I find it difficult to believe you searched for these at all 1. http://www.alldatasheet.co.kr/datasheet-pdf/pdf_kor1/NTE/NTE6889.htm The mc6889 is aka 8t28, or nte 6889
2 http://www.kando.hu/Periferiak/kod22.htm 3. I've left you the easiest one. Do it yourself. -- All the Best Declan.
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