INT 10

INT 10

INT 10 is shorthand for "interrupt 0x10" or "interrupt 10h" and is the 17th interrupt vector (interrupts begin at 0, and are usually specified as hexadecimal values). This corresponds to the BIOS interrupt call for video services. Such services include setting the video mode, character and string output, and graphics primitives (reading and writing pixels in graphics mode). To use this call, load ah with the subfunction you want to use, load other parameters in the other registers, and make the call. INT 10h is fairly slow, so many programs bypass this BIOS routine and access the display hardware directly. Setting the video mode, which is done infrequently, can be accomplished by using the BIOS, while drawing graphics on the screen in a game needs to be done quickly, so direct access to video ram is more appropriate than making a BIOS call for every pixel.

List of supported functions

References

* [http://www.ctyme.com/intr/int-10.htm Int 10h from Ralf Brown Interrupt List, online version]

ee also

*BIOS interrupt call
*INT 13
*mode 13h


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