023241E|02DDF9|DRVR|
|037|ActiveBios     |BFD59D42-FE0F-4251-B772-4B098A1AEC85|00260217|000909|DRVR|
|038|IoTrap         |2374EDDF-F203-4FC0-A20E-61BAD73089D6|00260B20|0017E1|DRVR|
|039|IntelLegacyInte|C1C418F9-591D-461C-82A2-B9CD96DFEA86|00262301|000515|DRVR|
|040|PchInitDxe     |DE23ACEE-CF55-4FB6-AA77-984AB53DE823|00262816|00BA2D|DRVR|
|041|PchSmiDispatcher|B0D6ED53-B844-43F5-BD2F-61095264E77E|0026E243|005E55|DRVR|
|042|PchPcieSmm     |ACAEAA7A-C039-4424-88DA-F42212EA0E55|00274098|002681|DRVR|
|043|PchReset       |BB1FBD4F-2E30-4793-9BED-74F672BC8FFE|00276719|001785|DRVR|
|044|PchS3Peim      |271DD6F2-54CB-45E6-8585-8C923C1AC706|00277E9E|0016DC|PEIM|
|045|PchS3Support   |08F2C63B-08DE-4CCD-8670-ACFE644A1C48|0027957A|000D45|DRVR|
|046|SataController |BB65942B-521F-4EC3-BAF9-A92540CF60D2|0027A2BF|001A29|DRVR|
|047|PchSerialGpio  |FC1B7640-3466-4C06-B1CC-1C935394B5C2|0027BCE8|000DED|DRVR|
|048|SmartTimer     |90CB75DB-71FC-489D-AACF-943477EC7212|0027CAD5|000909|DRVR|
|049|PchSmbusDxe    |E052D8A6-224A-4C32-8D37-2E0AE162364D|0027D3DE|001A19|DRVR|
|050|SmmControl     |A0BAD9F7-AB78-491B-B583-C52B7F84B9E0|0027EDF7|000C29|DRVR|
|051|PchSpiSmm      |27F4917B-A707-4AAD-9676-26DF168CBF0D|0027FA20|0025E5|DRVR|
|052|PchSpiRuntime  |C194C6EA-B68C-4981-B64B-9BD271474B20|00282005|002E8D|DRVR|
|053|PchSmbusSmm    |59287178-59B2-49CA-BC63-532B12EA2C53|00284E92|001459|DRVR|
|054|WdtDxe         |5AAB83E5-F027-4CA7-BFD0-16358CC9E453|002862EB|000BE1|DRVR|
|055|NBDXE          |E4ECD0B2-E277-4F2B-BECB-E4D75C9A812E|00286ECC|0054A1|DRVR|
|056|NBSMI          |D933DEDE-0260-4E76-A7D9-2F9F2440E5A5|0028C36D|001E3D|DRVR|
|057|MiscSubclassDxe|16271FCA-55D9-4A33-93FC-5A3EB128DE21|0028E1AA|001125|DRVR|
|058|UpdateMemoryRec|24CCD374-3DF6-4181-86F6-E3C66920A145|0028F2CF|001BF5|DRVR|
|059|LegacyRegion2  |FE6F8ACD-55A6-4C6B-B448-64E659DE94B3|00290EC4|000D9D|DRVR|
|060|AtaCtlrDriver  |262A5367-7775-4518-A3EC-84981AD4A1C0|00291C61|001B45|DRVR|
|061|AtaCtlrDxe     |004E431F-3E44-43AC-89B9-F79708BD3C09|002937A6|001E89|DRVR|
|062|AtaCtlrSmm     |53888A04-B140-4B2C-AA9C-C89E1F90CCD0|0029562F|001499|DRVR|
|063|OnboardControll|1601E050-BE0C-41B7-8F96-9F48F72B7E26|00296AC8|001ABD|DRVR|
|064|AsUndiDxe      |603DC12F-BF47-4683-9D56-C8893C638A88|00298585|009A85|DRVR|
|065|RtkUndiDxe     |2851E234-20FD-4D1E-9041-DCB8F3025CAE|002A200A|0161D1|DRVR|
|066|PciExpressDxe  |A89EC8E0-0BA1-40AA-A03E-ABDDA5295CDE|002B81DB|002BA1|DRVR|
|067|PciHostBridge  |8D6756B9-E55E-4D6A-A3A5-5E4D72DDF772|002BAD7C|002AED|DRVR|
|068|SmBiosMemory   |EDA39402-F375-4496-92D3-83B43CB8A76A|002BD869|002A75|DRVR|
|069|SmmAccess      |1323C7F8-DAD5-4126-A54B-7A05FBF41515|002C02DE|000D55|DRVR|
|070|               |27E569D5-0AFC-4D8F-8C90-783AC4A318AB|002C1033|00009F|FRFM|
|071|SaInitDxe      |DE23ACEE-CF55-4FB6-AA77-984AB53DE811|002C10D2|0060F5|DRVR|
|072|BdatAccessHandl|6DB9486F-6AF6-4090-984D-238482CE3EA4|002C71C7|0008E9|DRVR|
|073|SaLateInitSmm  |2D1E361C-7B3F-4D15-8B1F-66E551FABDC7|002C7AB0|003C01|DRVR|
|074|               |878AC2CC-5343-46F2-B563-51F89DAF56BA|002CB6B1|0010D1|RAW |
|075|               |0F729F33-25C1-41A7-86B2-23A737A91823|002CC782|0010D1|RAW |
|076|PciTestAdapter |3F79BEE2-6B14-4B5E-916B-101D8F7E15BE|002CD853|0012F1|DRVR|
|077|ACPI           |16D0A23E-C09C-407D-A14A-AD058FDD0CA1|002CEB44|00984D|DRVR|
|078|S3Save         |26A2481E-4424-46A2-9943-CC4039EAD8F8|002D8391|003249|SMMD|
|079|S3Restore      |EFD652CC-0E99-40F0-96C0-E08C089070FC|002DB5DA|0025BC|PEIM|
|080|CryptoDxe      |20D8FFFE-15C3-4EA9-9D28-CFE2745D78F3|002DDB96|0111D5|DRVR|
|081|AHCI           |8F5A2E02-538C-4D59-B920-C4786ACBC552|002EED6B|006915|DRVR|
|082|AINT13         |67820532-7613-4DD3-9ED7-3D9BE3A7DA63|002F5680|001C31|DRVR|
|083|AhciSmm        |BC3245BD-B982-4F55-9F79-056AD7E987C5|002F72B1|002951|DRVR|
|084|BDRDXE         |5E06E249-3A4C-49B5-8A37-02058CC12691|002F9C02|004151|DRVR|
|085|BDRSMM         |ACA87EA5-D839-4F41-BCCE-9E19E9F2C2AD|002FDD53|004235|DRVR|
|086|DualBiosDxe    |C74D1B0B-91B1-484A-A038-FE7A0847AA07|00301F88|005889|DRVR|
|087|DualBiosSMM    |88B468B3-A48B-4B87-ABE2-8E56DFFDAF8D|00307811|0002DD|DRVR|
|088|Slp10          |8E477676-55FD-48CF-9210-15A99B27D740|00307AEE|000EA9|DRVR|
|089|SlpSupport     |4C494E55-5849-5342-4554-544552212121|00308997|000FB9|DRVR|
|090|KbcEmul        |3B24F79D-91A0-46FF-BE29-458AE211FAC5|00309950|004115|DRVR|
|091|CSMCORE        |A062CF1F-8473-4AA3-8793-600BC4FFE9A8|0030DA65|040B85|DRVR|
|092|               |A08276EC-A0FE-4E06-8670-385336C7D093|0034E5EA|000435|FRFM|
|093|BIOSBLKIO      |25ACF158-DD61-4E64-9A49-55851E9A26C7|0034EA1F|0033F5|DRVR|
|094|CsmVideo       |29CF55F8-B675-4F5D-8F2F-B87A3ECFD063|00351E14|004735|DRVR|
|095|               |60AC3A8F-4D66-4CD4-895A-C3F06E6665EE|00356549|0000D6|FRFM|
|096|iFfsDxe        |B6B9295F-CABF-4CEC-BB14-FE4246F2173A|0035661F|001C89|DRVR|
|097|iFfsSmm        |43172851-CF7E-4345-9FE0-D7012BB17B88|003582A8|001A05|DRVR|
|098|iFfsDxePolicyIn|DDB412A6-E3F3-4E9E-90A3-2A991270219C|00359CAD|001035|DRVR|
|099|HeciDxe        |55E76644-78A5-4A82-A900-7126A5798892|0035ACE2|002FC1|DRVR|
|100|HeciSmm        |921CD783-3E22-4579-A71F-00D74197FCC8|0035DCA3|001AD5|DRVR|
|101|PlatformReset  |9A9A912B-5F53-4586-8820-704485A29D21|0035F778|000DFD|DRVR|
|102|MdesStatusCodeD|DF5CD25A-8E55-46BA-8CDA-BC7DB7BF9C64|00360575|000C85|DRVR|
|103|MePlatformPolicy|BA67550C-3628-4137-A53E-42660E081604|003611FA|00148D|DRVR|
|104|MePciPlatform  |459C70C3-9344-4484-9F93-7822530D0D11|00362687|0007CD|DRVR|
|105|IccPlatform    |14257B56-BDA2-4FAF-8E4F-C885DF75583C|00362E54|00174D|DRVR|
|106|IccOverClocking|5BBA83E5-F027-4CA7-BFD0-16358CC9E123|003645A1|0049D1|DRVR|
|107|Smbios131      |2B341C7B-0B32-4A65-9D46-E1B3ABD4C25C|00368F72|000EE5|DRVR|
|108|MERecoveryDxe  |F1FCD66F-8966-441E-909C-77F211AB9C3E|00369E57|00442D|DRVR|
|109|               |821D110C-D0A3-4CF7-AEF3-E28088491704|0036E284|040025|FRFM|
|110|MouseDriver    |C7A7030C-C3D8-45EE-BED9-5D9E76762953|003AE2A9|004009|DRVR|
|111|OemActivation  |76D5CF91-0C55-434E-97C2-D2825C82E610|003B22B2|001D85|SMMD|
|112|AcpiPlatform   |8B5FBABD-F51F-4942-BF16-16AAA38AE52B|003B4037|003161|DRVR|
|113|AcpiPlatformSmi|DFD8D5CC-5AED-4820-A2B6-5C55E4E640EF|003B7198|001A91|DRVR|
|114|PlatformInfo   |1314216C-CB8D-421C-B854-06231386E642|003B8C29|00100D|DRVR|
|115|SMBIOSUpdateData|B98999A4-E96F-475A-99FC-762126F50F5A|003B9C36|000AA5|DRVR|
|116|               |FB045DB2-598E-485A-BA30-5D7B1B1BD54D|003BA6DB|0001A7|FRFM|
|117|FastBootOption |A58C5D1D-C22B-4845-90BC-8C94FCE96457|003BA882|001BE1|DRVR|
|118|PowerManagement|8C783970-F02A-4A4D-AF09-8797A51EEC8D|003BC463|004D1D|DRVR|
|119|               |299141BB-211A-48A5-92C0-6F9A0A3A006E|003C1180|000937|FRFM|
|120|AmiPpmPolicy   |1CE12314-AFBC-11F0-8A3E-AB44B8EE3120|003C1AB7|00197D|DRVR|
|121|QFlash         |132EC73B-3025-4FBF-B193-8ACB50EFBD89|003C3434|007B99|DRVR|
|122|EzFileBrowser  |56B70419-7103-4D0E-83F4-F3546BD21E40|003CAFCD|00400D|DRVR|
|123|SecureBootMod  |A95C1D60-CB9F-4BD8-A030-3F1C4A185156|003CEFDA|00179D|DRVR|
|124|               |FBF95065-427F-47B3-8077-D13C60710998|003D0777|001159|FRFM|
|125|               |9D7A05E9-F740-44C3-858B-75586A8F9C8E|003D18D0|00064D|FRFM|
|126|CmosManagerSmm |6869C5B3-AC8D-4973-8B37-E354DBF34ADD|003D1F1D|0037C1|DRVR|
|127|GenericComponen|199FD111-0785-4132-A9B3-1F66573F0060|003D56DE|01CB5D|DRVR|
|128|SMBiosBoard    |CEF68C66-06AB-4FB3-A3ED-5FFA885B5725|003F223B|001A89|DRVR|
|129|SMBios64       |B13EDD38-684C-41ED-A305-D7B7E32497DF|003F3CC4|006349|DRVR|
|130|SmbiosGetFlashD|DED7956D-7E20-4F20-91A1-190439B04D5B|003FA00D|000F2D|DRVR|
|131|               |DAF4BF89-CE71-4917-B522-C89D32FBC59F|003FAF3A|0019F1|FRFM|
|132|SmbiosDMIEdit  |E2A74738-8934-48F5-8412-99E948C8DC1B|003FC92B|003805|DRVR|
|133|SMIFlash       |BC327DBD-B982-4F55-9F79-056AD7E987C5|00400130|005A19|DRVR|
|134|SmiVariable    |BE216BA8-38C4-4535-A6CA-5DCA5B43ADDF|00405B49|001D49|DRVR|
|135|AMITSE         |B1DA0ADF-4F77-4070-A88E-BFFE1C60529A|00407892|08535D|DRVR|
|136|               |A59A0056-3341-44B5-9C9C-6D76F7673817|0048CBEF|0000A7|FRFM|
|137|               |63819805-67BB-46EF-AA8D-1524A19A01E4|0048CC96|004EBD|FRFM|
|138|               |EFCB2FDB-0662-4A59-A5D7-03033EA97CAE|00491B53|0104C9|FRFM|
|139|SmmRuntime     |A56897A1-A77F-4600-84DB-22B0A801FA9A|004A201C|001479|DRVR|
|140|DpcDxe         |399CF3A7-82C7-4D9B-9123-DB11842986D3|004A3495|0008B9|DRVR|
|141|ArpDxe         |8DD91798-EE87-4F0E-8A84-3F998311F930|004A3D4E|002F59|DRVR|
|142|SnpDxe         |3DD7A87B-D5BD-44AF-986F-2E13DB5D274C|004A6CA7|0037F9|DRVR|
|143|MnpDxe         |C30B94E3-C8F2-4AB0-91AB-FA8DF621B1C9|004AA4A0|004B59|DRVR|
|144|UefiPxeBcDxe   |0EF8A3B1-388A-4B62-8BE6-C7877D50AEDF|004AEFF9|00D025|DRVR|
|145|NetworkStackSet|0029DE6A-E024-4EB8-A91D-9F23AA1F4E92|004BC01E|000C19|DRVR|
|146|TcpDxe         |B1625D3C-9D2D-4E0D-B864-8A763EE4EC50|004BCC37|00BB59|DRVR|
|147|Dhcp4Dxe       |8DD9176E-EE87-4F0E-8A84-3F998311F930|004C8790|006F1D|DRVR|
|148|Ip4ConfigDxe   |8F9296EF-2880-4659-B857-915A8901BDC8|004CF6AD|0047C5|DRVR|
|149|Ip4Dxe         |8F92960F-2880-4659-B857-915A8901BDC8|004D3E72|008BD9|DRVR|
|150|Mtftp4Dxe      |61AFA223-8AC8-4440-9AB5-762B1BF05156|004DCA4B|0056BD|DRVR|
|151|Udp4Dxe        |10EE5462-B207-4A4F-ABD8-CB522ECAA3A4|004E2108|005719|DRVR|
|152|Dhcp6Dxe       |8DD9176D-EE87-4F0E-8A84-3F998311F930|004E7821|00689D|DRVR|
|153|Ip6Dxe         |8F92960E-2880-4659-B857-915A8901BDC8|004EE0BE|010459|DRVR|
|154|Mtftp6Dxe      |61AFA251-8AC8-4440-9AB5-762B1BF05156|004FE517|00565D|DRVR|
|155|Udp6Dxe        |10EE54AE-B207-4A4F-ABD8-CB522ECAA3A4|00503B74|0053D9|DRVR|
|156|GbtCustomizeBut|4DCBF9BA-DEC1-42B0-8A09-01555694F6CF|00508F4D|0013AD|DRVR|
|157|RTCWakeup      |534A6A34-CF78-4A56-BEDB-CB49A8D8060C|0050A2FA|001739|DRVR|
|158|UHCD           |580DD900-385D-11D7-883A-00500473D4EB|0050BA33|00BF71|DRVR|
|159|USBRT          |04EAAAA1-29A1-11D7-8838-00500473D4EB|005179A4|011B61|SMM |
|160|USBINT13       |4C006CD9-19BA-4617-8483-609194A1ACFC|00529505|001A45|DRVR|
|161|SmartFanCtrlDXE|D8AAB432-93CC-48D2-9F34-3496CAF92185|0052AF4A|0015E1|DRVR|
|162|OemLOGO        |7D1686A9-1EE3-446C-825C-5A26F449CE52|0052C52B|001061|DRVR|
|163|MyOemLogo1     |86EE84E1-3375-41A1-AFBA-847BD29663AA|0052D58C|000A98|FRFM|
|164|MyOemLogo2     |86EE84E2-3375-41A1-AFBA-847BD29663AA|0052E024|00011B|FRFM|
|165|OEMDXE         |BFE205C9-5B17-4F8F-9375-89614AF8E199|0052E13F|000E55|DRVR|
|166|Setup          |899407D7-99FE-43D8-9A21-79EC328CAC21|0052EF94|054465|DRVR|
|167|               |7BB28B99-61BB-11D5-9A5D-0090273FC14D|005833F9|044C8D|FRFM|
|168|CRBDXE         |16271FCA-55D9-4A33-93FC-5A3EB128DEB6|005C8086|000C91|DRVR|
|169|CRBSMI         |221F1D4F-034C-4BEA-B2BB-B7A9672B06D7|005C8D17|0013A1|DRVR|
|170|CspLibDxe      |CD84562C-6864-40A3-A081-C8D35E82B920|005CA0B8|000275|DRVR|
+---+---------------+------------------------------------+--------+------+----+
| Bytes Free       : 001CD3 (  7 KB)    Bytes Used       : 5CA32D (5928 KB)    |
+-----------------------------------------------------------------------------+
| Firmware Volume : 03               Location :  00360000   Length :  0A0000  |
+---+---------------+------------------------------------+--------+------+----+
|NO |    FileName   |               GUID                 |Location| Size |Type|
+---+---------------+------------------------------------+--------+------+----+
|000|MemoryInit     |3B42EF57-16D3-44CB-8632-9FDB06B41451|00360048|02C8D2|PEIM|
|001|UsbBotPeim     |8401A046-6F70-4505-8471-7015B40355E3|0038C920|00196A|PEIM|
|002|Recovery       |E008B434-0E73-440C-8612-A143F6A07BCB|0038E290|003969|PEIM|
|003|CRBPEI         |0D1ED2F7-E92B-4562-92DD-5C82EC917EAE|00391C00|00097A|PEIM|
|004|WdtPei         |1D88C542-9DF7-424A-AA90-02B61F286938|00392580|000796|PEIM|
|005|CORE_PEI       |92685943-D810-47FF-A112-CC8490776A1F|00392D18|01E2B2|PEIC|
|006|IT8728SioAcBack|F5042177-1D29-45C5-BA4D-4D0EB2E88575|003B0FD0|0002A0|PEIM|
|007|CpuInitPei     |01359D99-9446-456D-ADA4-50A711C03ADA|003B1270|001C4E|PEIM|
|008|CpuS3Peim      |C866BD71-7C79-4BF1-A93B-066B830D8F9A|003B2EC0|001590|PEIM|
|009|SmmBasePeim    |8B8214F9-4ADB-47DD-AC62-8313C537E9FA|003B4450|000560|PEIM|
|010|CpuPolicyPei   |0AC2D35D-1C77-1033-A6F8-7CA55DF7D0AA|003B49B0|000762|PEIM|
|011|CpuPeiBeforeMem|1555ACF3-BD07-4685-B668-A86945A4124D|003B5118|0006E0|PEIM|
|012|CpuPei         |2BB5AFA9-FF33-417B-8497-CB773C2B93BF|003B57F8|00160E|PEIM|
|013|SBPEI          |C1FBD624-27EA-40D1-AA48-94C3DC5C7E0D|003B6E08|003938|PEIM|
|014|AcpiPlatformPei|333BB2A3-4F20-4C8B-AC38-0672D74315F8|003BA740|00087C|PEIM|
|015|SmBusPei       |9EA28D33-0175-4788-BEA8-6950516030A5|003BAFC0|0013CA|PEIM|
|016|WdtAppPei      |0F69F6D7-0E4B-43A6-BFC2-6871694369B0|003BC390|00052C|PEIM|
|017|PchInitPeim    |FD236AE7-0791-48C4-B29E-29BDEEE1A838|003BC8C0|003960|PEIM|
|018|PchResetPeim   |FF259F16-18D1-4298-8DD2-BD87FF2894A9|003C0220|000962|PEIM|
|019|PchSmbusArpDisa|643DF777-F312-42ED-81CC-1B1F57E18AD6|003C0B88|000BA0|PEIM|
|020|PchSpiPeim     |AA652CB9-2D52-4624-9FAE-D4E58B67CA46|003C1728|0015BE|PEIM|
|021|PchUsb         |6B4FDBD2-47E1-4A09-BA8E-8E041F208B95|003C2CE8|00036E|PEIM|
|022|NBPEI          |79AA6086-035A-4AD9-A89A-A6D5AA27F0E2|003C3058|0028B8|PEIM|
|023|SmmAccessPeim  |6ECFCE51-5724-450C-A38A-58553E954422|003C5910|000884|PEIM|
|024|SaInitPeim     |FD236AE7-0791-48C4-B29E-29BDEEE1A811|003C6198|005036|PEIM|
|025|CryptoPei      |D6D2FBA6-EF60-4C38-A83E-6769814D23B0|003CB1D0|002AC0|PEIM|
|026|BDRPEI         |90E9D266-C229-4474-8D18-AAF3745F3EAA|003CDC90|000546|PEIM|
|027|               |56E14F88-234B-4C34-B204-299670447247|003CE1D8|00046C|FRFM|
|028|DualBiosPei    |97BB442B-F9FE-45E3-8A28-439EEDCD1813|003CE648|000420|PEIM|
|029|Capsule        |FAC2EFAD-8511-4E34-9CAE-16A257BA9488|003CEA68|000998|PEIM|
|030|iFfsPei        |53F019E9-BB0C-424B-870A-1FAF10B1CB4C|003CF400|004170|PEIM|
|031|HeciPei        |9CF30325-DC5C-4556-A8B0-74215C5F7FC4|003D3570|000C18|PEIM|
|032|PchMeUma       |8C376010-2400-4D7D-B47B-9D851DF3C9D1|003D4188|00080E|PEIM|
|033|MePeiPolicyInit|12C67BE1-AD2E-4F13-A95F-6EDC2C4392DE|003D4998|000538|PEIM|
|034|PeiRamBoot     |08EFD15D-EC55-4023-B648-7BA40DF7D05D|003D4ED0|001082|PEIM|
|035|               |CC0F8A3F-3DEA-4376-9679-5426BA0A907E|003D5F58|0004A5|FRFM|
|036|               |9FE7DE69-0AEA-470A-B50A-139813649189|003D6400|00092C|FRFM|
|037|               |FD44820B-F1AB-41C0-AE4E-0C55556EB9BD|003D6D30|000828|FRFM|
|038|               |0DCA793A-EA96-42D8-BD7B-DC7F684E38C1|003D7558|0000A4|FRFM|
|039|               |3FD1D3A2-99F7-420B-BC69-8BB1D492A332|003D7600|0000A4|FRFM|
|040|               |1BA0062E-C779-4582-8566-336AE8F78F09|003FF140|000EC0|SECC|
+---+---------------+------------------------------------+--------+------+----+
| Bytes Free       : 027A98 (158 KB)    Bytes Used       : 078568 (481 KB)    |
+-----------------------------------------------------------------------------+
| Total Bytes Free : 03A260 ( 232 KB)   Total Bytes Used : 3C5DA0 (3863 KB)   |
+-----------------------------------------------------------------------------+
 

I thought I could find the module I want, disassebly that and find the point where it asks you to choose the three choices. Do you think that's possible? And what techniques do you use for recognizing the modules? I mean it easy with names like "MemoryInit", but that's not my case. It could be "Recovery", maybe. I really can't disassembly and try all of them because I'm not fluent enough with asm and each one takes me a loooot of time.

Quite messy, don't you think?
However, any help or suggestion or everything is appreciated.
Thank you in advance

reply

#2 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Fri Oct 02, 2015 11:34 pm

I investigate a little.

The module that manages the optimized/default values is AMITSE (GUID: B1DA0ADF-4F77-4070-A88E-BFFE1C60529A|00407892). I extracted it "as-is" in MMTool.

Guess what's at offset 00064590? B.I.O.S. .h.a.s. .b.e.e.n. .r.e.s.e.t. .-. .P.l.e.a.s.e. .d.e.c.i.d.e. .h.o.w. .t.o. .c.o.n.t.i.n.u.e....L.o.a.d. .o.p.t.i.m.i.z.e.d. .d.e.f.a.u.l.t.s. .t.h.e.n. .b.o.o.t....L.o.a.d. .o.p.t.i.m.i.z.e.d. .d.e.f.a.u.l.t.s. .t.h.e.n. .r.e.b.o.o.t....E.n.t.e.r. .B.I.O.S.
That's the message I don't want it to show.

I think I can open this module in Ida Pro, then looking to the parts where it prints this string, and the block of code I need to modify should be near this, right?

Do you guys have any suggestion about how to proceed?
Thank you very much

reply

#3 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Sat Oct 03, 2015 12:02 am

@ incud:
Welcome at Win-RAID Forum!

Zitat von incud2 im Beitrag #2
I think I can open this module in Ida Pro, then looking to the parts where it prints this string, and the block of code I need to modify should be near this, right?
Do you guys have any suggestion about how to proceed?

I am sorry, but I cannot help you, because I have never modified such System BIOS modules.

Regards
Dieter (alias Fernando)

My current System:
MB: ASRock X570 Pro4, CPU: AMD Ryzen 5 3600, System Drive: 500 GB Samsung 980 Pro, Graphics: Sapphire Radeon RX570, OS: Win10 x64 Pro
Donation Link:
If you are satisfied with my Forum activities, you can send a donation to my personal PayPal account by clicking onto >this< link.

reply

#4 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Sat Oct 03, 2015 4:49 pm

Zitat von Fernando im Beitrag #3
Welcome at Win-RAID Forum!

Thank you very much :)

Zitat von Fernando im Beitrag #3
I am sorry, but I cannot help you, because I have never modified such System BIOS modules.

Maybe, if you have some time, you can help me with the disassembly.

I opened the whole BIOS file with Ida PRO. Ida recognizes the start point and a few subroutine, but most of the bytes are confused data (because these data is the LZH compressed modules?) Then I tried to open the extracted module (AMITSE "as-is"). I choose "meta-pc" mode, 32bit.

I can find my string with Binary Search -> "bios has been reset" (unicode string), it's at offset 000645AFh (as the hex editor said). Now, I would like to find the point in the code where it prints/displays this string (address 000645AFh). Unfortunately, the string windows does not say anything (it reports only a few ascii string).

I try to set the default string encoding (Alt+A keys, "Set default encodings" at the bottom of the dialog) to UTF (both UTF8 and UTF16). Then I close and re-open the string windows. UTF16 mode lets me display over 2300 strings in chinese (I don't know if they have sense or not), UTF8 mode displays 2400 strings with no sense. I really can't make my string compare in the string window.

I try another thing: I search for the sequence of bytes "00 06 45" (the first part of the address of my string) to check if it appears somewhere. I use again the Binary search -> 000645 (without quotes this time). Nope. Then I check again with "45 06 00" (i forgot about endianness). Nope again.

Any suggestion? If you guys wants, I can upload the BIOS file + the module file + the .idb ida package
Thank you very much in advance

reply

#5 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Sat Oct 03, 2015 5:21 pm

Zitat von incud2 im Beitrag #4
Maybe, if you have some time, you can help me with the disassembly.

This is not a matter of time. I don't have the required knowledge about what you are going to try.

Zitat
Then I tried to open the extracted module (AMITSE "as-is").

If you want to modify any BIOS module, you should extract it "uncompressed" and not "as is".

reply

#6 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Sat Oct 03, 2015 5:47 pm

Zitat von Fernando im Beitrag #5
If you want to modify any BIOS module, you should extract it "uncompressed" and not "as is".

Zitat von Fernando im Beitrag #5
This is not a matter of time. I don't have the required knowledge about what you are going to try.

Clear. Thanks anyway :) Can you recommend me someone I can contact who deal with these things?

reply

#7 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Sat Oct 03, 2015 7:43 pm

Zitat von incud2 im Beitrag #6
Can you recommend me someone I can contact who deal with these things?

Our Forum members CodeRush and lordkag know much more about the BIOS modding than me, but I am unsure, if they have the time to help you.

reply

#8 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Sun Oct 04, 2015 11:14 am (Last edited: Sun Oct 04, 2015 11:43 am)

incud2

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Posts:	18
Registered since:	10.01.2015

Zitat von Fernando im Beitrag #7
Our Forum members CodeRush and lordkag know much more about the BIOS modding than me, but I am unsure, if they have the time to help you.

@lordkag @CodeRush I wait for your words of wisdom

However, the real problem is my lack of experience with Ida PRO. It should be easy to find the place where AMITSE display the string "Bios has been reset - ...", but I can't find it.
In addiction, neither me nor Ida PRO do not recognize the starting point of the code, so I cannot use features like the wonderful graph :(

I don't know if there's a way to debug the execution of the BIOS. I know that in certain point of the code, the software prints "checkpoints" on I/O port 80, but I cannot find a way they could be userful to me.
Well, there's a way: I can buy one of the PCI port-80 board, and look at the last checkpoint/word it prints on IO port 80 before if displays the message. If in the code there's a "out 80h, DISPLAYED_CODE", I could start to investigate from there, right? There are a couple of routines like this one:

1
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seg000:00037B7C sub_37B7C
seg000:00037B7C       proc near   ; CODE XREF: seg000:00029D6Dp
seg000:00037B7C                        ; sub_2E958+9Dp ...
seg000:00037B7C       mov     al, dl
seg000:00037B7E       mov     dx, cx
seg000:00037B81       out     dx, al
seg000:00037B82       retn
seg000:00037B82 sub_37B7C
seg000:00037B82       endp
 
 

Maybe I can follow the point where the software calls sub_37B7C. PS: The code is from an autoanalysis performed by Ida PRO. I still don't know if it's a piece of code or just data that Ida interpreted for unknown reason. However, this snippet seems to have sense.

Guys, you have much much (much) more experience than me. Do you think that what I'm trying to achieve is possible?

EDIT1: I forgot to say that if you need/want access to my dropbox folder where I have all my files (about this project, I mean) I can post the link

reply

#9 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Sun Oct 04, 2015 6:56 pm

I just have pretty much no time now, but I will return to this question tomorrow or in 2 days. Please standby. :)

reply

#10 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Sun Oct 04, 2015 9:28 pm

My official reaction to this international crisis is: WAT? And I'm replying in the nicest way possible, no offence intended. You mention of "low CMOS battery" in the title, then move on with saying "after inserting or removing battery". I'm trying to wrap my head around your issue and all I can see is either a search for the most complicated solution or a self-made problem. Maybe I need to spin my head faster. If the CMOS battery is failing, just replace the damn thing! It is a simple CR2032 battery, can be found at any decent electronics store, for the price of a loaf of bread. By looking at the pictures of your board, there is nothing complicated in replacing it. Listen to the Jedi motivational master, Just Do It! If you are removing the battery for any other reason, may I ask what it is? Do you place it in your pocket when you leave home, do you wash it daily, do you... ? Sorry for the slightly amusing/offensive tone, but I see no reason for removing the CMOS battery, apart from the obvious - reset CMOS. It is my impression that this action also forces the main BIOS chip to be flashed with the content of backup chip, yet another reason to avoid unnecessary physical degradation.

If nothing from above applies and you want to force a selection whenever you reset CMOS, to me it sounds like you are trying to create a non-existent issue: it is offering you a choice, not enforcing one. The string is placed in AMITSE, but AMITSE is made of several sections and IDA can only disassemble the first PE32+ section. There is no direct link (I think) between sections, the code uses a reference to the handlers. You may hunt this "issue" as much as you please, but I'm not interested in spending a single second. Like I said, I fail to see what the issue is, we are on different sides of the bug/feature coin.

reply

#11 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Sun Oct 04, 2015 10:08 pm (Last edited: Sun Oct 04, 2015 10:26 pm)

Zitat von CodeRush im Beitrag #9
I just have pretty much no time now, but I will return to this question tomorrow or in 2 days. Please standby. :)

I swear I heard in my head Ode To Joy while reading your comment :) thank you very much

Zitat von lordkag im Beitrag #10
You mention of "low CMOS battery" in the title, then move on with saying "after inserting or removing battery"

Sorry about that. My fault. I will explain it better later

Zitat von lordkag im Beitrag #10

If the CMOS battery is failing, just replace the damn thing!
may I ask what it is?
I see no reason for removing the CMOS battery

You completely missed the point.

This BIOS mod is a part of a larger project that has as an objective to obtain a very reliable machine. This machine - which is supposed to be always on and locked in a closet - must be able to restart in case of an unexpected shutdown (eg. when the power runs out). Most of the time, this machine is able to restart correctly. Other times (eg. CMOS battery low) it appears this prompt ("bios has been...") that prevents my machine from booting without human intervention. Changing the CMOS battery is not a solution because always requires human intervention.

When I'm at home, I simulate the run down of the battery/CMOS reset by removing and inserting again the battery. That's primary because I don't want to wait 10 years every time a run a test.

Zitat von lordkag im Beitrag #10
I'm not interested in spending a single second

Maybe after reading this explanation you will change your mind.
If you won't, no problem :) I know a man must choose his battles wisely.

Zitat von lordkag im Beitrag RE: Intel Management Engine: Drivers, Firmware & System Tools

@CPL0
I have also determined AMITSE as the module that loads the backup, by invoking a MeReFlash.

But I don't know if it is that easy to patch, as it has 7 occurrences. Should all be patched?

If you have dissassembly knowledge, maybe you could guide me a little. I have only patched the version so far (28h to 33h, 588h to 5BFh), in the hope that it might be enough. If it works, I could just nop and jmp for future updates to work. Do you think that all branches with MeReFlash should be avoided, or only some of them? ...

I read all your posts and I suppose you worked a lot on AMITSE. If you are interested in spending literally a second on this thread, linking me a resource that goes deep in the module would be beyond my wildest imagination :)

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#12 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Mon Oct 05, 2015 1:41 am

The difference between your first post and this one is like between night and day. Yes, for your situation it makes perfect sense to skip that screen and boot without a key press. But try to read it from my side, it sounded like you are either the laziest or the most complicated person alive. Maybe I will look into this in the next days. But don't expect any miracles, in the case of ME reflash I knew what to search and where, it was more or less easy to patch all three variations of ME recovery/reflash. In your case it might be difficult, as I believe only the handler is invoked and I can't even be sure if it is from inside AMITSE. Given how this system is important enough to be locked, have you considered Battery Backups/UPS Units? It should at least give you the time or the option to gracefully shutdown the system if the power is cut for longer periods, or to supply the system for short periods of time. Having the BIOS load the defaults and boot without human intervention is the next (not so) best thing. At least the board has DualBIOS, it should recover from any bad patching.

Just to be clear: Gigabyte GA-C1037UN is the board that needs to be patched? And what BIOS version: F2 from rev1.0 or FA from rev2.0? Because the code can change between versions and revisions. Lastly, will you be able to flash any modded BIOS and more than once if needed?

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#13 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Mon Oct 05, 2015 10:09 am

Zitat von lordkag im Beitrag #12
The difference between your first post and this one is like between night and day.

Sorry. My fault. I thought it wasn't necessary to explain the whole context.

Zitat von lordkag im Beitrag #12
have you considered Battery Backups/UPS Units?

It won't resolve the problem because there are other cases where the machine has to reboot. For example (but that's not the only one) when the software freezes, there's a watchdog timer that forces a reboot.

Zitat von lordkag im Beitrag #12

1. Gigabyte GA-C1037UN is the board that needs to be patched?
2. And what BIOS version: F2 from rev1.0 or FA from rev2.0?
3. Lastly, will you be able to flash any modded BIOS and more than once if needed?

1. Yes
2. F2 from rev1.0
3. Absolutely. As many times as you want

However, here's the news:
I found (I know you guys found it long before me) the Aptio source code. In Ivy-Bridge > 018s.zip > Core > EM > AMITSE there's a sort of documentation in .chm format. Maybe I can get some ispiration from it.

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#14 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Mon Oct 05, 2015 12:27 pm

Ok, I tried to make a simple modification to the AMITSE module, changing the string "bios has been.." with another of the same length (actually, I changed "BIOS has" with "INCUDhas"). When I try to replace the module in MMTool, it says "invalid .ffs file". That's because I forgot to change something else? It should be MMTool the one that has to change all the checksum, right?
I tried both Insert ("compressed") and replace (in replace there's no "as is" and "compressed" options).

I found a PCI Port 80 board. I know that AMI Aptio prints breakpoints while executing the bios.
I forces a CMOS reset, the last breakpoint displayed is 0xAB. According to >this document<, it should be in DXE phase, "Setup Input Wait". It makes sense.
Here's the screenshots:
The code displayed by the Port80 PCI board
The famous message shown
PS: I post the link because the images are very big, the width exceeds 1280px
I really don't know if this will help me. However, "melius abundare quam deficere" says latins.

Finally, the source code fact. I don't know if I'm totally blind, but I can't see anything interesting regarding AMITSE. I did not hoped to find the string "bios has been reset" hardcoded in the source (accordingly to the fact that AMITSE is one of the modules customized by the OEMs). Finding an "out 80h, 0xAB" would have been perfect. Then I realized that they're all C sources. However, I still hope to find that out instruction somewhere.
I uploaded the AMITSE documentation in .chm format >here<, in case someone want to see it. Just told me if it's a problem and I'll remove it.

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#15 | RE: Gigabyte GA-C1037UN UEFI/BIOS mod: how to load default/optimized settings in case of low CMOS battery datum

Mon Oct 05, 2015 2:20 pm

Zitat von incud2 im Beitrag #14
Ok, I tried to make a simple modification to the AMITSE module, changing the string "bios has been.." with another of the same length (actually, I changed "BIOS has" with "INCUDhas"). When I try to replace the module in MMTool, it says "invalid .ffs file". That's because I forgot to change something else?

You probably have to correct the Checksum-8 of the FFS file.
For comparison purpose you should check the checksum-8 of the extracted original FFS file.

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