Image Map Image Map
Page 1 of 3 123 LastLast
Results 1 to 10 of 22

Thread: DC600HC IOTAMAT QIC Format

  1. #1

    Default DC600HC IOTAMAT QIC Format

    Does anyone here have experience using these types of preformated tapes, or others of the <greek alphabet>-mat formats?

    If anyone is interested, I've published my analysis on one of these blank cartridges here, and my previous experience with them:

    http://qicreader.blogspot.com/2016/0...blank-qic.html

    I'd love to hear anyone's feedback.

  2. #2
    Join Date
    Jan 2007
    Location
    Pacific Northwest, USA
    Posts
    30,304
    Blog Entries
    20

    Default

    I've got a large Adic QIC02-interface drive here and never have encountered anyone needing to use it. I believe it's an Iotamat unit (no BOT/EOT sensors), but that's just a guess. It has a card with a 6800 MPU and an EPROM bearing a 3M copyright sticker inside.

    I've got an even older 3M-branded drive where the head is fixed and appears to contain two channels. Takes DC300-type carts.

  3. #3

    Default

    Yep, I have an HP 9144A connected to my 9000/350 that uses Iotamat media. Every used Iotamat cartridge I try to order has been apparently used in a regular QIC drive and ruined.

    Related: anyone have an HP-IB tape drive or (pipe dream) CD-ROM they want to get rid of or sell? My 9000 will thank you.
    I use my C128 because I am an ornery, stubborn, retro grouch. -- Bob Masse
    Machine room: http://www.floodgap.com/etc/machines.html

  4. #4
    Join Date
    Sep 2006
    Location
    Silicon Valley
    Posts
    1,757

    Default

    Quote Originally Posted by ClassicHasClass View Post
    Yep, I have an HP 9144A connected to my 9000/350 that uses Iotamat media. Every used Iotamat cartridge I try to order has been apparently used in a regular QIC drive and ruined.

    Related: anyone have an HP-IB tape drive or (pipe dream) CD-ROM they want to get rid of or sell? My 9000 will thank you.
    You want a 9145. You really do.
    I've got a couple of them. Just need to figure out how to get one to you

  5. #5
    Join Date
    Sep 2006
    Location
    Silicon Valley
    Posts
    1,757

    Default

    Quote Originally Posted by firebirdta84 View Post
    Does anyone here have experience using these types of preformated tapes, or others of the <greek alphabet>-mat formats?

    If anyone is interested, I've published my analysis on one of these blank cartridges here, and my previous experience with them:

    http://qicreader.blogspot.com/2016/0...blank-qic.html

    I'd love to hear anyone's feedback.

    OK, a couple of things.

    I dug into all of this recently because someone REALLY wants to read some Apple 40SC Tape Backup tapes
    which uses the DC100 version of the block-addressable 3M tapes, and HP used the format for several generations
    of 1/4" tape products.

    I put what I dug up on bitsavers under 3M


    The tapes are the opposite windings of QIC format.

    There are no EOT/BOT holes, so if you stick an HC tape in a QIC drive it will spin off the end.

    3M sold the product line to Gorgens Industries in San Diego (dufunct) no idea if anyone picked up the inventory or documentation
    though I'd certainly like to know

  6. #6

    Default

    Quote Originally Posted by Al Kossow View Post
    You want a 9145. You really do.
    I've got a couple of them. Just need to figure out how to get one to you
    Are you going to VCF in August? I'll be exhibiting there.

    I've replaced the gooey capstan on it, too. What a pain.
    I use my C128 because I am an ornery, stubborn, retro grouch. -- Bob Masse
    Machine room: http://www.floodgap.com/etc/machines.html

  7. #7
    Join Date
    Sep 2006
    Location
    Silicon Valley
    Posts
    1,757

    Default

    Quote Originally Posted by ClassicHasClass View Post
    Are you going to VCF in August? I'll be exhibiting there.

    I've replaced the gooey capstan on it, too. What a pain.
    no, but I'll be in town.

    I also misunderstood what you wanted. If you really want an hpib 88780 i can give you one.

  8. #8

    Default

    Quote Originally Posted by Al Kossow View Post
    no, but I'll be in town.

    I also misunderstood what you wanted. If you really want an hpib 88780 i can give you one.
    That's like a 7980, right? I could make use of that. That would fit in the usual HP 19" rack, correct?
    I use my C128 because I am an ornery, stubborn, retro grouch. -- Bob Masse
    Machine room: http://www.floodgap.com/etc/machines.html

  9. #9

    Default

    Al, Chuck, & Bob,

    Thank you all for weighing in here. This is exactly the conversations I always appreciate here.

    Quote Originally Posted by Al Kossow View Post
    The tapes are the opposite windings of QIC format.
    This does explain why the tape was at what I'm used to as "the end" when I first opened the shrink wrapping on the cartridge.

    For all you shared, Al, I am appreciative. I just want to comment on this one thing:

    Quote Originally Posted by Al Kossow View Post
    There are no EOT/BOT holes, so if you stick an HC tape in a QIC drive it will spin off the end.
    Now, are you talking specifically about the DC100 version of the block-addressable 3M tape? If so, that is very good to note here.

    As for the DC600HC tapes I'm working with, it might be worth noting that I'm seeing something a little different. I think the BOT/EOT holes are there on these.

    It seems that, at least on the tape sample I analyzed, and the vintage DC600HC tapes that were used to originally back up the Point 4 IRIS system I'm restoring, the tape holes really are there. And, I am reading all of these in a Wangtek 5099 QIC drive, and they do not spin off the end.

    You can see that in this exact point of my video here, the EOT/BOT holes are recognized, as the tape stops at each end in a normal fashion:

    https://www.youtube.com/watch?v=1L9A...utu.be&t=9m52s

    Also, if you watch the video in the HD 1080p mode, you can fairly easily see the LEDs change on my QIC-36 interface display box for pin #s 28 and 30, for the Upper & Lower tape holes detection, respectively. I think that the LEDs go off (signal goes low) when a hole is indicated.

    Interestingly, Your CHM has as an artifact, an exact vintage version of several of my old Point 4 IRIS tapes: Scotch DC600HC.

    http://www.computerhistory.org/colle...alog/102662187

    I have now read my Scotch DC600HC tapes of this same model and vintage, using my Universal QIC reader, which uses a Wangtek 5099, and I believe that is a QIC drive, by your criteria, correct?

    It does seem to have the EOT/BOT holes.

    https://drive.google.com/file/d/0B87...puWVY2SmM/view

    That is my only point of clarification. And everything else shared here is fantastically helpful and educational, thank you everyone!

    -AJ
    Last edited by firebirdta84; May 24th, 2016 at 12:39 AM.

  10. #10

    Default

    Quote Originally Posted by ClassicHasClass View Post
    Every used Iotamat cartridge I try to order has been apparently used in a regular QIC drive and ruined.
    Bob, if you're interested, there are more of these on eBay from the same seller, apparently still shrink wrapped. If my purchased tape from this seller is any indication of his lot of these tapes, the band should still be in good condition, and the tape does not appears to have any sticky shed syndrome.

    Here's the auction: www.ebay.com/itm/112002437784

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •