Thank you very much for solving this riddle! And one more question for Rudolf: please tell, are you using atomDis utility to disassemble atombios into C code? Or there are some other special tools, which probably have more recent versions? (latest version of atomDis is already 4 years old...)
On 3 June 2015 at 20:27, Rudolf Marek <r.ma...@assembler.cz> wrote: > Hi all, > > First byte after IBM is usually a checksum. So in fact only two bytes > differ. > Now you may ask what it is... and it is a IOBASE :) > > typedef struct _ATOM_ROM_HEADER > { > ATOM_COMMON_TABLE_HEADER sHeader; > UCHAR> uaFirmWareSignature[4]; /*Signature to distinguish between > Atombios > and non-atombios,atombios should init it as "ATOM", don't change the > position */ > USHORT usBiosRuntimeSegmentAddress; > USHORT usProtectedModeInfoOffset; > USHORT usConfigFilenameOffset; > USHORT usCRC_BlockOffset; > USHORT usBIOS_BootupMessageOffset; > USHORT usInt10Offset; > USHORT usPciBusDevInitCode; > USHORT usIoBaseAddress; <---------------this changes > > I guess IOBASE of PCI device changes also... > > USHORT usSubsystemVendorID; > USHORT usSubsystemID; > USHORT usPCI_InfoOffset;. > USHORT usMasterCommandTableOffset; /*Offset for SW to get all command > table > offsets, Don't change the position */ > USHORT usMasterDataTableOffset; /*Offset for SW to get all data table > offsets, Don't change the position */ > UCHAR ucExtendedFunctionCode; > UCHAR ucReserved; > }ATOM_ROM_HEADER; > > You can use atomDis to dump it I guess (Did not check if it dumps also the > header. > > Thanks > Rudolf >
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