1 #include "6502.h" 2 #include "tui.h" 3 4 #include <stdio.h> 5 #include <stdlib.h> 6 #include <stdbool.h> 7 #include <signal.h> 8 9 #include <unistd.h> 10 11 #include <time.h> 12 #define nsleep(t) nanosleep((const struct timespec[]){{0, t * 1000L}}, NULL) 13 14 #define INPUT_FILE_PATH "6502_functional_test.bin" 15 16 /* TODO: Add support for command line arguments */ 17 /* TODO: Add proper system monitor (memory dump, cpu registers) */ 18 19 static bool brk = false; 20 21 void CPU_brk(uint16_t pc) { 22 if (CPU_get_pc () == pc) { 23 printf("BRK: %2X reached\n", pc); 24 brk = true; 25 } 26 } 27 28 void sig_handler(int signo) { 29 if (signo == SIGINT) brk = true; 30 if (signo == SIGQUIT) brk = true; 31 } 32 33 int main(void) { 34 INS ins; 35 36 /* Initialize memory to 0 */ 37 MEM_init(); 38 39 /* Load program to memory */ 40 if(MEM_load_from_file(INPUT_FILE_PATH)) 41 return 1; 42 43 /* set the first address that the pc should be set to */ 44 MEM_set_pc_start(0x0400); 45 46 /* Initialize cpu registers to 0 */ 47 CPU_init(); 48 49 /* initialize registers from memmory */ 50 CPU_reset(); 51 52 set_input_mode(); 53 signal(SIGINT, sig_handler); 54 signal(SIGQUIT, sig_handler); 55 atexit(reset_input_mode); 56 57 do { 58 /* set break point at pc 0x336d */ 59 CPU_brk(0x336d); 60 61 CPU_fetch(&ins); 62 CPU_dump(); 63 64 if(CPU_exec(ins) != 0) { 65 /* exit if invalid instruction */ 66 char c; 67 read(STDIN_FILENO, &c, 1); 68 brk = true; 69 } 70 71 nsleep(1000); 72 } while(!brk); 73 74 reset_input_mode(); 75 return 0; 76 }
