matrix.a

汇编编程艺术

; MATRIX.A
;
; This include file provides the external definitions
; and data type definitions for the matrix sample program
; in Chapter Eight
;
; Some useful type definitions:

Integer		typedef	word
Char		typedef	byte


; Some common constants:

Bell		equ	07	;ASCII code for the bell character.


; A "Dope Vector" is a structure containing information about arrays that
; a program allocates dynamically during program execution.  This particular
; dope vector handles two dimensional arrays.  It uses the following fields:
;
;	TTL-	Points at a zero terminated string containing a description
;		of the data in the array.
;
;	Func-	Pointer to function to compute for this matrix.
;
;	Data-	Pointer to the base address of the array.
;
;	Dim1-   This is a word containing the number of rows in the array.
;
;	Dim2-	This is a word containing the number of elements per row
;		in the array.
;
;	ESize-	Contains the number of bytes per element in the array.

DopeVec		struct
TTL		dword	?
Func		dword	?
Data		dword	?
Dim1		word	?
Dim2		word	?
ESize		word	?
DopeVec		ends


; Some text equates the matrix code commonly uses:

Base		textequ	<es:[di]>

byp		textequ	<byte ptr>
wp		textequ	<word ptr>
dp		textequ	<dword ptr>


; Procedure declarations.

InpSeg		segment	para public 'input'

		externdef geti:far
		externdef getarray:far

InpSeg		ends


cseg		segment	para public 'code'

		externdef CrossProduct:near

cseg		ends


; Variable declarations

dseg		segment	para public 'data'

		externdef InputLine:byte

dseg		ends


; Uncomment the following equates if you want to turn on the
; debugging statements or if you want to include the MODULO function.


;debug		equ	0
;DoMOD		equ	0