Today I cleared some things out of my parents loft, and found my old C64 disk drive and a red cartridge which I seem to remember being a reset cartridge that allowed you to program in assembler (this may be me mis-remembering) ...it has a handwritten sticker on front that says "Action reply" but I don't think it actually was branded when it boots (I have no C64 now so can't check) ....does anyone have any idea what it is?
![Image](https://s14.postimg.org/ez7o51a3l/20180306_195211.jpg)