Question about COS 306 Computer Architecture Study.com Final assignment

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Another question! I've read that some people suggested that only doing Phase 1-2 and assembly programs is enough to pass the course, but how do we write a program without designing the control unit and ram and registers? Should the programs be executable based on the language that we are supposed to design but they never mentioned anything about OR the general format of assembly language that is executable on IDE like ASM or 8086 format? Gosh this thing is so confusing!!!