diff --git a/tech/RP2040.wiki b/tech/RP2040.wiki
index 2c8a917..5b5f36f 100644
--- a/tech/RP2040.wiki
+++ b/tech/RP2040.wiki
@@ -4,6 +4,14 @@ Raspberry pi's micrcontroler, based on the RP2040
 
 See datasheet https://datasheets.raspberrypi.org/pico/pico-datasheet.pdf
 
+== Interrupts ==
+
+Hardware interrupts uses standard ARM nested vectored interrupt controller.
+Interrupts have ID 0-31. The RP2040 only uses 0-26, the rest are tied to
+ground. Both cores are tied to the same interrupt lines.
+
+*Do not enable the same interrupt on both cores*, as this leads to race
+conditions.
 
 
 [[index]]