SUBROUTINE ZAP
	INCLUDE 'TREK.COM/-LI'
	INCLUDE 'TREK2.COM/-LI'
      INTEGER CDAM(5) 
      EQUIVALENCE (CRACKS(1),HIT),(CRACKS(3),IHURT),(CRACKS(4),L) 
      PFAC=1.0/INSHLD 
      CHGFAC=1.0
      IF(SHLDCH .EQ. 1) CHGFAC=0.25+0.50*RANF(0) 
      IF(SHLDUP .EQ. 0 .AND. SHLDCH .EQ. 0) GO TO 10 
      PROPOR=AMAX1(PFAC*SHLD,0.10)
      HITSH=PROPOR*CHGFAC*HIT+1.0 
      ABSORB=0.8*HITSH
      IF(ABSORB .GT. SHLD) ABSORB=SHLD
      SHLD=SHLD-ABSORB
      IF(SHLD .LE. 0.0) SHLDUP=0
      HIT=HIT-HITSH 
      IF(PROPOR .GT. 0.1 .AND. HIT .LT. (0.005*ENERGY)) RETURN
C--------IT'S A HIT!  PRINT OUT HIT SIZE
 10   IHURT=1 
      CALL CRAMF(HIT,8,2) 
      CALL CRAM(9H UNIT HIT)
      IF(L .EQ. 0) GO TO 15 
      CALL CRAM(6H FROM ) 
      JX=KX(L)
      JY=KY(L)
      CALL CRMENA(QUAD(JX,JY),0,JX,JY) 
 15   CALL CREND
C--------DECIDE IF HIT IS CRITICAL
      IF(HIT .LT. (275.0-25.0*SKILL)*(1.0+0.5*RANF(0))) GO TO 60
      NCRIT=1.0 + HIT/(500.0+100.0*RANF(0)) 
      CALL CRAM(17H***CRITICAL HIT--) 
C--------SELECT DEVICE(S) AND CAUSE DAMAGE
      KTR=1 
      DO 50 LL=1,NCRIT
 20   J=NDEVIC*RANF(0)+1.0 
      IF(DAMAGE(J) .LT. 0) GO TO 20 
C*--------CHEAT TO PREVENT DEATHRAY FROM BEING DAMAGED.    
      IF(J.EQ.14) GOTO 20   
C--------CHEAT TO PREVENT SHUTTLE DAMAGE UNLESS ON SHIP.
      IF((J .EQ. 10) .AND. (ISCRFT .NE. 1)) GO TO 20 
      CDAM(LL)=J
      XTRADM=(HIT*DAMFAC)/(NCRIT*(75.0+25.0*RANF(0)))
      DAMAGE(J)=DAMAGE(J)+XTRADM 
      IF(LL .EQ. 1) GO TO 40
      DO 30 LLL=2,LL
      IF(J .EQ. CDAM(LLL-1)) GO TO 50 
 30   CONTINUE
      KTR=KTR+1 
      IF(KTR .EQ. 3) CALL CREND 
      CALL CRAM(5H AND )
 40   CALL CRAMS(DEVICE(1,J),16)
 50   CONTINUE
      CALL CRMDMP(9H DAMAGED.) 
C--------PRINT MESSAGE IF SHIELDS WERE UP AND GOT KNOCKED DOWN
      IF(DAMAGE(8) .EQ. 0) GO TO 60 
      IF(SHLDUP.NE.0) CALL PROUT(24H***SHIELDS KNOCKED DOWN.,24) 
      SHLDUP=0
 60   ENERGY=ENERGY-HIT 
      RETURN      
      END