Mindscape Inc reports earnings for Qtr to June 30 "LEAD: *3*** COMPANY REPORTS ** *3* Mindscape Inc Qtr to June 30 1988 1987 Revenue 5,436,000 4,234,000 Net loss 281,000 b309,000 Share earns - .09 6mo rev 10,449,000 7,720,000 Net loss 440,000 b93,000 Share earns - .04 b-Net income *3*** COMPANY REPORTS ** *3* Mindscape Inc Qtr to June 30 1988 1987 Revenue 5,436,000 4,234,000 Net loss 281,000 b309,000 Share earns - .09 6mo rev 10,449,000 7,720,000 Net loss 440,000 b93,000 Share earns - .04 b-Net income"