pc-tools/boot-maker/main.c

   1 #include <stdio.h>
   2
   3
   4 void output(unsigned short * data){
   5     int c;
   6     char zero=0;
   7     unsigned char first_word=020;
   8     unsigned short akt=0;
   9         for (c=0; c<100; c++) write (1,&zero,1);
  10         write (1,&first_word,1); // Anfangsadresse ausgeben
  11         c=020;
  12         while (data[c]){
  13         unsigned char lower=data[c] & 0xff;
  14         unsigned char upper=(data[c] >> 8) & 0xff;
  15         write (1,&upper,1);
  16         write (2,"Locat geschrieben\n",18);
  17         write (1,&lower,1);
  18         c++;
  19         }
  20         for (c=0; c<100; c++) write (1,&zero,1); // Abspann
  21 }
  22
  23 void prepare_1(unsigned short * mem){
  24     mem[020]=0002010;    // Loop back to read boot-strap (must be here!)
  25     mem[021]=0004026;    // Load A with dancy pattern
  26     mem[022]=0024027;    // Increment and skip if zero 027
  27     mem[023]=0002022;    // Loop
  28     mem[024]=0040677;    // Right rotate a
  29     mem[025]=0002022;    // Loop back
  30     mem[026]=0052000;    // Bit pattern to move around
  31 }
  32
  33 int main(){
  34     unsigned short memory[0100];
  35     prepare_1(memory);
  36     output(memory);
  37     return 0;
  38 }