{{fbdoc item="title" value="vbdos.bi DOS interrupt compatibility header"}}----
Compatibility declarations for older Visual Basic for DOS and QB-style interrupt code.

{{fbdoc item="syntax"}}
%%(freebasic)
#include once "vbdos.bi"
%%

{{fbdoc item="desc"}}
	The header defines the 16-bit register records ##RegType## and ##RegTypeX## and maps ##INTERRUPT## and ##INTERRUPTX## onto the FreeBASIC DOS runtime.  ##RegTypeX## adds the ##ds## and ##es## segment registers to the common general-register and flags fields.

	This interface is only available when compiling for ##[[KeyPgDdfbdos|__FB_DOS__]]##.  Including it for another target is an error.  It is intended to make existing VBDOS and QB sources easier to port; new code should prefer a typed library or operating-system interface when one exists.  Callers remain responsible for using a valid interrupt number, initializing every input register consumed by the interrupt, and checking the returned flags and registers.

{{fbdoc item="ver"}}
	- Since fbc 1.20.1

{{fbdoc item="see"}}
	- ##[[FaqDOS|DOS FAQ]]##
	- ##[[ExtLibdos|DOS API]]##

{{fbdoc item="back" value="CatPgProgrammer|Programmer's Guide"}}