Add even more debug messages
Add even more debug messages

The UFO game is trying to render stuff at absurd positions. This makes
my rendering going way outside its jurisdiction on the Chip-8 screen. I
represent its matrix as linear array of 2048 pixels (64 * 32). The game
is trying to render pixels at positions like 8601 and this causes
segmentation faults.

Now, obviously the game has been around for 20+ years and is working
properly. I probably have some problems with the opcodes dealing with
the registers, for me to even try to draw such coordinates.

gsamokovarov/chip8.c,gsamokovarov/chip8.c