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Thread: DeRamp Virtual Sector Generator!

  1. #1
    Join Date
    Oct 2011
    Bedford, NH, USA

    Default DeRamp Virtual Sector Generator!

    When I acquired my Northstar Horizon, I was pleased that a DeRamp Virtual Sector Generator cam along with it. I have not been using it, in favor of exercising my period-correct belt-driven drives to keep them operating properly as long as I can. My real problem came from the fact that I own only a small handful of good 10 sector hard sector floppy diskettes.

    Today, I thought that I'd take the plunge and give the VSG a tryout. I have a pair of Tandon TM65-2L half-height direct drive floppy drives set up so I can plug them into any of my systems that can use them. I plugged them into my Northstar controller, and all I can say is WOW, WOW, WOW! The VSG is a fantastic interface.

    My Horizon is a full system with NS Z-80 Processor, NS 64K Dynamic RAM, and Double Density NS Floppy Controller. The floppy drives in the Horizon are single sided double density drives, providing a net 163K of storage. The Tandon drives I tried this with are double sided double density, and they provide a net 338K of storage.

    The VSG has been working flawlessly for me with this setup. I now can enjoy floppies with double the storage than I've been sometimes struggling with, and best of all, the floppies are the same commonly available soft sector disks I use for other systems.

    Wow. All I can say is wow. Here is a monster shout out to Mike Douglas for creating an excellent interface! Thanks a million, Mike!

    Here's a link, if anyone is interested:

    Last edited by smp; September 26th, 2018 at 12:16 PM. Reason: added the link...

  2. #2


    I second this enthusiastic endorsement. I have mine running with a Sol and North Star disk system - the original single density controller and Shugart-400. That first transfer via Xmodem worked without a hitch and I’ve had zero problems since.

    Also, as my kids said, you know your dad’s hobby is weird when his computer parts sound like a piece that fell off the Millennium Falcon.

  3. #3


    I've got one too on my NorthStar and it works fine.

  4. #4


    I am using Mike's VSG too with a SOL-20 and a pair of IBM YD-580 direct drive 48 tpi drives with the VSG installed in the housing with them and a North Star DD controller card in the SOL. The VSG works perfectly, it is a very good interface to get.


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