I've looked for an exactly answer but I really couldn't find it. So can someone let me know the why of doing what I'm asking correctly?
if you don't have Bitcoin-core and bitcoin cash already installed alongside, follow my answer in here to install Bitcoin-cash alongside Bitcoin-core.
It's so important creating a different username than bitcoin username because bitcoin and bitcoin cash use the same directory.
Now login to Bitcoin username and edit this file
so it becomes like that:
rpcuser=myusername rpcpassword=myRPCpa$$word daemon=1 server=1 rpcport=5345
in here we are using different RPC port to bitcoin core. to know more about bitcoin config see this website.
Now, do the same thing to Bitcoin-cash, and everything should work as it supposed to be.
if you have a firewall enabled, don't forget to allow chosen ports.
First you need to change their data directory. Run one of them, either BTC or BCH, with
-datadir=C:/somewhere. Then create
bitcoin.conf in that folder. It should look like:
server=1 rpcuser=bitcoinrpc rpcpassword=something rpcport=8334
Make sure to set
rpcport to something other than
8333. Also, add
port=something to the
bitcoin.conf of which node software that you like less.