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i have a sivava willem 4.5c pcb and MCS 51/avr adapter i can read and program a 20 pin at90s2313 but it doesnt even id the 8515 can anyone offer any advice as to where im goin wrong???

No experience on mentioned chip.
Try with SW option - tick New Adapter.
What design of your MCS51/avr adapter, where purchased ?
Read topics in old Willem forum, search

i bought the adapter from sivava.com i tried with new adapter ticked and unticked it still will not give a good chip id

MCS 51 / AVR + PLCC44 Adapter Version.2

http://www.sivava.com/buynow.php?pd=B11

thats the adapter