Simple CC65 NES ? - NESdev BBS

Simple CC65 NES ?
by rfisher1968 on 2017-02-22 (#189722)

Code:

#include <nes.h>
  
void main() 
{    
   waitvblank();
        
   *((unsigned char*)0x2006) = 0x3f;
   *((unsigned char*)0x2006) = 0x00;
        *((unsigned char*)0x2007) = 0x05; // put color 5 to address 0x3f00, which is the first in the above table
      
   *((unsigned char*)0x2006) = 0x3f;
        *((unsigned char*)0x2006) = 0x03;
   *((unsigned char*)0x2007) = 0x02; // put color 2 to address 0x3f0x, which is the third in the above table.
      
        *((unsigned char*)0x2006) = 0x20;
   *((unsigned char*)0x2006) = 0x41;
   *((unsigned char*)0x2007) = 'A'; // write letter.
      
   *((unsigned char*)0x2005) = 0x00;
   *((unsigned char*)0x2005) = 0x00;

   /* Enable the screen */
   /* By default, the screen and sprites were off */
   *((unsigned char*)0x2001) = 8;
    
   while(1);
}

Prints the letter 'A' on the screen.

Code:

#include <nes.h>
  
void main() 
{    
   waitvblank();
        
   *((unsigned char*)0x2006) = 0x3f;
   *((unsigned char*)0x2006) = 0x00;
    *((unsigned char*)0x2007) = 0x05; // put color 5 to address 0x3f00, which is the first in the above table
      
   *((unsigned char*)0x2006) = 0x3f;
    *((unsigned char*)0x2006) = 0x03;
   *((unsigned char*)0x2007) = 0x02; // put color 2 to address 0x3f0x, which is the third in the above table.
      
    *((unsigned char*)0x2006) = 0x20;
   *((unsigned char*)0x2006) = 0x41;
   *((unsigned char*)0x2007) = 'A'; // write letter.
      
   *((unsigned char*)0x2006) = 0x25;
   *((unsigned char*)0x2006) = 0x44;
   *((unsigned char*)0x2007) = 'B'; // write letter.   
      
   *((unsigned char*)0x2005) = 0x00;
   *((unsigned char*)0x2005) = 0x00;

   /* Enable the screen */
   /* By default, the screen and sprites were off */
   *((unsigned char*)0x2001) = 8;
    
   while(1);
}

This code only prints the letter 'B' instead of 'A' and 'B'.

Just looking for why does this happen and how can I display both.