Chapter 18....

Getting the DOS Version

You will see also how to get parameters from the command line.

Output Special Symbols

BIOS and DOS provide facilities to output text.

Mastering Hardware

Using the BIOS Data area, we can turn off the keyboard NumLock LED.

Using ROM BIOS Data

You cannot change the information stored there however, you can read it into RAM to process.

Using ROM BIOS Routines

Your programs can also access these routines to perform special tasks.

Locating Interrupt Handlers

This program can help you locate the handlers for all 256 possible interrupts.

Direct Access to the IVT

Using segments with a fixed starting address to access a particular area in the memory can be very useful.

User Interrupt Handlers

Now we should be able to write and install our first interrupt handler.

Monday, February 12, 2007