This section describes MS-DOS Interrupts 20h through 28h and Interrupt 2Fh in detail. The reference page for each interrupt provides the syntax, a statement of purpose, any parameter descriptions, and cross-references to similar or related interrupts and to related functions.
Interrupts 2Bh through 2Dh and 32h through 3Fh are not currently used by MS-DOS and are not documented here. Interrupts 29h, 2Ah, 2Eh, 30h, and 31h are also not documented.