diff --git a/CMakeLists.txt b/CMakeLists.txt
index cb09311..ef288c7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,7 +72,8 @@ target_compile_options(PicoMite PRIVATE 	-DPICOMITE
 	                                        -DPICO_CORE1_STACK_SIZE=0x00 
 	                                        -DPICO_HEAP_SIZE=0x500 
                                         	-O2 
-                                            -Wall)
+                                            -Wall
+                                            -DPICOCALC)
 target_link_libraries(PicoMite
     pico_stdlib
     hardware_flash
diff --git a/Editor.h b/Editor.h
index b0cb113..8d055a4 100644
--- a/Editor.h
+++ b/Editor.h
@@ -60,14 +60,22 @@ extern int editactive;
 #define LEFT      0x82
 #define RIGHT     0x83
 #define INSERT    0x84
+#ifdef PICOCALC
+#define DEL       0xd4
+#else
 #define DEL       0x7f
+#endif
 #define HOME      0x86
 #define END       0x87
 #define PUP       0x88
 #define PDOWN     0x89
 #define NUM_ENT   ENTER
 #define SLOCK     0x8c
+#ifdef PICOCALC
+#define ALT       0xa1
+#else
 #define ALT       0x8b
+#endif
 
 
 // definitions related to setting the tab spacing
diff --git a/Hardware_Includes.h b/Hardware_Includes.h
index cafaf87..06f34b3 100644
--- a/Hardware_Includes.h
+++ b/Hardware_Includes.h
@@ -261,19 +261,33 @@ extern struct tagMTRand *g_myrand;
 #define DOWN		0x81
 #define LEFT		0x82
 #define RIGHT		0x83
+#ifdef PICOCALC
+#define DOWNSEL     0x89
+#else
 #define DOWNSEL     0xA1
+#endif
 #define RIGHTSEL    0xA3
 #define INSERT		0x84
+#ifdef PICOCALC
+#define DEL			0xd4
+#else
 #define DEL			0x7f
+#endif
 #define HOME		0x86
 #define END			0x87
 #define PUP			0x88
 #define PDOWN		0x89
 #define NUM_ENT		ENTER
 #define SLOCK		0x8c
+#ifdef PICOCALC
+#define ALT			0xa1
+#define SHIFT_TAB	0x86
+#define SHIFT_DEL	0x87
+#else
 #define ALT			0x8b
 #define	SHIFT_TAB 	0x9F
 #define SHIFT_DEL   0xa0
+#endif
 #define CTRLKEY(a) (a & 0x1f)
 #define DISPLAY_CLS             1
 #define REVERSE_VIDEO           3