diff --git a/atusb/fw/Makefile b/atusb/fw/Makefile
index 7bd445a..50c53f0 100644
--- a/atusb/fw/Makefile
+++ b/atusb/fw/Makefile
@@ -17,10 +17,10 @@ DIRS=common boot atusb
 .PHONY:		all depend install uninstall clean spotless
 
 all:
-		for d in $(DIRS); do make -C $$d all || exit 1; done
+		for d in $(DIRS); do $(MAKE) -C $$d all || exit 1; done
 
 depend:
-		for d in $(DIRS); do make -C $$d depend || exit 1; done
+		for d in $(DIRS); do $(MAKE) -C $$d depend || exit 1; done
 
 # Top-level Makefile recurses for "install" and "uninstall", which have no use
 # here. Just ignore them.
@@ -30,7 +30,7 @@ install:
 uninstall:
 
 clean:
-		for d in $(DIRS); do make -C $$d clean || exit 1; done
+		for d in $(DIRS); do $(MAKE) -C $$d clean || exit 1; done
 
 spotless:
-		for d in $(DIRS); do make -C $$d spotless || exit 1; done
+		for d in $(DIRS); do $(MAKE) -C $$d spotless || exit 1; done
diff --git a/atusb/fw/atusb/Makefile b/atusb/fw/atusb/Makefile
index 975051b..595ab52 100644
--- a/atusb/fw/atusb/Makefile
+++ b/atusb/fw/atusb/Makefile
@@ -18,8 +18,9 @@ F32XBASE = ../../../../f32xbase
 
 include $(F32XBASE)/fw/common/Makefile.system
 include $(F32XBASE)/fw/common/Makefile.common
+include ../common/Makefile.common
 
-CFLAGS += -I../common -I../include
+CFLAGS += -I../common -I../include -D$(BOARD)
 LDFLAGS += --code-size $(PAYLOAD_SIZE) --code-loc $(PAYLOAD_START)
 
 USB_ID = $(shell \
diff --git a/atusb/fw/atusb/atusb.c b/atusb/fw/atusb/atusb.c
index 1a6496c..21e2b01 100644
--- a/atusb/fw/atusb/atusb.c
+++ b/atusb/fw/atusb/atusb.c
@@ -59,6 +59,35 @@ void test_mode(void)
 }
 
 
+/*
+ * The following macros set all unused pins on a given port to zero. This is
+ * more elaborate than just setting the ports directly, but it has the
+ * advantage of hiding the pin to port relation.
+ */
+
+#define	PORT_NUM_P0	0
+#define	PORT_NUM_P2	2
+#define	PORT_NUM_P3	3
+
+#define	__PORT_NUM(mode) PORT_NUM_##mode
+#define	PORT_NUM(mode)	__PORT_NUM(mode)
+
+#define	USED(port, net) (PORT_NUM(net##_PORT) == port ? 1 << net##_BIT : 0)
+
+#define	ZERO_UNUSED(port) \
+	P##port &= \
+	    USED(port, LED)	| \
+	    USED(port, ID)	| \
+	    USED(port, MOSI)	| \
+	    USED(port, MISO)	| \
+	    USED(port, SCLK)	| \
+	    USED(port, nSS)	| \
+	    USED(port, nRST_RF)	| \
+	    USED(port, IRQ_RF)	| \
+	    USED(port, SLP_TR)	| \
+	    USED(port, TST)
+
+	
 static void init_io(void)
 {
 	/*
@@ -91,8 +120,13 @@ static void init_io(void)
 	SLP_TR = 0;
 	SLP_TR_MODE |= 1 << SLP_TR_BIT;
 
-	P0 = 1;	/* IRQ_RF = 1; LED = 0; TST = Z; the rest is unused */
-	P3 = 0;
+	IRQ_RF = 1;
+	LED = 0;
+	TST = 0;
+
+	ZERO_UNUSED(0);
+	ZERO_UNUSED(2);
+	ZERO_UNUSED(3);
 
 #if 0
 	/*
diff --git a/atusb/fw/boot/Makefile b/atusb/fw/boot/Makefile
index 1baf3c2..3872afb 100644
--- a/atusb/fw/boot/Makefile
+++ b/atusb/fw/boot/Makefile
@@ -17,6 +17,7 @@ F32XBASE = ../../../../f32xbase
 
 include $(F32XBASE)/fw/common/Makefile.system
 include $(F32XBASE)/fw/common/Makefile.common
+include ../common/Makefile.common
 
-CFLAGS += -I../common -I../include
+CFLAGS += -I../common -I../include -D$(BOARD)
 LDFLAGS += --code-size $(PAYLOAD_START)
diff --git a/atusb/fw/common/Makefile b/atusb/fw/common/Makefile
index 85cf3ac..dec1b7d 100644
--- a/atusb/fw/common/Makefile
+++ b/atusb/fw/common/Makefile
@@ -10,6 +10,8 @@
 # (at your option) any later version.
 #
 
+include Makefile.common
+
 
 GEN_quiet	= @echo "  GENERATE " $@ &&
 
@@ -25,7 +27,7 @@ endif
 all:		io-parts.h
 
 io-parts.h:	io.h Makefile
-		$(GEN) $(CPP) -dD $< | \
+		$(GEN) $(CPP) -D$(BOARD) -dD $< | \
 		  sed '1,/IO_H/d' | \
 		  awk \
 		  'BEGIN { print "/* MACHINE-GENERATED. DO NOT EDIT ! */"; \
diff --git a/atusb/fw/common/Makefile.common b/atusb/fw/common/Makefile.common
new file mode 100644
index 0000000..1952214
--- /dev/null
+++ b/atusb/fw/common/Makefile.common
@@ -0,0 +1,14 @@
+#
+# common/Makefile.common - Makefile settings shared within project
+#
+# Written 2010 by Werner Almesberger
+# Copyright 2010 Werner Almesberger
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+
+#BOARD=BOARD_100813
+BOARD=BOARD_101216
diff --git a/atusb/fw/common/config.h b/atusb/fw/common/config.h
index 19ed150..1db0de1 100644
--- a/atusb/fw/common/config.h
+++ b/atusb/fw/common/config.h
@@ -39,6 +39,12 @@
 
 /* ----- Application configuration ----------------------------------------- */
 
+#if defined(BOARD_1008xx)
 #define	HW_TYPE		HW_TYPE_100813
+#elif defined(BOARD_1012xx)
+#define	HW_TYPE		HW_TYPE_101216
+#else
+#error must define BOARD_1008xx or BOARD_1012xx
+#endif
 
 #endif /* !CONFIG_H */
diff --git a/atusb/fw/common/io.h b/atusb/fw/common/io.h
index eac4355..2832c3f 100644
--- a/atusb/fw/common/io.h
+++ b/atusb/fw/common/io.h
@@ -18,6 +18,17 @@
 
 #define	LED	P0_1
 
+/* ID pin */
+
+/*
+ * 100813	open
+ * 101216	GND
+ */
+
+#define	ID	P0_2
+
+#if defined(BOARD_100813)
+
 /* SPI */
 
 #define	MOSI	P2_2
@@ -32,4 +43,24 @@
 #define	SLP_TR	P2_1
 #define	TST	P0_7
 
+#elif defined(BOARD_101216)
+
+/* SPI */
+
+#define	MOSI	P2_1
+#define	MISO	P2_0
+#define	SCLK	P0_7
+#define	nSS	P2_4
+
+/* Miscellaneous RF signals */
+
+#define	nRST_RF	P0_6
+#define	IRQ_RF	P0_0
+#define	SLP_TR	P0_5
+#define	TST	P0_4
+
+#else
+#error must define BOARD_1008xx or BOARD1012xx
+#endif /* !BOARD_101216 */
+
 #endif /* !IO_H */
diff --git a/atusb/fw/include/atusb/ep0.h b/atusb/fw/include/atusb/ep0.h
index ef8d325..cb6acd1 100644
--- a/atusb/fw/include/atusb/ep0.h
+++ b/atusb/fw/include/atusb/ep0.h
@@ -43,7 +43,8 @@
 #define EP0ATUSB_MAJOR	0	/* EP0 protocol, major revision */
 #define EP0ATUSB_MINOR	1	/* EP0 protocol, minor revision */
 
-#define	HW_TYPE_100813	0	/* 100813 */
+#define	HW_TYPE_100813	0	/* 2010-08-13 */
+#define	HW_TYPE_101216	1	/* 2010-12-16 */
 
 
 /*