;****************************************
;*                                      *
;* KK  K EEEEE RRRR  NN  N  AAA  LL     *
;* KK KK EE    RR  R NNN N AA  A LL     *
;* KKK   EE    RR  R NNN N AA  A LL     *
;* KKK   EEEE  RRRR  NNNNN AAAAA LL     *
;* KK K  EE    RR  R NN NN AA  A LL     *
;* KK KK EE    RR  R NN NN AA  A LL     *
;* KK KK EEEEE RR  R NN NN AA  A LLLLL  *
;*                                      *
;***************************************
;
;***************************************
;* C64 KERNAL                          *
;*   MEMORY AND I/O DEPENDENT ROUTINES *
;* DRIVING THE HARDWARE OF THE         *
;* FOLLOWING CBM MODELS:               *
;*   COMMODORE 64 (NTSC OR PAL VIDEO)  *
;* COPYRIGHT (C) 1983 BY               *
;* COMMODORE BUSINESS MACHINES (CBM)   *
;***************************************
;
;***************************************
;* THIS SOFTWARE IS FURNISHED FOR USE  *
;* USE IN THE VIC OR COMMODORE COMPUTER*
;* SERIES ONLY.                        *
;*                                     *
;* COPIES THEREOF MAY NOT BE PROVIDED  *
;* OR MADE AVAILABLE FOR USE ON ANY    *
;* OTHER SYSTEM.                       *
;*                                     *
;* THE INFORMATION IN THIS DOCUMENT IS *
;* SUBJECT TO CHANGE WITHOUT NOTICE.   *
;*                                     *
;* NO RESPONSIBILITY IS ASSUMED FOR    *
;* RELIABILITY OF THIS SOFTWARE. RSR   *
;*                                     *
;***************************************

Context

This is based on the original C64 KERNAL source from the Dennis Jarvis disk images maintained by Steve Gray, with the 901227-03 changes added. The source has been converted to lower case and LF line breaks, and adapted to work with the cc65/ca65 assembler. All original symbols and comments are intact.

This makes it a great base for custom C64 KERNALs.

Building

• Use make to build.
• Requires cc65.
• The resulting file kernal.bin contains the range of $E4B7-$FFFF of the 901227-03 ROM, i.e. everything except the BASIC V2 overflow area.