+#define MTYPE_OS 0
+#define MTYPE_MD 1
+#define MTYPE_SSF 2
+#define MTYPE_CD 3
+#define MTYPE_SMS 4
+#define MTYPE_10M 5
+#define MTYPE_32X 6
+
+static int do_run(OsRoutine *ed, u8 b3)
+{
+ u8 mapper = 0;
+
+ switch (b3)
+ {
+ case 's':
+ mapper = MTYPE_SMS | (7 << 4);
+ break;
+ case 'm':
+ mapper = MTYPE_MD;
+ break;
+ case 'o':
+ mapper = MTYPE_OS;
+ break;
+ case 'c':
+ mapper = MTYPE_CD;
+ break;
+ case '3':
+ mapper = MTYPE_32X;
+ break;
+ case 'M':
+ mapper = MTYPE_10M;
+ break;
+ default:
+ return -1;
+ }
+
+ while (read32(GFX_CTRL_PORT) & 2)
+ ;
+ ed->VDP_setReg(VDP_MODE1, 0x04);
+ ed->VDP_setReg(VDP_MODE2, 0x44);
+
+ ed->usbWriteByte('k');
+
+ run_game(mapper);
+ /* should not get here.. */
+
+ return -1;
+}
+