In the old days of basic you could use a POKE to read a set of 8 numbers stored in DATA to change the character on a keyboard. i.e. if you asked the computer to print an 'a' in this mode it could show whatever your data was i.e. a smiley face, a car etc, Very basic 1 colour graphics, but a good starting point for a program.
Is there any way of using a similar instruction to make a simple graphics in C++?