diff --git a/src/main/kc/include/cbm.h b/src/main/kc/include/cbm.h
new file mode 100644
index 000000000..9dcfa6c07
--- /dev/null
+++ b/src/main/kc/include/cbm.h
@@ -0,0 +1,61 @@
+// Commodore Kernal functions
+// See http://www.c64os.com/post/c64kernalrom#iec_acptr
+// Compatible with https://github.com/cc65/cc65/blob/master/include/cbm.h
+
+// Constants to use with cbm_open() for opening a file for reading or writing without the need to append ",r" or ",w" to the filename.
+#define CBM_READ        0       /* default is ",p" */
+#define CBM_WRITE       1       /* ditto */
+#define CBM_SEQ         2       /* default is ",r" -- or ",s" when writing */
+
+// IEC
+// Read one byte from talking device
+unsigned char cbm_k_acptr (void);
+
+unsigned char cbm_k_chkin (unsigned char FN);
+void cbm_k_ciout (unsigned char C);
+unsigned char cbm_k_ckout (unsigned char FN);
+void cbm_k_clall (void);
+void cbm_k_clrch (void);
+unsigned char cbm_k_getin (void);
+unsigned cbm_k_iobase (void);
+void cbm_k_listen (unsigned char dev);
+unsigned char cbm_k_readst (void);
+void cbm_k_scnkey (void);
+void cbm_k_second (unsigned char addr);
+
+// Set logical file number, device number and secondary address
+// lfn: logical file number
+// dev: device number
+// sa: secondary address
+void cbm_k_setlfs(unsigned char lfn, unsigned char dev, unsigned char sa);
+
+// Set filename or command string
+// name: file name
+void cbm_k_setnam (const char* name);
+
+// Open logical file
+unsigned char cbm_k_open (void);
+
+// Close logical file
+// lfn: Logical file number
+void cbm_k_close (unsigned char lfn);
+
+// Load or Verify data
+// flag: load=0, verify=1
+// addr: pointer to start address
+// returns pointer to last byte loaded
+char* cbm_k_load(unsigned char flag, char* addr);
+
+// Save memory to disk/tape
+// start: pointer to start address
+// end: End address
+// return: 
+unsigned char cbm_k_save(char* start, char* end);
+
+
+void cbm_k_settim (unsigned long timer);
+void cbm_k_talk (unsigned char dev);
+void cbm_k_tksa (unsigned char addr);
+void cbm_k_udtim (void);
+void cbm_k_unlsn (void);
+void cbm_k_untlk (void);
\ No newline at end of file