[Coco] LWASM "Hello World" for OS 9.

[L. Curtis Boyle]

I can’t speak for LWASM and what change would be needed using it specifically, but here is on for the level 1/2 assembler ASM:

         nam   Hello
         ttl   program module

* Use NitrOS9/EOU definition files
         ifp1
           use /dd/defs/deffile
         endc

* From here to MOD pseudo op is for setting up the OS9 module header
*   information. For a normal assembly language user program, the only
*   thing you might change is the rev (revision; part of 'At/Rv' seen in
*   IDENT information).

tylg     set   Prgrm+Objct
atrv     set   ReEnt+rev
rev      set   $01
         mod   eom,name,tylg,atrv,start,size

u0000    rmb   1            scratch var (unused in this example)
size     equ   .

name     fcs   /Hello/
         fcb   $01          Edition # (I usually this for internal version #)

* Text message to print
Message  fcc   'Hello World'
         fcb   C$CR
MsgSize  equ   *-Message    Message size

start    lda   #1           Standad output path (normally the screen)
         leax  Message,pcr  Point to message to print for I$WritLn
         ldy   #MsgSize     Size of message to print for I$WritLn
         os9   I$WritLn     Print it
         clrb               No error to report
         os9   F$Exit       Exit our tests program with no error

         emod
eom      equ   *
         end


> On Sep 21, 2023, at 5:34 AM, coco--- via Coco <coco at maltedmedia.com> wrote:
> 
> All
> 
> I found a LWASM "Hello World" example for 6809 assembly language in RS-DOS at
> https://nowhereman999.wordpress.com/2017/06/19/coco-6809-assembly-on-a-modern-computer/
> He focuses on MAME and using the MAME debugger which I am not interested in at this
> point as I use Vcc and have had little success with MAME.
> 
> Could anyone give me an assembly language source example "Hello World" for OS 9
> using LWASM ?
> 
> Charlie
> 
> -- 
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>