ECE 120 Lecture 28: lecture_28

• School: University of Illinois
• Department: Electrical and Computer Engineering
• Course: ECE 120
• Professor: Kindratenko Volodymyr

Document Summary

In this course we will study a computer, called little machine 3, or lc-3 which is an implementation of the basic von neumann architecture. The global bus: lc-3 global bus consists of 16 wires and associated electronics. The alu and the register file: the alu is the processing element. One of the inputs can also be supplied directly from the ir, controlled by the. It then is stored in the register file and. Processed by additional circuitry to generate the condition codes n,z,p: the register file consists of 8 16-bit registers. It can supply up to two values via its two output ports. It can store one value, coming from the bus. Read/write access to the register file is controlled by the 3-bit resister signals, Dr, sr1, sr2: the pc supplies via the global bus to the mar the address of the instruction to be fetched at the start of the instruction cycle.