16-bit Assembler multi-file Intel Assembler compiler masm5.0 calling a subroutine library that is a static library of custom functions WINDOWS

The following is a 16-bit assembly to create a static library and invoke a function in the static library

; multi-file assembly format

; The compilation method (used here is MASM 5.0, if it is another compiler, it may not compile)

; First, the method of compiling

; 1, MASM main.asm generate the. obj file

; 2, MASM lib.asm generate the. obj file

; 3, link main.obj lib.obj generate. exe file

; second, the method of compiling

; 1, MASM main.asm generate the. obj file

; 2, MASM 16lib.asm generate the. obj file

3. lib 16lib.lib 16lib.obj. lib files generated by. obj files, which are static library files that can be used as function libraries

; 4, link main.obj 16lib.lib. exe file generated by. obj. lib Two files

;=======================================

;(main.asm)

. Model Small

. Stack 100h

.386

. Data

MSG db "In my world! You know? ", 0

. Code

Extrn Int21h_40h:far; Refer to external functions, note: masm5.0 uses EXTRN, less an e character

Main PROC

mov ax, @data

MOV Ds,ax

Push di

MOV Di,offset MSG

Call int21h_40h

Pop di

MOV ax,4c00h

int 21h Main

Endp

END Main

;==================================

;(16lib.asm)

. Model Small

. stack. Data

. Code

public int21h_40h; Define external functions

; ********ms-dos Interrupt int 21h function call ***********************

;--------int 21h function number 40h case-------------

; Description: Display a string on standard output

; input parameters: di = string Address

; output parameter: None

int21h_40h proc Far

XOR cx,cx

MOV dx,di; Save the parameters before the loop, because the back loop will change the DI

Here is also the parameter of function 40h

L1:

; Calculate string length

CMP byte ptr[di],0

Je L2

Inc CX

Inc di

JMP L1

L2:

; Display string to standard output device

MOV ah,40h

MOV bx,1

int 21h

Ret

int21h_40h ENDP

End

16-bit Assembler multi-file Intel Assembler compiler masm5.0 calling a subroutine library that is a static library of custom functions WINDOWS