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flat assembler > Macroinstructions > NASM Conversion to FASM Help for a Newbie

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robink



Joined: 17 Sep 2003
Posts: 14
I know that this has probably been answered before but I am a halt here. Please look at this code and tell me how I can do this - Thank-you.

This is in a file called mylib.mac:

macro Write SIT,SL ;ShowIt,ShowLength
{ mov BX,1 ; Selects DOS file handle 1: Standard Output
mov CX,SL ; ShowLength: Length of string passed in CX
mov DX,SIT ; Showit: Offset address of string passed in DX
mov AH,40H ; Select DOS service 40: Print String
int 21H ; Call DOS
}

Code snippet from main program:

include "MYLIB.MAC"
...

Write Eat1,Eat1Length ; and display first text line

GotoXY 14H,0AH ; Position cursor
Writeln Eat2,Eat2Length ; and display second text line

mov AH,4CH ; Terminate process DOS service
mov AL,0 ; Pass this value back to ERRORLEVEL
int 21H ; Control returns to DOS



LRXY DW 184FH ; 18H = 24D; 4FH = 79D; 0-based XY of LR screen corner

VidOrigin DD 0B8000000H ; Change to 0B0000000H if you have a mono CRT!
Eat1 DB "Eat at Joe's..."
Eat1Length EQU $-Eat1
Eat2 DB "...ten million flies can't ALL be wrong!"
Eat2Length EQU $-Eat2
CRLF DB 0DH,0AH

When I compile the program I get the following error message:

Error: undefined symbol

mov CX,Eat1Length

I am sure a lot of you will recognize this code as coming from Jeff Duntemann's new book. I am trying to learn Assembler and FASM by trying to convert some of the NASM example programs. Any help here would be really appreciated. Thanks,

Robin

_________________
Thanks,

Robin
Post 22 Sep 2003, 18:53
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Tomasz Grysztar
Assembly Artist


Joined: 16 Jun 2003
Posts: 7322
Location: Kraków, Poland
Use = instead of EQU to define numerical constants.
Post 22 Sep 2003, 19:06
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robink



Joined: 17 Sep 2003
Posts: 14
Thank-you so much for your help. I cannot believe it was that simple. Just a praise for FASM - I have really been enjoying using FASM for my learning of Assembler. Keep up the great work.

_________________
Thanks,

Robin
Post 22 Sep 2003, 19:18
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