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ECE 291. Lecture 1: Microprocessor Evolution & Organization Constantine D. Polychronopoulos Professor, ECE Office: 463 CSRL. Spring 2000. History of Microprocessors. First microprocessor introduced by Fairchild/Intel: 4004 & 4040, 4-bit proc.
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ECE 291 Lecture 1: Microprocessor Evolution & Organization Constantine D. Polychronopoulos Professor, ECE Office: 463 CSRL Spring 2000 ECE 291 -- Spring 2000
History of Microprocessors • First microprocessor introduced by Fairchild/Intel: 4004 & 4040, 4-bit proc. • Next generation was the 8-bit 8008 & 8080, Zilog Z-80, followed by the 16-bit 8088/8086. • 32-bit microprocessors introduced in 1986 by Intel as the 80386 (or 386) with 32-bit datapath and 32-bit mem. address. This was the beginning of the modern microprocessor. • Currently: 64-bit, 30M+ trans. ~1GHz, 4+-issue ECE 291 -- Spring 2000
486 Microprocessor 386-like Integer Processor 387 Numeric Co-processor 8Kb Cache The New Era with x486 - 486 was clocked at 50MHz, 66 MHz with memory at 33MHz - Half of instructions took 2 clocks and half 1 clock (20-25ns) - A later version at 100MHz and an overdrive 486DX4 were introduced in the early 90’s. ECE 291 -- Spring 2000
Intel Family of Microprocessors ECE 291 -- Spring 2000
Pentium Pro Microprocessor Datapath3 Datapath2 Datapath1 64Kb Split (I & D) Cache Superscalar & VLIW Processors Merced - 64-bit EPIC Datapath4 Datapath2 Datapath3 Datapath1 64 Predicate Registers 128 Int. Registers 128 FP Registers >512Kb Split (I & D) Cache ECE 291 -- Spring 2000
Cache Microprocessor Organization of a Computer (PC) Memory System System (Memory) Bus Tape Console Disk I/O System PCI (Peripheral Component Interconnect) bus in most of current PCs ECE 291 -- Spring 2000
BUS Standards PCI: Peripheral Component Interconnect (General memory bus) USB: Universal Serial Bus (Special I/O bus 10-100Mbps) AGP: Advanced Graphics Port (Graphics I/O bus - > 533Mbps) USB & AGP work in conjunction with the PCI bus ECE 291 -- Spring 2000
Modern Microprocessor Architecture I-cache Registers Memory Manag.Unit Control Unit Datapath Bus Interf. Unit Branch Prediction D-cache Microprocessor Architecture D-cache (Memory) Decode & Oper. fetch I-Fetch I-cache Execute Alignment Commit Instruction Execution ECE 291 -- Spring 2000
I-Fetch I-Fetch I-Fetch Decode & Oper. fetch Decode & Oper. fetch Decode & Oper. fetch Memory Memory Memory Write Back Write Back Write Back Execute Execute Execute Pipelining Before: Instruction 1 Instruction 2 Instruction 3 NOW: Clock 1 Clock 2 Clock 3 ECE 291 -- Spring 2000
Processor Registers • ALU registers (AX) • User (GP) registers • Special (user) registers • System registers (used by OS) • System registers/buffers (used by I/O system) ECE 291 -- Spring 2000
Memory System • Memory system architecture • Memory bus • Memory Map (memory layout) • BIOS & bootstrapping • OS kernel • I/O drivers & I/O operations ECE 291 -- Spring 2000