For cheats in this game, use the DOS utility DEBUG.  First
 backup your game to be edited, then type the following from
 the dos prompt:

 ren e:\shinobi.exe cheater.cht
 debug e:\cheater.cht
 For infinate lives, type:
 e ce1 90 90 90 90
 For inf magic, type:
 e 54a3 90 90 90 90
 To stop timer, type:
 e 6b19 eb 8
 w
 q

 Then rename CHEATER.CHT back to its previous name.