INT 10,3 - Read Cursor Position and Size

AH = 03

BH = video page

on return:

CH = cursor starting scan line (low order 5 bits)

CL = cursor ending scan line (low order 5 bits)

DH = row

DL = column

- returns data from ~BIOS DATA AREA~ locations 40:50, 40:60 and 40:61

- the ~6845~ can also be used to read the cursor position

- the return data can be circumvented by direct port I/O to the 6845

CRT Controller since this function returns the data found in the

BIOS Data Area without actually checking the controller