INT 10h, 0Dh (13) Read Pixel
Reports the color of the pixel at a specified screen coordinate.
On entry: AH 0Dh
CX Horizontal position of pixel
DX Vertical position of pixel
BH Display page number (graphics modes with
more than 1 page)
Returns: AL Color of pixel
Registers destroyed: AX, SP, BP, SI, DI
──────────────────────────────────────────────────────────────────────────
Legal values
Mode CX (Horizontal) DX (Vertical) AL (Pixel Color) BH (Page Number)
04h 0-319 0-199 0-3
05h 0-319 0-199 0-3
06h 0-639 0-199 0-1
0Dh 0-319 0-199 0-15 0-7
0Eh 0-639 0-199 0-15 0-3
0Fh 0-639 0-349 0-1 0-1
10h 0-639 0-349 0-15 0-1
──────────────────────────────────────────────────────────────────────────
Notes: For modes 0Dh through 10h, a page number needs to be
supplied in BH.