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- ;---------------------------------------------------------------------
- ; ASM88 FILE: SETCTRY.A Set Country Data
- ; ----------
- ; WRITTEN: 25/10/87
- ; -------
- ; PURPOSE: This is one of a series of files which take
- ; ------- advantage of INT 21H functions under MS-DOS.
- ; In each case the error situation is marked by
- ; the carry flag being set. We use the De Smet
- ; external variable '_carryf' to see whether the
- ; carry is set on return from the function.
- ; If so, the error code can be used to obtain
- ; information about the specific error.
- ;
- ; USAGE: int SETCTRY(country, &_carryf)
- ; ----- int country;
- ; char *_carryf;
- ;
- ; If country > 0ffh then this value must be placed
- ; in BX instead of AL and 0ffh must be placed in AL.
- ; The country code is usually the International
- ; Telephone prefix code.
- ;
- ; DEPENDENCIES: De Smet C V 2.44+
- ; ------------
- ; Copyright 1987 - Cogar Computer Services Pty. Ltd
- ;---------------------------------------------------------------------
-
- CSEG
- PUBLIC SETCTRY_
-
- SETCTRY_:
- push bp ; normal De Smet C start
- mov bp,sp ; point to the stack
- mov ax,ds ; and make ES common with DS
- mov es,ax
- ;----------------------------------------------------------------------
- ; The unique programme follows.
- ;----------------------------------------------------------------------
- mov bx,[bp+4] ; get country code
- mov dx,-1
- mov ah,38h ; the function No.
- mov al,0ffh ; ready for extended code
- cmp bx,0feh ; see if we should use AL for code
- ja SETCTRY_INT
- mov al,bl ; must be small code No.
- xor bx,bx ; zero out BX
- SETCTRY_INT:
- int 21h
- jc SETCTRY_ERROR ; do this if error
- jmp SETCTRY_QUIT ; else terminate normally
- SETCTRY_ERROR:
- mov si,[bp+6] ; get address of '_carryf' variable
- mov byte [si],1 ; return with _carryf = 1
- ;----------------------------------------------------------------------
- ; Normal programme termination.
- ;----------------------------------------------------------------------
- SETCTRY_QUIT:
- pop bp ; restore starting conditions
- ret
- ;----------------------------------------------------------------------