diff --git a/firmware/ice40-riscv/icE1usb/config.h b/firmware/ice40-riscv/icE1usb/config.h
new file mode 100644
index 0000000..e10a120
--- /dev/null
+++ b/firmware/ice40-riscv/icE1usb/config.h
@@ -0,0 +1,18 @@
+/*
+ * config.h
+ *
+ * Copyright (C) 2019-2020  Sylvain Munaut <tnt@246tNt.com>
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
+#pragma once
+
+#define SPI_FLASH_BASE	0x80000000
+#define UART_BASE	0x81000000
+#define LED_BASE	0x82000000
+#define USB_CORE_BASE	0x83000000
+#define USB_DATA_BASE	0x84000000
+#define E1_DATA_BASE	0x85000000
+#define DMA_BASE	0x86000000
+#define E1_CORE_BASE	0x87000000
+#define MISC_BASE	0x88000000