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        [log] <1036> starting window manager
        [log] <1036> setting video mode to 800x600x24
        [log] <1036> VBE setting mode
        [log] <1036> VBE sending request
  [scheduler] waiting for all threads of process 1000 to exit: all finished
        [log] <1036> VBE sent request
        [log] <1036> VBE receiving with topic
        [log] <1021> got lower memory block 32268
  [exception] invalid operation code in task 1060 (process 1060)
                 eip: 0x00009130   eflags: 0x00030246
                 eax: 0x00008900      ebx: 0x00000000
                 ecx: 0x00000000      edx: 0x000076BE
                 esp: 0x00000FF6   state@: 0xFD005FA8
                intr: 0x00000006    error: 0x00000000
  [exception] process 1060 killed due to invalid operation code 0x000000FF
        [log] <1021> could not load VBE info block
        [log] <1021> vbe: unable to switch to video mode 800x600x24
        [log] <1036> VBE received with topic
        [log] <1036> VBE received false
        [log] <1036> VBE driver reported that mode-set was not successful, quitting window manager

Code: Select all

// FP-Macros
#define FP_SEG(fp)        			(((FarPointer) fp) >> 16)
#define FP_OFF(fp)        			(((FarPointer) fp) & 0xffff)
#define LINEAR_TO_FP(linear)		((linear > 0x100000) ? 0 : ((((linear >> 4) & 0xFFFF) << 16) + (linear & 0xFL)))

...

bool loadVbeInfo(VbeInfoBlock* target) {

	ghost::Virtual8086Registers out;
	ghost::Virtual8086Registers in;

	FarPointer vbeInfoBlockFp = LINEAR_TO_FP((uint32_t ) target);

	in.ax = 0x4F00;
	in.bx = 0;
	in.cx = 0;
	in.dx = 0;
	in.es = FP_SEG(vbeInfoBlockFp);
	in.di = FP_OFF(vbeInfoBlockFp);
	in.ds = 0;
	in.si = 0;

	ghost::SystemCalls::callVm86(0x10, in, out);

	return (out.ax == 0x4F);
}