diff --git a/tech/arduino_nano.wiki b/tech/arduino_nano.wiki
index cffdf25..9c76311 100644
--- a/tech/arduino_nano.wiki
+++ b/tech/arduino_nano.wiki
@@ -55,36 +55,6 @@ a pin to one (1) will enable it for output. The three DDR* registers are DDRB,
 which allow for input to taken. These registers are read only. The three PIN*
 registers are PINB (0x23), PINC (0x26), and PIND (0x29).
 
-
-* PortC
-  - Port C data regiser
-  - 0x28
-  - R/W 8bits
-* DDRC
-  - Port C data direction register
-  - 0x27
-  - R/W 8bits
-* PINC
-  - Port C input pints address
-  - 0x26
-  - R 8bits
-* PortB
-  - Port B data register
-  - 0x25
-  - R/W 8bits
-* DDRB
-  - Port B data direction register
-  - 0x24
-  - R/W 8bits
-* PINB
-  - Port B Input pins address
-  - 0x23
-  - R 8bit
-
-Same pattern:
-* PortD
-  - 0x2B - 0x29
-
 === Interrupts ===
 
 Interrupts are the same as OS typical interrupts, controlled by the Interrupt