5F68h – System BIOS Callback

This is a generic function that allows SoftBIOS to do any system callbacks through INT 15h. The Input/Output of this function is dependent on the definition of the desired INT 15h hook except for the EAX register.

Calling Registers:

AX = 5F68h, System BIOS Callback Function

EAX bits 31:16 = System BIOS INT 15h Hook Function

Return Registers:

AX = Return Status (function not supported if AL != 5Fh):

= 005Fh, Function supported and successful

= 015Fh, Function supported but failed