Install xa65 by entering the following commands in the terminal:
sudo apt update sudo apt install xa65
Description:
cross-assembler and utility suite for 65xx/65816 processors
xa65 is a cross-assembler and utility suite for the 65xx series of 8-bit processors, and the 65816, a 16-bit version of the processor. The 6502 was used in computers such as the Commodore 64, Apple II, and many more.
Homepage: http://www.floodgap.com/retrotech/xa/
Version: 2.3.8-2
Section: universe/devel