BASIC INPUT OUTPUT SYSTEM - Yale University
Basic Input Output System - BIOS 2 BIOS Purpose The design of any computer requires that many of the hardware elements of the machine be located at specific addresses within the range of input/output ports of the computer.
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Data Representation Chapter One - Yale University
flint.cs.yale.eduData Representation Chapter One Probably the biggest stumbling block most beginners encounter when attempting to learn assembly language is the common use of the binary and hexadecimal numbering ... Most modern computer systems (including the IBM PC) operate using binary logic.
MS-DOS, PC-BIOS, and File I/O Chapter 13 - Yale University
flint.cs.yale.eduYou can access the IBM PC system hardware at one of three general levels from assembly language. You can program the hardware directly, you can use ROM BIOS rou-
I Executable and Linkable Format (ELF)
flint.cs.yale.eduObject files participate in program linking (building a program) and program execution (running a pro-gram). For convenience and efficiency, the object file format provides parallel views of a file’s contents, reflecting the differing needs of these activities. Figure 1 …
Appendix C: Keyboard Scan Codes - Yale University
flint.cs.yale.edub. Pressing the PrtSc key does not produce a scan code. Instead, BIOS executes an int 5 instruction which should print the screen. c. This is the control-P character that will activate the printer under MS-DOS. d. This is the minus key on the keypad. e. This is the plus key on the keypad. N 31 6E4E0E3100 6E 4E 6E 4E M 32 6D4D0D3200 6D 4D 6D 4D
Lecture 16: Storage Devices - Yale University
flint.cs.yale.eduAbstraction on top of persistent storage – Magnetic disk – Flash memory (e.g., USB thumb drive) Devices provide – Storage that (usually) survives across machine crashes – Block level (random) access – Large capacity at low cost – Relatively slow performance
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