--- /dev/null
+samd21_scs = 0xe000e000;
+samd21_systick = 0xe000e010;
+samd21_nvic = 0xe000e100;
+samd21_scb = 0xe000ed00;
+
+samd21_ahb_apb_a = 0x40000000;
+samd21_pac0 = 0x40000000;
+samd21_pm = 0x40000400;
+samd21_sysctrl = 0x40000800;
+samd21_gclk = 0x40000c00;
+samd21_wdt = 0x40001000;
+samd21_rtc = 0x40001400;
+samd21_rtc = 0x40001400;
+samd21_eic = 0x40001800;
+
+samd21_ahb_apb_b = 0x41000000;
+samd21_pac1 = 0x41000000;
+samd21_dsu = 0x41002000;
+samd21_nvmctrl = 0x41004000;
+samd21_port_a = 0x41004400;
+samd21_port_b = 0x41004480;
+samd21_dmac = 0x41004800;
+samd21_usb = 0x41005000;
+samd21_mtb = 0x41006000;
+
+samd21_ahb_apb_c = 0x42000000;
+samd21_pac2 = 0x42000000;
+samd21_evsys = 0x42000400;
+samd21_sercom0 = 0x42000800;
+samd21_sercom1 = 0x42000c00;
+samd21_sercom2 = 0x42001000;
+samd21_sercom3 = 0x42001400;
+samd21_sercom4 = 0x42001800;
+samd21_sercom5 = 0x42001c00;
+samd21_tcc0 = 0x42002000;
+samd21_tcc1 = 0x42002400;
+samd21_tcc2 = 0x42002800;
+samd21_tc3 = 0x42002c00;
+samd21_tc4 = 0x42003000;
+samd21_tc5 = 0x42003400;
+samd21_tc6 = 0x42003800;
+samd21_tc7 = 0x42003c00;
+samd21_adc = 0x42004000;
+samd21_ac = 0x42004400;
+samd21_dac = 0x42004800;
+samd21_ptc = 0x42004c00;
+samd21_i2s = 0x42005000;
+samd21_ac1 = 0x42005400;
+samd21_tcc3 = 0x42006000;
+
+samd21_aux0 = 0x00804000;
+samd21_aux1 = 0x00806000;
+samd21_serial = 0x0080a000;