Install 64tass by entering the following commands in the terminal
Update package repositories and get latest package information.
sudo apt update -y
Install the packages and dependencies with -y flag.
sudo apt install -y 64tass
Now that you have your 64tass installed
Package Description: cross (turbo) assembler targeting the MOS 65xx series of micro processors
OS: Ubuntu 20.04 LTS Focal Fossa
Dependent Packages (you may have to install the packages below if it is not installed automatically or is not available on your computer) :
shared low-level terminfo library for terminal handling (64-bit)
cross (turbo) assembler targeting the MOS 65xx series of micro processors