diff --git a/misc/autocons.c b/misc/autocons.c
new file mode 100644
index 00000000..1280d4d9
--- /dev/null
+++ b/misc/autocons.c
@@ -0,0 +1,76 @@
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define COM1 0x3f8
+#define COM2 0x2f8
+#define COM3 0x3e8
+#define COM4 0x2e8
+
+#define SPEEDNOOP 0
+#define SPEED9600 3
+#define SPEED19200 4
+#define SPEED57600 6
+#define SPEED115200 7
+
+int main(int argc, char* argv[]) {
+    struct termios tty;
+    int ttyf;
+    int spcr;
+    int currspeed;
+    speed_t cspeed;
+    char buff[128];
+    uint64_t address;
+    spcr = open("/sys/firmware/acpi/tables/SPCR", O_RDONLY);
+    if (spcr < 0) {
+        exit(0);
+    }
+    if (read(spcr, buff, 80) < 80) {
+        exit(0);
+    }
+    if (buff[8] != 2) exit(0); //revision 2
+    if (buff[36] != 0) exit(0); //16550 only
+    if (buff[40] != 1) exit(0); //IO only
+    address = *(uint64_t *)(buff + 44);
+    currspeed = buff[58];
+    if (address == COM1) {
+        strncpy(buff, "/dev/ttyS0", 128);
+    } else if (address == COM2) {
+        strncpy(buff, "/dev/ttyS1", 128);
+    } else if (address == COM3) {
+        strncpy(buff, "/dev/ttyS2", 128);
+    } else if (address == COM4) {
+        strncpy(buff, "/dev/ttyS3", 128);
+    } else {
+        exit(0);
+    }
+    if (currspeed == SPEED9600) {
+        cspeed = B9600;
+    } else if (currspeed == SPEED19200) {
+        cspeed = B19200;
+    } else if (currspeed == SPEED57600) {
+        cspeed = B57600;
+    } else if (currspeed == SPEED115200) {
+        cspeed = B115200;
+    } else if (currspeed == SPEED115200) {
+        cspeed = 0;
+    } else {
+        exit(0);
+    }
+    printf("%s\n", buff);
+    ttyf = open(buff, O_RDWR | O_NOCTTY);
+    tcgetattr(ttyf, &tty);
+    if (cspeed) {
+        cfsetospeed(&tty, B115200);
+        cfsetispeed(&tty, B115200);
+    }
+    tcsetattr(ttyf, TCSANOW, &tty);
+    ioctl(ttyf, TIOCCONS, 0);
+
+}
+