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Thread: Challenge 18F indirect addressing
face BY : Scott Dattalo email (remove spam text)

The 18f452 has some really tricky ways to implement indirect addressing.

#define  MAX_LEN 256

unsigned char arr[MAX_LEN];
unsigned int  sum;

void array_sum(unsigned char len)
 unsigned char i;

  sum = 0;
  for(i=0; i<len; i++)
    sum += arr[i];


This can obviously be implemented in less than 12 instructions. How about


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See also: www.piclist.com/techref/microchip/devices.htm?key=18F
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Subject (change) Challenge 18F indirect addressing

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