INT 10,D - Read Graphics Pixel at Coordinate

AH = 0D

BH = page number, see ~VIDEO PAGES~

CX = column number (zero based)

DX = row number (zero based)

on return:

AL = color of pixel read

- 64K IBM EGAs with BIOS dated 9/13/84 in 350 line video

modes, return invalid data in AL

- page number in BH ignored for 320x200 4 color graphics mode