Human computer
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The human computer simulation illustrated how a computer executes a program. Students took on roles that represented different components of a computer, such as memory, registers, accumulator, and ALU. The program counter informed the messenger of the next instruction address. The messenger retrieved instructions and data from memory and registers. Instructions were executed, such as loading values from memory into registers or performing arithmetic operations in the ALU. This process repeated until the program finished, allowing students to experience how computer hardware works together to run programs step-by-step.
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- 1. THE HUMAN COMPUTER Last September 23, 2013, the BS Computer Science II students taking up Computer System Organization performed as the human computer. The roles performed are: memory, data, register, program counter, instruction register, accumulator, ALU, opcode, and messenger. The play illustrated how the computer executes a program. According to William Stallings, the basic function performed by a computer is execution of the program, which consists of set of instructions stored in memory. He stated that instruction processing is consists of two steps, the processor reads (fetches) the instructions from memory one at a time and executes each instruction. This program execution is consists of repeating the process of instruction fetch and instruction execute. During the play, the Program Counter which holds the address of instruction to be fetched next informed the Messenger. The messenger then traveled to Register (201) and asked for his content (1740).The content (1740) is then loaded to Instruction Register (it contains the instruction to be executed). The instruction specifies that the Accumulator is to be loaded with the content of the memory address 740 which is 0001. After messenger this, is the then Program informed. Counter The is incremented messenger and againtraveled the to Register(202) and asked for his content (5740).The content (5940) is
- 2. then loaded to Instruction Register .The instruction is that the old content of the Accumulator (0001) is to be added with the content of the memory address 741 which is 0004. The ALU performed the operation and the result is then loaded to Accumulator (0005). Again, the Program counter is incremented. The messenger is informed so it went toRegister(203) and asked for its content (2741). The content (2741) is then loaded to Instruction Register, then content of the Accumulator (0005) is loaded to memory address 741. The role play is a perfect way for the students to further understand how the program is executed. Thanks to the guidance of our instructor we were able to perform the play.