Alright you're probably not going to believe this since I am still having a hard time believing it, but contrary to what I'd thought was true it appears 100% possible to run CapDVHS 2003 (v0.3.0.6) on 64-Bit Win7 Pro in order to capture firewire feed from my JVC DT100U.
I know, lots of discussion here has dealt with attempts at firewire recording from Motorola DVR's of various types and firmware versions, and which always insisted that it was only the 32-bit firewire drivers that existed to support firewire connection from the DVR. So I just assumed this would also be true of trying to make PC recordings from my older DVHS (copy-freely) recordings originally made years ago from offloads via firewire from Motorola DCT/DCH DVRs (which never had serious firewire problems as the DCX family did) to my DVHS VCR's. In other words I would have to use CapDVHS with my old 32-bit WinXP system, along with the very old 32-bit firewire drivers for DVHS machines acquired many years when CapDVHS was also downloaded.
Well, today I received the 15-foot 4/6-pin firewire cable from Monoprice that I'd bought so that I could begin transferring my old "So You Think You Can Dance" DVHS tapes to TS->MPG, expecting full well to be forced back to 32-bit WinXP to do that.
You can imagine my surprise when plugging in the new firewire cable and connecting my DT100U to my PC saw what appeared to be 64-bit Win7 Pro seemingly going to the MS Windows Update site to retrieve and install the appropriate drivers for the JVC DVHS VCR. This seemed to be going without a hitch, and sure enough when it was all done the only device that did not get a suitable driver was for the "AV/C tuner" in the VCR:
Seemed ok to me, since I only cared about CapDVHS being able to control the tape deck mechanism, not the tuner. And the drivers to support the rest of the DT100U appeared to get installed successfully!! Hmmm... presumably these were all appropriate 64-bit drivers that just got installed.
So would CapDVHS work in a 64-bit environment, with the 64-bit drivers for the DT100U DVHS tape deck components that had just gotten installed??? Would I actually be able to do this tape->TS transfer from DVHS under 64-bit Win7 Pro, and never actually have to look at WinXP again even for just this very special task???
I then manually pushed PLAY on the VCR to begin playback. And with playback now proceeding I pushed the REC button on CapDVHS (which had already surprised me enough even by just starting up and running seemingly without a complaint). Astonishingly, I saw the time counter moving along normally, exactly as if it were really doing its recording!!
After a few minutes I pushed STOP on CapDVHS, and looked in the \CapDVHS folder with Explorer. Sure enough there lived a new TS file of several hundred megabytes, exactly as expected. I then OPEN'd it, and sure enough those few recorded moments from the DVHS tape now appeared on my PC!!!
So sure enough, it would appear that the automatically downloaded MS-provided 64-bit drivers for firewire access to/from the DT100U seems to be 100% compatible with CapDVHS, all of which seems to work together perfectly on 64-bit Win7 Pro!!!
To say that I am astonished would be an understatement. I really could not be happier, as I now begin the project of transferring all of my copy-freely DVHS tapes to TS with CapDVHS under 64-bit Win7, and then edited TS->MPG with VideoReDo.
Very very exciting. Good news, if you are a DVHS VCR owner.