mbv: now with functioning timer interrupts!

And a few other nice things.
The bootloader now has an embedded wozmon!
If you know its offset, you can jump to it from the app.

mbv/hal/pol0.h

@@ -0,0 +1,18 @@
+// Platform definitions for pol0
+
+// LED output
+#define GPIO0_BASE (0x40000000)
+
+// /dev/ttyUSB1
+#define UART0_BASE (0x40600000)
+
+// Interrupt controller
+#define INTC_BASE (0x41200000)
+
+// It's uh.. a timer.
+#define TIMER0_BASE (0x41c00000)
+
+// IRQs
+#define UART0_IRQN (0)
+#define TIMER0_IRQN (1)
+#define NIRQ (2)