X86 Assembly Language

1
X86 Assembly Language

• Same Assembly Language for 8086,80286,80386,80486,
  Pentium I II and III
• Newer Processors add a few instructions but
  include all instructions from earlier processors

2
CISC (X86) vs. RISC (MIPS)

• CISC machines have fewer registers
• CISC machines have more addressing modes one
  operand can be memory (no LW or SW)
• CISC machines have more instruction formats and
  they vary in length
• CISC machines have more instructions
• Programs require fewer CISC instructions than
  RISC but time/instruction is longer
• With pipelining and dynamic execution, a CISC
  instruction set is perhaps 10-20 slower than RISC

3
Assembly Resources (Free)

• Free AMD X86 manuals
• http//www.intel.com/design/pentiumii/manuals/2431
  9102.PDF

4
Celeron PIII P6 Core

• Celeron Home Page http//www.intel.tm.za/design/ce
  leron/index.htm
• P6 Core Manual http//www.intel.tm.za/design/penti
  umII/manuals/244001.htm