Space Raiders: Data at 26721

This is set 1 when the fire key is released. It's set 0 when the fire key is pressed. If it's found to be 0 when the fire key is read as pressed the fire-pressed flag is held at 0. In order words the fire-pressed flag will only go true when this is 1, and it's only set 1 when the fire key is found to be released

This is set 1 when the fire key is released. It's set 0 when the fire key is pressed. If it's found to be 0 when the fire key is read as pressed the fire-pressed flag is held at 0. In order words the fire-pressed flag will only go true when this is 1, and it's only set 1 when the fire key is found to be released
_FIRE_RELEASED	26721	DEFB 0	Fire released flag, local to keypress routine