Accessing the drive?

[Wrathchild]

Looks like the Basic ROM is enabled and as the stack area is in that zone that's not gonna help

 

 

So that seems the fault of the aux_setbank function which is OR'ing with $91 when it could be $93, i.e. check the details at https://atariwiki.org/wiki/Wiki.jsp?page=PORTB

 

[Harry Potter]

Thank you. 

[VinsCool]

This thread reminds me when I was trying to use $C000 as memory location and was legitimately confused it would not work.

 

I'm still new to 6502 ASM programming, but I think about this moment again today and remember I'm dumb lol

[Harry Potter]

I fixed the issue.  Same problem.   

[TGB1718]

Just a small point @Harry Potter , I notice in your code there are still things like

 

char string[100]={"ABCDEF"};

 

then later you pass the string in a function like

 

result = myfunc(&string,a,b);

 

there is no need to use the "&", when you define a variable as char string[100] string is a pointer.

In your code although it will probably still work, you may be wasting cycles while the code gets the

address of 'string'.

 

I only say this as you said you want optimizations and this is one such way

 

[Harry Potter]

Thank you.

[Harry Potter]

How do I disable the BASIC ROM?  I am using the Altirra64 emulator.

[Wrathchild]

It wouldn't matter is a basic is attached in the emulator, the PortB register controls it in the XL model. Rtfm

 

[Harry Potter]

I got it to work!    It only works in 1200XL mode.

[Harry Potter]

Now, there is something wrong with the loadauxfile() function: it loads only one byte before exiting.  The aux memory contains more than one byte.  I attached the file containing the function.  Also, the extra Low me mory still crashes the system.  I attached the config and crt0.s files.

readauxfile.c atarixl_memx.cfg crt0.s

[Harry Potter]

I got the low memory to work now.    But the aux file is not. 

[Wrathchild]

You'd be better off maintaining this on github so the changes could be better tracked/understood

[Harry Potter]

I found out the problem with aux memory: the file that is loaded into aux memory is empty.    I attached the file containing the strings.

teststrings.c

[Wrathchild]

?

8 minutes ago, Harry Potter said:

the file that is loaded into aux memory is empty.

No file is loaded into aux memory - by putting strings in that C file the resulting executable simply has a section that loads data there. So its like saying the a file is loaded into MAIN memory.

 

[Harry Potter]

I got it to work: I used #pragma data-name instead of #pragma rodata-name, and now that works.  But now, the XBUF memory area doesn't work.  I really want to use this buffer for code and data.  Maybe I'm doing it wrong.  I pasted the header code here.

.segment    "XBUFH"
.word        __XBUF__START__
.word        __XBUF__START__+__XBUF__SIZE__

[sanny]

you always with just sending snippets, sigh

 

try

 

.word        __XBUF__START__+__XBUF__SIZE__-1

 

[Harry Potter]

I tried that.  The screen turns black for a second then alternates between garbage and ERROR 138.