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ECE291 Computer Engineering II Lecture 7

ECE291 Computer Engineering II Lecture 7. Josh Potts University of Illinois at Urbana- Champaign. Outline. Program Stack PUSH & POP instructions Procedures Macros Macros vs procedures. Stack Key Characteristics. Used to store temporary data during program execution

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Introduction to Interrupts

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Chaining Interrupts

Chaining Interrupts. Short contents. What does chaining interrupts mean? TSR programs Chaining an interrupt example program Reentrancy problems with DOS Reentrancy problems with BIOS The multiplex interrupt (INT 2Fh) Installing and removing a TSR Debugging TSRs

391 views • 25 slides

Chapter 9 80x86, Large Model Port

Chapter 9 80x86, Large Model Port. Porting to real mode and for the large model Real mode: 1Mb memory space (pointers in this model require 32 bits) In real mode, all registers are 16 bits wide, and they all need to be saved during a context switch. Figure 9.1 80x86 real-mode register map.

358 views • 20 slides