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Figuring out how to copy rom into memory

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This commit is contained in:
Marcelina Szostak 2025-04-18 18:30:43 +02:00
parent e06e7d7afb
commit 938b1a6133
Signed by: kapcioszek
GPG Key ID: 5B07EB46181A963B
4 changed files with 60 additions and 6 deletions
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1
.gitignore vendored
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@ -1 +1,2 @@
a.out a.out
out.bin

1
ROM.bin Normal file
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@ -0,0 +1 @@
trupi

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example.bin Normal file
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@ -0,0 +1 @@
zupa

63
main.c
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@ -2,9 +2,26 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
long GetFileSize(FILE* f){
fseek(f, 0, SEEK_END);
long size = ftell(f);
fseek(f, 0, SEEK_SET);
return size;
}
void DumpMemory(char *memory, FILE *filename){
FILE *dump = fopen(filename, "wb");
fwrite(memory, 1, mem_size, dump);
fclose(dump);
}
int main(int argc, char **argv){ int main(int argc, char **argv){
long mem_size = 0; long mem_size = 0;
char filename[255];
FILE *rom = fopen("ROM.bin","rb");
mem_size = mem_size + GetFileSize(rom);
//Handling arguments //Handling arguments
if(argc < 2){ if(argc < 2){
@ -15,23 +32,57 @@ int main(int argc, char **argv){
if(strcmp(argv[i], "-m") == 0 || strcmp(argv[i], "--memory") == 0){ if(strcmp(argv[i], "-m") == 0 || strcmp(argv[i], "--memory") == 0){
char *endptr; char *endptr;
long convert = strtol(argv[i+1], &endptr, 10); long convert = strtol(argv[i+1], &endptr, 10);
mem_size = &endptr != NULL ? convert : mem_size; mem_size = &endptr != NULL ? mem_size + convert : mem_size;
} }
if(strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0){ if(strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0){
printf("Usage: %s [OPTIONS] file\nOptions:\n%s-m, --memory: specify RAM size\n%s-h, --help: print this message\n\n",argv[0]," "," "); printf("Usage: %s [OPTIONS] --file filename\nOptions:\n%s-m, --memory: specify RAM size\n%s-h, --help: print this message\n\n",argv[0]," "," ");
return 0; return 0;
} }
if(strcmp(argv[i], "-f") == 0 || strcmp(argv[i], "--file") == 0){
for(int j = 0; j < strlen(argv[i+1]); j++){
filename[j] = argv[i+1][j];
} }
}
}
FILE *program = fopen(filename, "rb");
if(program == NULL){
printf("ERROR: file does not exist");
return 2;
}
long program_size = GetFileSize(program);
mem_size = mem_size + program_size;
//Intializing memory and stuff //Intializing memory and stuff
long PC = 0; //program counter long PC = 0; //program counter
char *mem_pointer = malloc(mem_size * sizeof(char)); //allocate RAM char *memory = (char *)malloc(mem_size * sizeof(char)); //Allocating RAM
if(mem_pointer == NULL){ if(memory == NULL){
printf("ERROR: Memory allocation failed (Buy more RAM)"); printf("ERROR: Memory allocation failed (Buy more RAM)");
return 2; return 3;
} }
//Copying program to memory
{
char buffer[program_size];
fread(buffer, 1, program_size, program);
for(int i = 0; i <= program_size; i++){
memory[mem_size-i] = buffer[program_size-i];
}
}
fclose(program);
//Copying ROM to memory
{
long size = GetFileSize(rom);
char buffer[size];
fread(buffer, 1, size, rom);
for(int i = 0; i < size; i++){
memory[mem_size-program_size-1-i] = buffer[size-i];
}
}
fclose(rom);
free(mem_pointer); DumpMemory(memory, "out.bin");
free(memory);
return 0; return 0;
} }