Compiling cc65 code for Atari?

[Harry Potter]

How do I compile a program for the Atari using cc65 and run it on an emulator?  I have DIR2ATR and Altirra.

[zbyti]

cl65 -t atari -Osir -Cl --listing foo.c.lst --add-source -o foo.c.xex foo.c

cl65 -t atari -Osir -Cl -o foo.xex foo.c

 

Edited January 30, 2021 by zbyti

[Harry Potter]

Thank you.  Now, how do I find out the used size of a memory area in cc65?

[Wrathchild]

Same as other targets, just include the outputting of the map file on the command line

[Harry Potter]

Thank you.

[Harry Potter]

Okay.  I built the file and ran it directly in the emulator.   It didn't work.  I used Dir2Atr to turn it into a disk image.  The emulator kept rebooting.  I added the DOS.SYS file, renamed the executable to AUTORUN.XEX and built the image as a DOS20 image.  I now get a program error.  Am I doing something wrong?

[Wrathchild]

Does the XEX run by itself fine in the emulator?

XEX is not an extension that is know by DOS, that would be SYS

[Harry Potter]

No, it doesn't.  I will try the renaming now.

[Wrathchild]

run Altirra with debugger mode enabled and then load (e.g. drag/drop) your binary

the console area should provide output on how it is being loaded

 

either feed that back here or post a small example project of what you are doing

 

[Harry Potter]

I am working on an Atari port of my CBMSimpleIO library, which is a cc65 library that shortens code overhead if you only need basic console I/O by calling the ROM routines directly.  Following is the main() function of the test code:

void main()
{
    //unsigned i;
    unsigned char c;
    char s[81];
    writetitle ("Happy-Face!");
    prints ("Testing, 1, 2, 3, testing!\n");
    printcr ();
    printu (0); printcr();
    printu (401); printcr();
    printi(1); printc(','); printi(-1); printcr();
    printscr("Press any key to continue...");
    printc(getkey());
    printscr ("\nNow type in a line:");
    c=getline(s);
    prints ("\nLen: "); printu (c);
    prints ("\nLine: "); printscr (s);
    getkey();
    taby=0; tabx=10; printrscr ("<--->");
    tabx=9; printrscr ("<--->");
    //goline (21); prints ("End!");
    taby=20; prints ("End!");
    //goline (0);
}

My printc code:

_printc=$f6a4

My getkey code:

_getkey=$f6e2

Both functions ae declared as __fastcall__, so that couldn't be the issue.

[Wrathchild]

Probably a rabbit hole you don't want to go down as different A8 OS ROMS will have different entry points for these and different devices (S:, E: K:) handle these for you.

You can use a trampoline vector and set the OS entry point by obtaining it from the device table, read here.

 

[Harry Potter]

Okay, it works now.  Just two problems: I still need to fix the keyboard handler, and the program beeps many times at start-up.

 

[Harry Potter]

How do I get a key and a line from the user?