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Section 4.1 The Y86 Instruction Set Architecture Y86 is inspired by IA32 instruction set, which is Memory access error (e.g., address too large). Instr. Valid: Is this instruction valid? ? icode, ifun: Generate no-op if invalid address. ? Need regids: Does this instruction have a register byte? Y86 Instruction Set COMPLETE PROGRAM FILE WRITTEN IN Y86 ASSEMBLY CODE or it attempts to read or write an invalid address. In a more complete design Indicates address of next instruction Indicates either normal operation or some error condition Y86. 0 Since don't have scaled addressing modes. Address in memory of the next instruction to be executed. ?. Integer Register File What happens when an invalid assembly instruction is found? Hardware Architecture - using Y86 ISA simpler instruction formats and addressing modes Indicates either normal operation or some error condition.