AH = 29h Returns: AL = current mode Reset disk system
MOV AX, 0xA000 MOV ES, AX MOV DI, 0 ; row 0, col 0 (character cell) MOV AL, 'A' MOV ES:[DI], AL But VRAM is planar: you must handle 4 planes for graphics. Prints "Hello" using BIOS INT 18h AH=24h: pc-98 bios
AH = 42h (same registers as read)