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112 lines
3.2 KiB
Markdown
112 lines
3.2 KiB
Markdown
The **QB.BI** file can be used for [INTERRUPT](INTERRUPT) or [INTERRUPTX](INTERRUPTX) routines by [$INCLUDE]($INCLUDE)ing the file in a program. It is useful for the [TYPE](TYPE) and [SUB](SUB) declarations.
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## Description
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* Create your own BI files to [$INCLUDE]($INCLUDE) to hold your own [TYPE](TYPE) definitions. Use notepad and save as All Files as *filename.BI*
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* In QBasic the BI library or support file MUST be included in a program package or download!
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* **QB64** programs do not require any INCLUDED files once the BAS file is compiled!
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## Example(s)
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> *The QB.BI file contents:*
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```vb
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'**************************************************************************
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' QB.BI - Assembly Support Include File
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'
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' Copyright <C> 1987 Microsoft Corporation
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'
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' Purpose:
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' This include file defines the types and gives the DECLARE
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' statements for the assembly language routines CALL ABSOLUTE,
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' INTERRUPT, INTERRUPTX, INT86OLD, and INT86XOLD.
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'
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'***************************************************************************
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'
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' Define the [TYPE](TYPE) needed for [INTERRUPT](INTERRUPT)
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'
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TYPE RegType
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ax AS INTEGER
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bx AS INTEGER
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cx AS INTEGER
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dx AS INTEGER
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bp AS INTEGER
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si AS INTEGER
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di AS INTEGER
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flags AS INTEGER
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END TYPE
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'
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' Define the [TYPE](TYPE) needed for [INTERRUPTX](INTERRUPTX)
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'
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TYPE RegTypeX
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ax AS INTEGER
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bx AS INTEGER
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cx AS INTEGER
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dx AS INTEGER
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bp AS INTEGER
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si AS INTEGER
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di AS INTEGER
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flags AS INTEGER
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ds AS INTEGER
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es AS INTEGER
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END TYPE
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'
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' DECLARE statements for the 5 supported routines
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' -----------------------------------------
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'
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' Generate a software interrupt, loading all but the segment registers
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'
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DECLARE SUB INTERRUPT (intnum AS INTEGER, inreg AS RegType, outreg AS RegType)
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'
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' Generate a software interrupt, loading all registers
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'
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DECLARE SUB INTERRUPTX (intnum AS INTEGER, inreg AS RegTypeX, outreg AS RegTypeX)
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'
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' Call a routine at an absolute address.
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' NOTE: If the routine called takes parameters, then they will have to
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' be added to this declare statement before the parameter given.
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'
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DECLARE SUB ABSOLUTE (address AS INTEGER)
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'
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' Generate a software interrupt, loading all but the segment registers
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' (old version)
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'
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DECLARE SUB INT86OLD (intnum AS INTEGER, inarray(1) AS INTEGER, outarray(1) AS INTEGER)
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'
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' Gemerate a software interrupt, loading all the registers
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' (old version)
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'
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DECLARE SUB INT86XOLD (intnum AS INTEGER, inarray(1) AS INTEGER, outarray(1) AS INTEGER)
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```
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> *Ethan Winer's compact "RegType.BI" file for [INTERRUPT](INTERRUPT) or [INTERRUPTX](INTERRUPTX):*
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```vb
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TYPE RegType
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ax AS INTEGER
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bx AS INTEGER
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cx AS INTEGER
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dx AS INTEGER
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bp AS INTEGER
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si AS INTEGER
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di AS INTEGER
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flags AS INTEGER
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ds AS INTEGER
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es AS INTEGER
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END TYPE
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```
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> *Explanation:* DECLARE statements in QB4.5 and PDS(7.1) are not required because the Library MUST be included with [INTERRUPT](INTERRUPT), [INTERRUPTX](INTERRUPTX) and [CALL ABSOLUTE](CALL-ABSOLUTE) or a "Subprogram not defined" [ERROR Codes](ERROR-Codes) will occur.
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## See Also
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* [$INCLUDE]($INCLUDE), [INTERRUPT](INTERRUPT), [INTERRUPTX](INTERRUPTX)
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