According to one hack, the difference is (also, apparently a couple pins got swapped around?) down to one singular character: the STM32F103C8T6 substituted by a STM32F103C BT6 (which happens to be double the Flash, a rather important difference). Maybe that's the problem, it doesn't know I can put a more functional version on here? (Can I?) The best I can figure right now, - and I have no fucking clue how this isn't made clear anywhere in the documentation - it seems that ONLY the ST-LINK V2.1, NOT the -A or -B, NOT the ST-LINK/V2 that's sold, NOT the STM32F429I-DISCO (but yes the -DISC1?), and probably so on with other boards (Nucleo etc.), support VCP and DFU (or some combination anyways). I guess that would be okay for updating the ST-Link, but I can already do that with the updater tool, at least with whatever firmware version it detects I should have. it looks like he's working with a Maple board, using Arduino IDE or something like that? And you suppose the tools might be similar enough to ST-Link stuff that there's a procedure that might work? I don't need a DFU, that appears to be a USB bootloader thing. Thanks, that was quite an effort! I don't see where he's doing anything that applies here though. ass ) extension (substation subs) Did that in 10 minutes do not expect perfection The hack presented may worth the time wasted learning it Paul Save the script as the same name of the video with (. Code:  Title: MapleMiniHack ScriptType: v4.00+ WrapStyle: 0 ScaledBorderAndShadow: yes YCbCr Matrix: TV.601 PlayResX: 1280 PlayResY: 720 Format: Name, Fontname, Fontsize, Primar圜olour, Secondar圜olour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding Style: Default,Arial,20,&H00FFFFFF,&H000000FF,&H00000000,&H00000000,0,0,0,0,100,100,0,0,1,2,2,2,10,10,10,1 Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text Dialogue: 0,0:07:07.38,0:07:10.02,Default,0,0,0,After finishing this procedure we must press RESET and the COM port should appear as usual.