Additional information on programming in assembler language can be found at:
This website provides resources to help you learn to program in Intel Assembler
Intel Assembler 80x86 Code Table, a very useful compact list containing all instructions.
An online PC Assembly Tutorial
This provides an index to the Intel manuals that describe the all the Pentium instruction in excruciating detail. The first volume describes the architecture of the Pentium. Volumes 2A and 2B contain the details of the instructions.