Roland D-5 RAM dump without memory card? – Hardware (Instruments and Effects) Forum

My old Roland D-5 needs to have its battery replaced.
How do I do a tone RAM dump from and then to the D-5 again without it losing all its settings and my own user patches?
The manual describes how to do a tone RAM dump to a memory card, but I only have a ROM card.
Is there a way to do some kind of RAM dump to and from my Windows computer (with for instance my Bitwig Studio 16-track and my Arturia Keystep32 for the MIDI I/O)?
I own both original D-5 manuals and have found a video on YouTube about how to do the battery replacement, but nothing on saving the RAM data.

TIA, Bart