C64 Visual Debugger

http://hackadaycom.files.wordpress.c.../08/c64icu.jpg

Root Labs wrote about ICU64, a Commodore 64 emulator with a couple unusual features. The most special of these is the ability to show the entire working RAM of the system. Each RAM address lights up when accessed. The user can also zoom in or change the values at each address if they want. This sounds complicated, but the demo videos demonstrate the power of these abilities. This would also serve as a great primer on lower-level code’s memory management. Unfortunately [mathfigure], the author of ICU64, hasn’t released this out to the public yet, but should be released soon.
http://hackaday.com/2009/08/29/c64-visual-debugger/