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 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 Assembly Resources (Free) • Free AMD X86 manuals • http://www.intel.com/design/pentiumii/man uals/24319102.PDF Celeron & PIII – P6 Core • Celeron Home Page http://www.intel.tm.za/design/celeron/index. htm • P6 Core Manual http://www.intel.tm.za/design/pentiumII/ma nuals/244001.htm
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