cc65: printing in reverse?

[Harry Potter]

Hi!  I'm almost done with MadLibAtari.  The last thing I need is to print the story's title in reverse.  The program calls the revers() cc65 function to turn on reverse mode then aux_print() then revers() to turn off reverse mode, and aux_print() reads a byte from aux memory and prints it using putchar() until NULL is found.  However, the string prints in normal video.  How do I print in reverse video?

[danwinslow]

https://www.atariarchives.org/c3ba/appendixa.php

https://www.atariarchives.org/c2bag/page009.php

 

I found these in 15 seconds using the phrase "atari inverse characters print" in google.

 

[TGB1718]

Just do something like this

#include <stdio.h>
#include <string.h>
char st[]={"hello world"};
void main(void)
{
int i;
printf("%s\n",st);
for(i=0;i<strlen(st);i++)
        *(st+i)=*(st+i)+128;
printf("%s\n",st);
}
 

[Harry Potter]

Thank you. 

[Eric Rousseau]

Thanks Danwinslow for the infos.

 

I saved them and will look at it soon when I'll get back to my Atari project...