Something is almost working

cpu/core.h

@@ -10,7 +10,7 @@
 
 #define MEM_SIZE 65535
 // Register count (register names R0 to R7)
-#define REG_COUNT 32
+#define REG_COUNT 64
 #define STACK_SIZE 255
 
 #define CPU_FLAG_ZERO (1 << 0)
@@ -33,6 +33,7 @@ typedef struct {
     uint32_t stack_ptr; // Stack pointer
     uint8_t flags; // Status flags
     uint8_t mode;
+    uint32_t cycle;
 } CPU;
 
 void step(CPU *cpu);
@@ -49,6 +50,8 @@ typedef enum {
 
     BRK,        // BRK - Pause CPU (halts execution until resumed)
 
+    HLT,
+
     MOV_RN_IMM,   // MOV Rn, Imm - Move immediate to register (Rn = Imm)
     MOV_RN_RM,    // MOV Rn, Rm - Move value from one register to another (Rn = Rm)
     MOV_RN_ADDR,  // MOV Rn, [Addr] - Load value from memory address into register (Rn = [Addr])