Kareem Abdul-Jabbar scored 28 points and Magic Johnson handed out 14 assists yesterday in Inglewood, Calif., as the Los Angeles Lakers continued their NBA playoff roll with a 130-116 victory over the Dallas Mavericks in the opening game of their NBA Western Conference semifinal series.

The second game of the best-of-seven series will be played here Wednesday night.

The Lakers, who eliminated the San Antonio Spurs in the first round with three one-sided victories, scored at will in the opening 6 1/2 minutes, opening a 22-6 advantage. Despite a 10-0 streak by Dallas, Los Angeles held a 30-17 lead by quarter's end.

Los Angeles, the defending NBA champion, led by 66-48 at the half and by 95-80 after three quarters.

Said Mavericks Coach Dick Motta: "I'd rather be the Lakers. They are on a mission. Today I felt helpless. We know we are in a difficult situation."

Said Lakers Coach Pat Riley: "We did exactly what we wanted to do."

Byron Scott scored 24 points for Los Angeles, Worthy 23 and Johnson 16. Reserve Jay Vincent scored 18 points to lead Dallas.

*Celtics 103, Hawks 91: Kevin McHale and Larry Bird sparked a 14-point run that helped Boston pull away from visiting Atlanta in the third quarter and go on to an opening-game victory in the Eastern Conference semifinal series.

The Celtics set a single-season league record of consecutive home victories, including the playoffs, with 34. They broke the Minneapolis Lakers' mark that had stood since 1949-50.

Boston, which won all six of its regular-season games against the Hawks, can extend the record Tuesday night in the second game of the best-of-seven series.

The Celtics, who never trailed, led by 52-46 at halftime and by 68-59 before Bird began the 14-0 surge with a reverse layup with 4:50 left in the third quarter. McHale got the next five points on a goaltending call and a three-point play.

Boston outscored Atlanta by 34-17 in the quarter, outshooting the Hawks from the field, 68 percent to 32 percent.

"In the third quarter, they had six fast-break opportunities and scored on all of them for 12 points," Hawks Coach Mike Fratello said. "We had three fast-break opportunities and didn't score on any of them.

"That's one small reason why you may get burned 34-17."

The Celtics were led by McHale with 24 points, Danny Ainge with 17 and Bird, Robert Parish and Dennis Johnson with 16 each.

The Hawks were led by Kevin Willis with 18 points. Dominique Wilkins, who led the NBA in scoring with a 30.3 average and averaged 34.7 points against Boston in the regular season, had only four field goals and 13 points.