They both use 114-pin PGA package, but some pins are different, (Vcc and gnd are placed differently in the pinout), and you need an adapter!
My board's socket is designed for M68EC020, but I need to use a M68020 chip because only the goldcap version, i.e. MC68020RC33 114-pin ceramic PGA, is available at 33Mhz.
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CPU: MC68020 114-pin PGA ----[adapter] ---> socket: MC68EC020 114-pin PGA
Do you happen to know *where* I can find an adaptor M68020-PGA to M68EC020 PGA?
Do you happen to have for sale?
here I am