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本文为解决MC 68000 ECB 16位单板机的1/0接口问题,利用MC6821分别构成16位、8位并行口,已经实用。
In order to solve the problem of 1/0 interface of MC 68000 ECB 16-bit single board machine, it is practical to use MC6821 to form 16-bit and 8-bit parallel ports respectively.