diff --git a/rtl/Makefile b/rtl/Makefile
index e7ff0673..435079d8 100644
--- a/rtl/Makefile
+++ b/rtl/Makefile
@@ -15,7 +15,15 @@ RTL_IP := ./ip/spram_model.v \
       ./ip/counter_timer.v \
       ./ip/spi_slave.v \
       ./ip/ravenna_spi.v \
-      ./ip/spiflash.v
+      ./ip/spiflash.v \
+      ./ip/cust/register.v \
+      ./ip/cust/archinfo.v \
+      ./ip/cust/AXI4Lite_To_APB_Bridge/RTL/flop.v \
+      ./ip/cust/AXI4Lite_To_APB_Bridge/RTL/address_decoder.v \
+      ./ip/cust/AXI4Lite_To_APB_Bridge/RTL/read_data_mux.v \
+      ./ip/cust/AXI4Lite_To_APB_Bridge/RTL/apb_master.v \
+      ./ip/cust/AXI4Lite_To_APB_Bridge/RTL/axi_apb_bridge.v \
+      ./ip/axil_ip_wrapper.v
 
 RTL_TECH := ../tech/tc_io.v \
             ../tech/tc_clk.v \
@@ -36,7 +44,7 @@ retrosynsim: retrosoc_syn_tb.vvp retrosoc_fw.hex
 	vvp -N $< +firmware=retrosoc_fw.hex +syn_$(WAVE) -fst
 
 
-retrosoc_tb.vvp: retrosoc_tb.v retrosoc_asic.v  retrosoc.v picorv32.v $(RTL_IP) $(RTL_TECH) $(RTL_PDK)
+retrosoc_tb.vvp: retrosoc_tb.v retrosoc_asic.v  retrosoc.v picorv32.v $(RTL_TECH) $(RTL_PDK) $(RTL_IP)
 	iverilog $(RTL_INC) -s retrosoc_tb -o $@ $^
 
 retrosoc_syn_tb.vvp: retrosoc_tb.v ../syn/yosys/out/retrosoc_asic_yosys.v ./ip/spiflash.v $(RTL_PDK)
diff --git a/rtl/firmware.c b/rtl/firmware.c
index 008e4762..bfe7f670 100644
--- a/rtl/firmware.c
+++ b/rtl/firmware.c
@@ -664,6 +664,14 @@ void ip_i2c_test()
     i2c_send(0x6, 0xfa);
 }
 
+void ip_archinfo_test() {
+    print("[IP] archinfo test\n");
+
+    print_reg("[ARCHINFO SYS]", reg_archinfo_sys, 8);
+    print_reg("[ARCHINFO IDL]", reg_archinfo_idl, 8);
+    print_reg("[ARCHINFO IDH]", reg_archinfo_idh, 8);
+}
+
 void main()
 {
     // reg_uart_clkdiv = 104; // for 100M
@@ -694,12 +702,13 @@ void main()
     // cmd_print_spi_state();
 
     // ip_counter_timer_test();
-    ip_gpio_test();
-    ip_i2c_test();
+    // ip_gpio_test();
+    // ip_i2c_test();
+    ip_archinfo_test();
     // cmd_benchmark(true, 0);
     // cmd_benchmark_all();
     // cmd_memtest();
-    cmd_echo();
+    // cmd_echo();
     while (1)
         ;
     // while (1) {
diff --git a/rtl/firmware.h b/rtl/firmware.h
index ad30ad9f..f0a63f41 100644
--- a/rtl/firmware.h
+++ b/rtl/firmware.h
@@ -49,9 +49,12 @@
 #define reg_timer1_value   (*(volatile uint32_t*)0x0300006c)
 #define reg_timer1_data    (*(volatile uint32_t*)0x03000070)
 
-// archinfo
-// rng
-// 
+#define reg_archinfo_sys   (*(volatile uint32_t*)0x03000100)
+#define reg_archinfo_idl   (*(volatile uint32_t*)0x03000104)
+#define reg_archinfo_idh   (*(volatile uint32_t*)0x03000108)
+
+
+
 
 // command register bits
 // bit 7 = start
diff --git a/rtl/ip/apb_wrapper.v b/rtl/ip/apb_wrapper.v
deleted file mode 100644
index 6547a1e4..00000000
--- a/rtl/ip/apb_wrapper.v
+++ /dev/null
@@ -1,2 +0,0 @@
-module apb_wrapper ();
-endmodule