Add emul_memdump() and stop automatically on ROM write

emul/emul.c

@@ -41,6 +41,9 @@ static void mem_write(int unused, uint16_t addr, uint8_t val)
 {
     if (addr < m.ramstart) {
         fprintf(stderr, "Writing to ROM (%d)!\n", addr);
+        emul_memdump();
+        fprintf(stderr, "Press any key to continue...\n");
+        while (getchar() > 0x100);
     }
     m.mem[addr] = val;
 }
@@ -102,6 +105,14 @@ void emul_trace(ushort addr)
     }
 }
 
+void emul_memdump()
+{
+    fprintf(stderr, "Dumping memory to memdump. PC %04x\n", m.cpu.PC);
+    FILE *fp = fopen("memdump", "w");
+    fwrite(m.mem, 0x10000, 1, fp);
+    fclose(fp);
+}
+
 void emul_printdebug()
 {
     fprintf(stderr, "Min SP: %04x\n", m.minsp);

emul/emul.h

@@ -31,4 +31,5 @@ bool emul_step();
 bool emul_steps(unsigned int steps);
 void emul_loop();
 void emul_trace(ushort addr);
+void emul_memdump();
 void emul_printdebug();

emul/hw/rc2014/classic.c

@@ -102,10 +102,7 @@ int main(int argc, char *argv[])
             char c;
             if (read(fileno(stdin), &c, 1) == 1) {
                 if (c == 5) {
-                    fprintf(stderr, "Dumping memory to memdump\n");
-                    FILE *fp = fopen("memdump", "w");
-                    fwrite(m->mem, 0x10000, 1, fp);
-                    fclose(fp);
+                    emul_memdump();
                     c = 0; // don't send to RC2014
                 }
                 if (c == 4) {   // CTRL+D