Specifications

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INT 0x10 - Video
This INT is supported by the video OpROM. There is no native planar BIOS support.
INT 0x11 - Equipment Determination
This INT must be supported. This INT returns the data at memory location 40:10.
Memory Location 40:10
This location is a Word memory location and contains the equipment list.
INT 0x12 - Base Memory Size
This INT must be supported and returns the value at memory location 40:13.
Memory Location 40:13
This location is a Word memory location and contains the amount of memory up to 640
KB. It is set to 0x280 regardless of the Extended BIOS Data Area (EBDA) size because
the 512 KB option has been obsoleted.
INT 0x13 - HDD and Floppy Diskette Services
This INT must be supported, including the Microsoft* extensions. IDE, floppy diskette,
ATAPI, ATA, El Torito, and ARMD drives must be supported. Note that if non-floppy
controllers are present, INT 0x40 must be supported.
INT 0x14 - Serial Communication Services
This INT must be supported.
INT 0x15 - System Services
This INT must be supported. Subfunctions are those defined by the IBM* Personal
System/2 and Personal Computer BIOS Interface Technical Reference manual. Additional
subfunction support is OEM and/or IBV dependent.
INT 0x16 - Keyboard Services
This INT must be supported.
INT 0x17 - Printer Services
This INT must be supported.
INT 0x1A - System-Timer Services
This INT must be supported, including the PCI BIOS extensions.
INT 0x1B - CTRL- BREAK Services
The BIOS sets this to IRET and the OS hooks it.
INT 0x1C - Periodic Timer Interrupt
The BIOS sets this to IRET and the OS hooks it.