Finish the 1st shoot'em-up section then on the screen that follows
(The Armoury), move the pointer to the box with the word shield in it
(upper left hand corner).  Now hold down the '+' key on the numeric
keypad and press fire.  Allocate all energy to the weapons.  The
following keys will now be available during play:

              'F6'_________________Replenish life meter.
              'F1'__________Finish shoot'em up sections.
              '2'-'9'____________________Select weapons.
              '0'________________________Another weapon.
              '-'________________________Another weapon.
              '='________________________Another weapon.
              '1'___________________Remove extra weapon.