diff --git a/defines.h b/defines.h
index 172b3ce..3a71dc0 100644
--- a/defines.h
+++ b/defines.h
@@ -162,13 +162,14 @@
   #define SDA I2C_SDA
   #define SCL I2C_SCL
   
+  // these don't work...
+  //extern const uint16_t PROGMEM port_to_input_PGM[];
+  //extern const uint16_t PROGMEM port_to_output_PGM[];
+  //extern const uint8_t PROGMEM digital_pin_to_bit_mask_PGM[];
+  //#define digitalPinToBitMask(P) ( pgm_read_byte( digital_pin_to_bit_mask_PGM + (P) ) )
   //#define portOutputRegister(P) ( (volatile uint8_t *)( pgm_read_word( port_to_output_PGM + (P))) )
   //#define portInputRegister(P) ( (volatile uint8_t *)( pgm_read_word( port_to_input_PGM + (P))) )
-  //#define digitalPinToBitMask(P) ( pgm_read_byte( digital_pin_to_bit_mask_PGM + (P) ) )
-  #define portOutputRegister(port)   ( &(port->OUT.reg) )
-  #define portInputRegister(port)    ( &(port->IN.reg) )
-  //#define portModeRegister(port)     ( &(port->DIR.reg) )
-  char16_t digitalPinToBitMask(char16_t P) { return digitalPinToPinName(P);}
+  
 /* TODO when ready 
 #elif defined(ARDUINO_ARCH_RP2040)
   #define ARDUINO_TYPE "RP2040"