Chapter 8 Input/Output

This chapter presents the I/O features of the 80386 from the following perspectives:

• Methods of addressing I/O ports

• Instructions that cause I/O operations

• Protection as it applies to the use of I/O instructions and I/O port

       addresses.
  

• 8.1 I/O Addressing
• 8.1.1 I/O Address Space
• 8.1.2 Memory-Mapped I/O
• 8.2 I/O Instructions
• 8.2.1 Register I/O Instructions
• 8.2.2 Block I/O Instructions
• 8.3 Protection and I/O
• 8.3.1 I/O Privilege Level
• 8.3.2 I/O Permission Bit Map

• Figure 8-1. Memory-Mapped I/O
• Figure 8-2. I/O Address Bit Map