SILICON SYSTEMS INC <SLCN> 2ND QTR MARCH 28 Shr profit five cts vs profit two cts Net profit 325,000 vs profit 105,000 Revs 19.5 mln vs 16.1 mln Six Mths Shr profit nine cts vs loss 35 cts Net profit 627,000 vs loss 2,280,000 Revs 36.9 mln vs 27.4 mln