diff --git a/interp/interp.py b/interp/interp.py
new file mode 100644
index 0000000..182af0d
--- /dev/null
+++ b/interp/interp.py
@@ -0,0 +1,26 @@
+# demonstrate driving low level rp2040 functions from Python by
+# direct register access - see datasheet at 
+# https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf
+# for details
+
+from machine import mem32
+
+# base address of SIO
+SIO_BASE = 0xD0000000
+
+# INTERP0 registers
+INTERP0_ACCUM0 = SIO_BASE + 0x80
+INTERP0_BASE0 = SIO_BASE + 0x88
+INTERP0_POP_LANE0 = SIO_BASE + 0x94
+INTERP0_CTRL_LANE0 = SIO_BASE + 0xAC
+
+# initialise lane 0 on interp: set that we are using all 32 bits
+mem32[INTERP0_CTRL_LANE0] = 0x1F << 10
+
+# set up 9 x table example - write to accum[0] and base[0] registers
+mem32[INTERP0_ACCUM0] = 0
+mem32[INTERP0_BASE0] = 9
+
+# read pop register 10 times
+for j in range(10):
+    print(mem32[INTERP0_POP_LANE0])
\ No newline at end of file