dos33fsprogs/demos/xmas_2018/make_table.c

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#include <stdio.h>
int main(int argc, char **argv) {
int i;
int top;
int bottom;
int out;
for(i=0;i<256;i++) {
top=i&0x7c;
bottom=i&3;
out=(top>>2)|(bottom<<5);
if (i%8==0) printf("\n.byte\t");
printf("$%02X",out);
if (i%8!=7) printf(",");
}
printf("\n");
return 0;
}