VocExile/Programming Topics/Interrupts

A Listing of BIOS and MSDOS Interrupts

A listing of all of the MSDOS and BIOS interrupts for PC computers from 00 to FF is available as a free download, or on a 3 1/2" disk. Contact me at the Email address shown at the bottom of this page.

The listing, which takes up 200K of disk space, was completed in 1988. The MSDOS interrupts, probably for version 5, should be compatable with Windows 95, and 98 and later versions, since programs designed to run with MSDOS 5 are supposed to work with those operating systems. Please note that some of these interrupts may have been superceded by new ones since this list was compiled.

A small excerpt from this listing is shown below.

-----------------------------------------------------------
INT 10 - VIDEO - WRITE ATTRIBUTES/CHARACTERS AT CURSOR POS
........AH = 09h
....... AL = character
....... BH = display page - alpha modes
....... BL = attributes of char (alpha modes) or color (graphics modes)
..........if bit 7 == 1 in graphics mode, character is xor'ed onto screen
....... CX = number of times to write character
-----------------------------------------------------------
INT 10 - VIDEO - WRITE CHARACTERS ONLY AT CURSOR POS
....... AH = 0Ah
....... AL = character
....... BH = display page - alpha mode
....... BL = color of character (graphics mode)
....... CX = number of times to write character
............ (EGA) in graphics modes, replication count in CX works correctly
............ only if all character written are contains on the same row
-----------------------------------------------------------
INT 10 - VIDEO - SET COLOR PALETTE
....... AH = 0Bh
....... BH = 0
........... BL = border color (0-15) (text modes)
........... border color and background color (graphics modes)
........... (EGA)
........... BL = border color (0-15) and high-intensity background color
................. (16-31??? maybe should be high nybble?)
....... BH = 1
........... BL = palette (0/1)
-----------------------------------------------------------

Please contact me at the Email address shown at the bottom of this page if you wish to download this inforomation.


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Date last updated: October 2004