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VESA Video Modes: Difference between revisions
Add note on return values
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== VESA Functions ==
You'll want to look in the VESA VBE docs for these functions:
All VESA functions return 0x4F in AL if they are supported and use AH as a status flag, with 0x00 being success. This means that you should check that AX is 0x004F after each VESA call to see if it succeeded.
;INT 0x10, AX=0x4F00
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vbeInfoBlock *vib = dos_alloc(512);
v86_bios(0x10, {ax:0x4f00, es:SEG(vib), di:OFF(vib)}, &out);
if (out.ax!=0x004f) die("
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