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Question: How come the microcode ROMs are 22 bits wide, yet the opcodes are 16 bits wide? (AS documented in the WP16/CP1600 manuals.) Larsbrinkhoff (talk) 11:16, 25 March 2018 (CEST)

Just a guess, but it is microcode; some of the other bits may control other stuff on the board? The prints probably say (they are available for both the dual- and quad-width LSI-11 CPU cards. Jnc (talk) 14:28, 25 March 2018 (CEST)