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37 lines
707 B
C
37 lines
707 B
C
#include <stdio.h>
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int main(int argc, char **argv) {
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int byte,offset=0;
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unsigned int total=0;
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unsigned short checksum;
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int debug=0;
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while(1) {
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byte=fgetc(stdin);
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if (byte<0) break;
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if (debug) {
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if (offset==0xffdc) printf("%x\n",byte);
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if (offset==0xffdd) printf("%x\n",byte);
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if (offset==0xffde) printf("%x\n",byte);
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if (offset==0xffdf) printf("%x\n",byte);
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}
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total+=byte;
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offset++;
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}
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checksum=total&0xffff;
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printf("\t.word\t$%hx\t\t; Complement of checksum\n",~checksum);
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printf("\t.word\t$%hx\t\t; Unsigned 16-bit sum of ROM\n",checksum);
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return 0;
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}
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