thanks a lot for d suggestion . i have replaced e_prev2 e_prev1 . yes it was an error but then also it was still giving same result . then i tried using variable inside process then the output of pid was undefined for all the clock cycles. pls help

Filename	Size	Update
Data logic\computer_organization_and_design_fundamentals.pdf	1643319	2016-09-19
Data logic\DH_lect6_FFs_FSM.pdf	465528	2016-09-19
Data logic\lecture data seq.pdf	1185351	2016-09-20
Data logic\lecture_2.pdf	621902	2016-09-19
Data logic\lecture_3.pdf	479907	2016-09-19

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