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What's so special about Z80? - Page 4 — Parallax Forums

What's so special about Z80?

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  • msrobots wrote: »
    It is called a host header.

    like www.xxx.net or mail.xxx.net

    There are 2 ways to handle this in the DNS system.

    One way is to specify a different IP for the name.

    One way is to send all requests to the same IP and let the webserver sort it out.

    In that case you have to specify something like *.xxx.net in the DNS.

    Then you can, without changing DNS records simply add a new website by telling your server to bind to the new host header.

    in case of drwhotimelord.dnsalias.net not getting resolved I think they did something wrong there.

    maybe drwhotimelord needs to be spelled differently?

    dnsalias.net sounds like someone knowing how to do DNS entries, but you never know.

    Enjoy!

    Mike


    Mike? Excellent interpretation. I've e-mailed a friend who's not associated with what we do. Sometime this weekend he'll visit my site and see if he can reach it.....

    However.... I still do not know why there are problems.

    Oddly enough one of our own did indeed have a problem early on. Its our friend from EME.

    So let's see what happens during the rest of the weekend.

    Incidentally it was setup for me by the folks at http://dyn.com/dns/ so they are at fault here. Not me.
  • As I have to say at work a lot of time, it does not matter at all who's fault it is. It just has to be located and fixed.

    Mike
  • Heater.Heater. Posts: 21,230
    But what's with the sneaky empty page with noting but a frame in it?
  • Does anyone have a data sheet on a Mostek MK5002N, BCD to 7 segment decoder driver, the internet has proven a big runaround, either they have you over a barrel on price, or by the time you get to a PDF download, the part # has changed on you.
  • Is this it?

    http://www.datasheetarchive.com/dlmain/Databooks-2/Book271-16.pdf

    Looks like page 10 of the data sheet is out of order.
  • Heater. wrote: »
    But what's with the sneaky empty page with noting but a frame in it?

    You've got me.
    I don't know.
  • RDL2004 wrote: »
    Is this it?

    http://www.datasheetarchive.com/dlmain/Databooks-2/Book271-16.pdf

    Looks like page 10 of the data sheet is out of order.



    Thank You, I don't want to pay for something that should be public domain, who are the people selling data sheets? Former employees of now defunct companies.

    Thanks again,

    _mike
  • Heater.Heater. Posts: 21,230
    Nothing is public domain.

    Try it yourself. Write and publish a document. You automatically have copyright protection for it for the rest of your life plus a thousand years (or whatever crazy number it is now a days).

    Get back to us when you have found a way to shake off that copyright and make it public domain.

    The best you can do is publish with licence terms that let people do what they like. That is why we have the GPL, MIT, Creative Commons and all kind of other tortuous licence agreements attached to software and written works.

    So, all those datasheets are copyright whoever published them. That copyright may have been transferred to others. It certainly has not expired.

    Like you I suspect such transfer has never happened but those sharks want to gouge us for copies of their copies. I suspect that most of that activity is technically illegal. But the original creators don't care, they have moved on to other things.

  • I'm not sure why you had so much hassle, I just googled the part number and got the data sheet from the first hit. I did see a shopping cart icon that said "ordering", so I guess they'd be happy to sell you a printed hard copy. However, the link to download the pdf file was right next to it.
  • I do most of my internet from a cell phone, I guess I'm not seeing everything I'm looking at.
  • I found a site that must have had a Holliday giveaway, I managed to get twenty of NS's datasheets on their 7400N series before someone caught on.

  • Data sheets for 7400 series chips are easy to find just about anywhere. A few years back, I got TI to send me a whole book full of them for just 10 cents (including FedEx shipping).


    TTLdatabook.jpg
  • I thought I had a find, sure simpler your way, I only have a handful or two of the chips, but was trying to cover all the 7400s, pretty rugged chips for being 40+ year's old.
  • RDL2004 wrote: »
    Data sheets for 7400 series chips are easy to find just about anywhere. A few years back, I got TI to send me a whole book full of them for just 10 cents (including FedEx shipping).

    TTLdatabook.jpg

    Yes, somewhere in time I wanted to build my own Z80 system from scratch. Fascinated by TTL chips I got myself a book like that. Could get lost in it for days.

    Sadly I never got my Z80 system running.

    Enjoy!

    Mike

  • RDL2004 wrote: »
    Data sheets for 7400 series chips are easy to find just about anywhere. A few years back, I got TI to send me a whole book full of them for just 10 cents (including FedEx shipping).


    TTLdatabook.jpg

    Strange. Looks like mine except for the year. They kept insisting that the 87 one was the last one published. Annoying.
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