SUBROUTINE SOLVSMBE(SMV1,SMV2,SMA11,SMA22,SMA1,SMA2,SMB11,SMB22)  
C  
C SOLVE 2X2 MATRIX  
C CHANGE RECORD  
C  
      SMA12 = -SMA2  
      SMA21 = -SMA1  
      SMDET = SMA11*SMA22 - SMA12*SMA21  
      IF(SMDET.EQ.0.0)THEN  
        PRINT*, 'SINGULAR MATRIX: A11, A12, A21, A22, B11, B22'  
        PRINT*, SMA11,SMA12,SMA21,SMA22,SMB11,SMB22  
        STOP  
      ENDIF  
      SMDET = 1.0 / SMDET  
      SMV1 = (SMB11*SMA22 - SMB22*SMA12) * SMDET  
      SMV2 = (SMB22*SMA11 - SMB11*SMA21) * SMDET  
      RETURN  
      END