Tell me something (SDX+Atari Roots+Mac/65)

[Darkhog]

I've assembled first program from Atari Roots (one that adds two to two) and saved as object file. As Sparta Dos X user I couldn't get it to run. SDX doesn't have RUN command and else. What I need to do with my code to be able to run it from SDX?

[Roydea6]

http://sdx.atari8.info/sdx_files/4.45/sdx-445-manual.pdf

 

This should help..

[Xuel]

It's better to test the two plus two program within MAC/65. You don't need to save it to a file. The program doesn't output anything. It only changes a memory location. So you'll need a monitor like Mac/65's DDT to see the effect.

 

Here are the steps starting from scratch for those who want to follow along:

 

1. Download Mac/65.

 

2. Boot the cartridge in Altirra or your emulator of choice.

 

 

3. Type in the program from Atari Roots Chapter 4.

 

Change the starting location of the assembly since page 6 gets used by Mac/65:

 

40  *=$3800

 

Also, add the following line at the top to tell Mac/65 to actually assemble to memory.

 

10  .OPT OBJ

 

See also the Mac/65 Manual.

 

Make sure you use the correct number of spaces between the line numbers and the first token on each line.

 

 

You can cut-and-paste this in Altirra:

 

10  .OPT OBJ
40  *=$3800
60  CLD
70 ADDNRS CLC
80  LDA #2
90  ADC #2
100  STA $CB
110  RTS
120  .END

 

4. Assemble with "ASM"

 

 

5. Start debugger with "DDT"

 

6. Type "E 3800" to see your code

 

 

7. Type "E CB" to see initial value in address $CB

 

 

8. Type "G 3800" to run your code

 

9. Type "E CB" to see the value stored by your program

 

Edited April 26, 2013 by Xuel

[Darkhog]

http://sdx.atari8.in...-445-manual.pdf

 

This should help..

 

Which part of it? Because I've read through it like five time and only thing I could get with was this X command that didn't work anyway.

 

//edit: Xuel, thanks again. Will try it.

Edited April 26, 2013 by Darkhog

[Darkhog]

Also I'm working through Writing programs that will run when loaded and cannot find SDX equivalents to commands presented there. And when I just try to execute directly from SDX prompt or via X command, Atari crashes.

[drac030]

This means your program has a serious bug. Check and recheck the code, the following conditions first:

 

1) if the load address is correct, i.e. it does not overwrite DOS (DOS is above $0700 and below MEMLO value).

 

2) if the start address (RUNAD) is correct. When there is no RUNAD segment in your code, SDX executes the binary from the beginning.

 

To append RUNAD segment, add this:

 

  *= $02E0
  .word start

 

and mark the beginning of your program with the label 'start'.

[Darkhog]

Well, I'm going with code from Atari Roots (someone even posted it earlier, I think it was Xuel). Where do I add RUNAD segment? At beginning or end of code?

[drac030]

Simply add this at the end of your source. It can be anywhere in fact, but the end of the program listing is perhaps the most convenient point.

[Darkhog]

Hm... Still doesn't work, even with this.

 

When I ASM code, then BSAVE and run from SDX, it still crashes my (virtual) Atari.

[drac030]

Try assembling to a file, IIRC: ASM,,#D:FNAME.OBJ

[Darkhog]

Thanks, drac030! That totally works!

[Darkhog]

I'm currently going through "The Visitor" section of Atari Roots. I've already entered and saved "library" from beginning of the chapter, but have no idea how to link it with actual program. Any help?