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diff --git a/docs/pypowersim.mdwn b/docs/pypowersim.mdwn
index 178b3fcf66c7a340e0a9ab044a00f5c755ed2f25..519f9aa64453371847b17a061d3c434b112a2bf7 100644 (file)
--- a/docs/pypowersim.mdwn
+++ b/docs/pypowersim.mdwn
@@ -74,6 +74,18 @@ example script
    9 7: 1             # param 5: ptr_diff_t incr      1
 ```
 
+**Example SPR file**
+
+See <https://git.libre-soc.org/?p=openpower-isa.git;a=blob;f=media/common.spr;hb=HEAD>
+
+This file sets SPRs to explicit values prior to execution. In this
+example Link Register LR is set to 0xffffffff which on completion
+of the function sets PC to an invalid out-of-bounds value causing
+program termination.
+
+```
+```
+
 ### Before running the tests!
 
 **NOTE**: Is this correct?