In a message dated 3/28/99 7:00:32 PM Eastern Standard Time, v8r@juno.com writes: > How do you derive 20, 40 from $2814 bc is a 2 byte register, b and c (each 1 byte) $28 (in hexadecimal-base 16) = 40 (in decimal-base 10) $14 (hex) = 20 (decimal) thus b=40 and c=20 so the x coordinate is 20 and the y coordinate is 40 i hope you understand hexadecimal...