JP1 Remotes

Many years ago I built a simple 3 transistor serial interface designed and published by Tommy N.Tyler.
just discovered recently, that the last version of RMIR that still works with this built is RMIR-2.12.15 with serial interface v0.25.
if I try to use it with any newer version, got a " remote not found " message.
my system is Windows 11 64 bit with Java 25.0.1 and remote used an a 1056B03 Jp1.2 MaxQ610

I'll let others speak to whether your serial cable can still be used, but have you thought about upgrading to a more modern cable, like an FTDI FT232RL USB cable? You can get these for under $10 USD if you don't mind waiting for delivery from China. Please note, however, that they don't ship with the standard 2*3 connector that we need for JP1 remotes, so you will have to replace the connector (more info on the wiki page).

Here's a cable on eBay for under $10 that should work:
https://www.ebay.com/itm/389129605593

I have a FT232RL Type-C USB 3.3V 5.5V to TTL Serial Adapter Module, with signals TXD, RXD, ERS, DTR,CTS, and +5 V, +3V3, GND
Would that work ?
If yes, can you tell me what signal goes where on remote's connector pins?
Thanks!

It won't work without RTS. I've never heard of ERS.

My mistake, small print on board...
CTS...RXL...TXL...DTR...RX...TX...TXD...RTS...RXD...RI
So I have RTS and the chip is FTDI FT232RL