N64 Code Types
ACTIVATOR BUTTONS 

16-bit
0000 = No buttons
0001 = C-right
0002 = C-left
0004 = C-down
0008 = C-up
0010 = R button
0020 = L button
0100 = D-pad right
0200 = D-pad left
0400 = D-pad down
0800 = D-pad up
1000 = Start button
2000 = Z trigger
4000 = B button
8000 = A button

8-bit
00 = No buttons
01 = D-pad right
02 = D-pad left
04 = D-pad down
08 = D-pad up
10 = Start button
20 = Z trigger
40 = B button
80 = A button 

8-bit (Activator-code ends on a odd number)
00 = No buttons
01 = C-right
02 = C-left
04 = C-down
08 = C-up
10 = R button
20 = L button

Source: http.//www.all-xplorer.com/faq/N64CodeTypes.html

Edited by kai666.com
06-09-2004