Processor+Development+(AH)

Write a blog post describing and comparing the key processors through time. Your post should include some of the following processors:


 * Intel 4004
 * Intel 8080
 * Motorola 6502
 * Zilog Z-80
 * Intel 8086
 * Intel 80286
 * Intel 80386
 * Intel 80486
 * Intel Pentium
 * Intel Pentium Pro
 * Motorola 68000
 * Intel IA-64

Key points to consider are:
 * Year
 * Type (bits)
 * Clock speed
 * Data bus
 * Address bus
 * Addressable memory
 * Registers
 * Cache
 * Instruction set
 * Addressing modes
 * Features