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 fancy 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 void prepare_2(unsigned short * mem){
  34     mem[020]=0002010;    // Loop back to read boot-strap (must be here!)
  35     mem[021]=0024027;    // Increment and skip if zero 027
  36     mem[022]=0002021;    // Loop
  37     mem[023]=0141206;    // Add one to A
  38     mem[024]=0002022;    // Loop back
  39     mem[025]=0000000;    // End
  40 }
  41
  42 void prepare_3(unsigned short * mem){
  43     mem[020]=0002010;    // Loop back to read boot-strap (must be here!)
  44     mem[021]=0004027;    // Load Precount
  45     mem[022]=0024027;    // Increment and skip if zero 027
  46     mem[023]=0002021;    // Loop
  47     mem[024]=0141206;    // Add one to A
  48     mem[025]=0141340;    // Change characters in A
  49     mem[026]=0002021;    // Loop back
  50     mem[027]=0077777;    // End
  51     mem[030]=0000000;
  52 }
  53
  54
  55 int main(){
  56     unsigned short memory[0100];
  57     prepare_3(memory);
  58     output(memory);
  59     return 0;
  60 }