Boss DR-55 memory chip replacement. TC5501P Posted on December 28, 2017February 9, 2018 by SynTeknik I have now successfully replaced the memory chip with a new Toshiba TC5501P. I’ve installed it in a socket and it all works. Result! Full details with photos tomorrow. Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Pinterest (Opens in new window) Related