This paper presents an instruction set simulator of an 8-bit, MCS-51 compatible CPU core, and shows how to use it in embedded software development process; Method to control and debug CPU using ...

ALU Decoder generates the ALUControl signals to drive ALU in datapath. It also generates FlagW (2-bit) signal (to be used by Conditional logic) which is used to define if only N, Z flags can be set, ...