OpenEuphoria

Re: ASM Tutorial

• Posted by Bernie Ryan <xotron at bluefrog.com> Nov 11, 2006
• 531 views

I think see why you are haveing difficulty see how to use ASM.EX
This is a really short tutorial.

First Download:
    http://www.rapideuphoria.com/asm2.zip

1: Look at fpixel.asm this is a text file of assembler neumonics.

2: Run asm.ex like this:

  ---------------------------------
  ASM to Euphoria compiler (32-bit)
  by Pete Eberlein    Nov 05, 2006
  ---------------------------------

  Enter the name of the asm file to compile: fpixel.asm
    1: commented source with line numbers (default),
    2: commented source,
    3: no source
  Select source option: 2

  fpixel.inc compiled with great success.

Warning: local constant SSE_MODRM_REG64 in asm.e is not used

3: Now you will have a file containing the machine code called
   fpixel.inc. This is not a complete program so you have to
   write some additional interface code to run it with Euphoria.

4: Compare this code in (fpixel.inc) with fpixel.ex and you will
   see that some extra code was needed to make a complete
   Euphoria.
   There are some locations that contain #00,#00,#00,#00, where
   there should be parameters loading into registers.
   For example the x value, the y value, and the color value.
   We have to poke these 4-bytes (dword) values into memory at correct
   offsets.
   Look at the comment in -- 1: mov ebx, dword x (2) in the
   fpixel.inc file; the dword x is at offset 2 that is what (2) in
   the comment means.
   Once all the parameters are setup (poked-in) then to execute
   the code you use call(fpixel) fpixel being the constant pointer
   that contains the allocated memory.
   The other code in the file is just ordinary Euphoria
   program code.

5: Now run the fpixel.ex file and see what happens.

Bernie

My files in archive:
WMOTOR, XMOTOR, W32ENGIN, MIXEDLIB, EU_ENGIN, WIN32ERU, WIN32API 

Can be downloaded here:
http://www.rapideuphoria.com/cgi-bin/asearch.exu?dos=on&win=on&lnx=on&gen=on&keywords=bernie+ryan