pc-tools/boot-maker/main.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3
   4 void output(unsigned short * data){
   5     int c;
   6     char zero=0;
   7     unsigned char first_word=020;
   8         for (c=0; c<100; c++) write (1,&zero,1);
   9         write (1,&first_word,1); // Anfangsadresse ausgeben
  10         c=020;
  11         while (data[c]){
  12         unsigned char lower=data[c] & 0xff;
  13         unsigned char upper=(data[c] >> 8) & 0xff;
  14         write (1,&upper,1);
  15         write (2,"Locat geschrieben\n",18);
  16         write (1,&lower,1);
  17         c++;
  18         }
  19         for (c=0; c<100; c++) write (1,&zero,1); // Abspann
  20 }
  21
  22 void prepare_1(unsigned short * mem){
  23     mem[020]=0002010;    // Loop back to read boot-strap (must be here!)
  24     mem[021]=0004026;    // Load A with fancy pattern
  25     mem[022]=0024027;    // Increment and skip if zero 027
  26     mem[023]=0002022;    // Loop
  27     mem[024]=0040677;    // Right rotate a
  28     mem[025]=0002022;    // Loop back
  29     mem[026]=0052000;    // Bit pattern to move around
  30 }
  31
  32 void prepare_2(unsigned short * mem){
  33     mem[020]=0002010;    // Loop back to read boot-strap (must be here!)
  34     mem[021]=0024027;    // Increment and skip if zero 027
  35     mem[022]=0002021;    // Loop
  36     mem[023]=0141206;    // Add one to A
  37     mem[024]=0002022;    // Loop back
  38     mem[025]=0000000;    // End
  39 }
  40
  41 void prepare_3(unsigned short * mem){
  42     mem[020]=0002010;    // Loop back to read boot-strap (must be here!)
  43     mem[021]=0004027;    // Load Precount
  44     mem[022]=0024027;    // Increment and skip if zero 027
  45     mem[023]=0002021;    // Loop
  46     mem[024]=0141206;    // Add one to A
  47     mem[025]=0141340;    // Change characters in A
  48     mem[026]=0002021;    // Loop back
  49     mem[027]=0077777;    // End
  50     mem[030]=0000000;
  51 }
  52
  53
  54 int main(){
  55     unsigned short memory[0100];
  56     prepare_2(memory);
  57     output(memory);
  58     return 0;
  59 }