diff --git a/Makefile b/Makefile
index fb02001..a6a2bf5 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ all: create_build_dir $(VERSION_HEADER) $(SUBDIRS) $(BUILDDIR)rtlplayground.bin
 create_build_dir:
 	mkdir -p $(BUILDDIR)
 
-SRCS = rtlplayground.c rtl837x_flash.c rtl837x_phy.c rtl837x_port.c cmd_parser.c html_data.c rtl837x_igmp.c rtl837x_stp.c rtl837x_pins.c dhcp.c machine.c
+SRCS = rtlplayground.c rtl837x_flash.c rtl837x_leds.c rtl837x_phy.c rtl837x_port.c cmd_parser.c html_data.c rtl837x_igmp.c rtl837x_stp.c rtl837x_pins.c dhcp.c machine.c
 OBJS = ${SRCS:%.c=$(BUILDDIR)%.rel}
 OBJS += uip/$(BUILDDIR)/timer.rel uip/$(BUILDDIR)/uip-fw.rel uip/$(BUILDDIR)/uip-neighbor.rel uip/$(BUILDDIR)/uip-split.rel uip/$(BUILDDIR)/uip.rel uip/$(BUILDDIR)/uip_arp.rel uip/$(BUILDDIR)/uiplib.rel httpd/$(BUILDDIR)/httpd.rel httpd/$(BUILDDIR)/page_impl.rel
 
diff --git a/rtl837x_leds.c b/rtl837x_leds.c
new file mode 100644
index 0000000..4bf38e0
--- /dev/null
+++ b/rtl837x_leds.c
@@ -0,0 +1,130 @@
+/*
+ * This is a driver implementation for the IGMP features for the RTL827x platform
+ * This code is in the Public Domain
+ */
+
+// #define REGDBG
+// #define DEBUG
+
+#define IPMC_USES_L3MC
+
+#include <stdint.h>
+#include "rtl837x_common.h"
+#include "rtl837x_sfr.h"
+#include "rtl837x_regs.h"
+#include "rtl837x_leds.h"
+#include "machine.h"
+
+extern __code struct machine machine;
+
+#include "uip.h"
+
+#pragma codeseg BANK2
+#pragma constseg BANK2
+
+extern __xdata uint8_t sfr_data[4];
+
+void leds_dump(void) __banked
+{
+	print_string("RTL837X_REG_LED_GLB_IO_EN: "); print_reg(RTL837X_REG_LED_GLB_IO_EN); write_char('\n');
+	print_string("RTL837X_REG_LED1_0_SET0: "); print_reg(RTL837X_REG_LED1_0_SET0); write_char('\n');
+	print_string("RTL837X_REG_LED3_2_SET0: "); print_reg(RTL837X_REG_LED3_2_SET0); write_char('\n');
+	print_string("RTL837X_REG_LED1_0_SET1: "); print_reg(RTL837X_REG_LED1_0_SET1); write_char('\n');
+	print_string("RTL837X_REG_LED3_2_SET1: "); print_reg(RTL837X_REG_LED3_2_SET1); write_char('\n');
+	print_string("RTL837X_REG_LED1_0_SET2: "); print_reg(RTL837X_REG_LED1_0_SET2); write_char('\n');
+	print_string("RTL837X_REG_LED3_2_SET2: "); print_reg(RTL837X_REG_LED3_2_SET2); write_char('\n');
+	print_string("RTL837X_REG_LED1_0_SET3: "); print_reg(RTL837X_REG_LED1_0_SET3); write_char('\n');
+	print_string("RTL837X_REG_LED3_0_SET1: "); print_reg(RTL837X_REG_LED3_0_SET1); write_char('\n');
+	print_string("RTL837X_REG_LED3_0_SET3: "); print_reg(RTL837X_REG_LED3_0_SET3); write_char('\n');
+	print_string("RTL837X_LED_PORT_SET_SEL: "); print_reg(RTL837X_LED_PORT_SET_SEL); write_char('\n');
+	print_string("LED Configuration:\n");
+	print_string("LED-ID\t\t0\t\t1\t\t2\t\t3\n");
+	for (uint8_t set = 0; set < 4; set++) {
+		print_string("SET "); write_char('0' + set); write_char(':');
+		for (uint8_t ledid = 0; ledid < 4; ledid++) {
+			print_string("\t   ");
+			uint8_t b;
+			if (set < 2) {
+				reg_read_m(RTL837X_REG_LED3_0_SET1);
+				b = sfr_data[3-((set << 1) + (ledid >> 1))];
+				print_byte(ledid & 1 ? b >> 4 : b & 0xf);
+			} else {
+				reg_read_m(RTL837X_REG_LED3_0_SET3);
+				b = sfr_data[3-(((set-2) << 1) + (ledid >> 1))];
+				print_byte(ledid & 1 ? b >> 4 : b & 0xf);
+			}
+			reg_read_m(RTL837X_REG_LED1_0_SET0 - set * 8 - ((ledid >> 1) * 4));
+			if (! (ledid & 1)) { // LEDID 0, 2
+				print_byte(sfr_data[2]); print_byte(sfr_data[3]);
+			} else {
+				print_byte(sfr_data[0]); print_byte(sfr_data[1]);
+			}
+		}
+		write_char('\n');
+	}
+	for (uint8_t i = machine.min_port; i <= machine.max_port; i++) {
+		reg_read_m(RTL837X_LED_PORT_SET_SEL);
+		uint8_t set = sfr_data[3 - (i >> 2)];
+		set = (set >> ((i & 3) << 1));
+		print_string("Port "); write_char('0' + i); print_string(": SET ");
+		write_char('0' + set);
+		print_string(": ");
+		for (uint8_t ledid = 0; ledid < 4; ledid++) {
+			write_char('(');
+			reg_read_m(RTL837X_REG_LED1_0_SET0 - set * 8 - ((ledid >> 1) * 4));
+			if (ledid & 1) {  // LEDID 1, 3
+				sfr_data[2] = sfr_data[0];
+				sfr_data[3] = sfr_data[1];
+			}
+			if (sfr_data[3] & 0x01)
+				print_string(" 2G5");
+			if (sfr_data[3] & 0x02)
+				print_string(" TWO_1G");
+			if (sfr_data[3] & 0x04)
+				print_string(" 1G");
+			if (sfr_data[3] & 0x08)
+				print_string(" 500M");
+			if (sfr_data[3] & 0x10)
+				print_string(" 100M");
+			if (sfr_data[3] & 0x20)
+				print_string(" 10M");
+			if (sfr_data[3] & 0x40)
+				print_string(" LINK");
+			if (sfr_data[3] & 0x80)
+				print_string(" LINK_FLASH");
+			if (sfr_data[2] & 0x01)
+				print_string(" ACT");
+			if (sfr_data[2] & 0x02)
+				print_string(" RX");
+			if (sfr_data[2] & 0x04)
+				print_string(" TX");
+			if (sfr_data[2] & 0x00)
+				print_string(" COL");
+			if (sfr_data[2] & 0x10)
+				print_string(" DUPLEX");
+			if (sfr_data[2] & 0x20)
+				print_string(" TRAINING");
+			if (sfr_data[2] & 0x40)
+				print_string(" MASTER");
+			uint8_t b;
+			if (set < 2) {
+				reg_read_m(RTL837X_REG_LED3_0_SET1);
+				b = sfr_data[3-((set << 1) + (ledid >> 1))];
+			} else {
+				reg_read_m(RTL837X_REG_LED3_0_SET3);
+				b = sfr_data[3-(((set-2) << 1) + (ledid >> 1))];
+			}
+			b = ledid & 1 ? b >> 4 : b & 0xf;
+			if (b & 0x1)
+				print_string(" 10G");
+			if (b & 0x2)
+				print_string(" TWO_5G");
+			if (b & 0x4)
+				print_string(" 5G");
+			if (b & 0x8)
+				print_string(" TWO_2G5");
+			print_string("), ");
+		}
+		write_char('\n');
+	}
+}
diff --git a/rtl837x_leds.h b/rtl837x_leds.h
new file mode 100644
index 0000000..e616c31
--- /dev/null
+++ b/rtl837x_leds.h
@@ -0,0 +1,7 @@
+#ifndef _RTL837X_LEDS_H_
+#define _RTL837X_LEDS_H_
+
+#include <stdint.h>
+void leds_dump(void) __banked;
+
+#endif
diff --git a/rtl837x_regs.h b/rtl837x_regs.h
index 473024a..6232a42 100644
--- a/rtl837x_regs.h
+++ b/rtl837x_regs.h
@@ -23,10 +23,16 @@
 // Bytes 0/1 hold the LED mode, e.g. serial, RTL8231?
 // Blink rate is defined by setAsicRegBits(0x6520,0xe00000,rate);
 #define RTL837X_REG_LED_GLB_IO_EN	0x65DC
+#define RTL837X_REG_LED3_0_SET3		0x6524
 #define RTL837X_REG_LED3_0_SET1		0x6528
+#define RTL837X_REG_LED1_0_SET3		0x6530
+#define RTL837X_REG_LED3_2_SET2		0x6534
+#define RTL837X_REG_LED1_0_SET2		0x6538
+#define RTL837X_REG_LED3_2_SET1		0x653C
 #define RTL837X_REG_LED1_0_SET1		0x6540
 #define RTL837X_REG_LED3_2_SET0		0x6544
 #define RTL837X_REG_LED1_0_SET0		0x6548
+#define RTL837X_LED_PORT_SET_SEL	0x654c
 
 // SMI control
 #define RTL837X_REG_SMI_PORT0_5_ADDR	0x644C
diff --git a/rtlplayground.c b/rtlplayground.c
index add7643..f0989fe 100644
--- a/rtlplayground.c
+++ b/rtlplayground.c
@@ -13,6 +13,7 @@
 #include "rtl837x_port.h"
 #include "rtl837x_stp.h"
 #include "rtl837x_igmp.h"
+#include "rtl837x_leds.h"
 #include "dhcp.h"
 #include "cmd_parser.h"
 #include "uip/uipopt.h"
@@ -2104,6 +2105,7 @@ void bootloader(void)
 	}
 #endif
 	set_sys_led_state(SYS_LED_SLOW);
+	leds_dump();
 
 #ifdef DEBUG
 	// This register seems to work on the RTL8373 only if also the SDS