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Added missing return value for INT 0x10 AX=0x4F15 BL=0x00 (VESA VBE/DDC INSTALLATION CHECK / CAPABILITIES). #26

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Merged
shidel merged 1 commit into from
Apr 5, 2026
Merged

Added missing return value for INT 0x10 AX=0x4F15 BL=0x00 (VESA VBE/DDC INSTALLATION CHECK / CAPABILITIES). #26

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14 changes: 10 additions & 4 deletions ... 80286/INT 104F15BL00 VESA VBEDC Display Data Channel INSTALLATION CHECK CAPABILITIES.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -11,9 +11,15 @@ INT 10 - VESA VBE/DC (Display Data Channel) - INSTALLATION CHECK / CAPABILITIES
ES:DI = 0:0
Return: AL = 4Fh if function supported
AH = status
00h successful
BX = ???
01h failed
???
00h successful
01h failed
BH = Rounded-up approximate time in seconds to transfer one EDID block.
BL = DDC Level Supported
bit 0: DDC1 supported
bit 1: DDC2 supported
bit 3: Screen blanked during transfer
CX = unchanged
ES:DI = unchanged

SeeAlso: AX=4F15h/BL=01h,AX=4F15h/BL=02h