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This forum is part of our mission to promote the preservation of vintage computers through education and outreach. (In real life we also run events and have a museum.) We encourage you to join us, participate, share your knowledge, and enjoy.

This forum has been around in this format for over 15 years. These rules and guidelines help us maintain a healthy and active community, and we moderate the forum to keep things on track. Please familiarize yourself with these rules and guidelines.


Rule 1: Remain civil and respectful

There are several hundred people who actively participate here. People come from all different backgrounds and will have different ways of seeing things. You will not agree with everything you read here. Back-and-forth discussions are fine but do not cross the line into rude or disrespectful behavior.

Conduct yourself as you would at any other place where people come together in person to discuss their hobby. If you wouldn't say something to somebody in person, then you probably should not be writing it here.

This should be obvious but, just in case: profanity, threats, slurs against any group (sexual, racial, gender, etc.) will not be tolerated.


Rule 2: Stay close to the original topic being discussed
  • If you are starting a new thread choose a reasonable sub-forum to start your thread. (If you choose incorrectly don't worry, we can fix that.)
  • If you are responding to a thread, stay on topic - the original poster was trying to achieve something. You can always start a new thread instead of potentially "hijacking" an existing thread.



Rule 3: Contribute something meaningful

To put things in engineering terms, we value a high signal to noise ratio. Coming here should not be a waste of time.
  • This is not a chat room. If you are taking less than 30 seconds to make a post then you are probably doing something wrong. A post should be on topic, clear, and contribute something meaningful to the discussion. If people read your posts and feel that their time as been wasted, they will stop reading your posts. Worse yet, they will stop visiting and we'll lose their experience and contributions.
  • Do not bump threads.
  • Do not "necro-post" unless you are following up to a specific person on a specific thread. And even then, that person may have moved on. Just start a new thread for your related topic.
  • Use the Private Message system for posts that are targeted at a specific person.


Rule 4: "PM Sent!" messages (or, how to use the Private Message system)

This forum has a private message feature that we want people to use for messages that are not of general interest to other members.

In short, if you are going to reply to a thread and that reply is targeted to a specific individual and not of interest to anybody else (either now or in the future) then send a private message instead.

Here are some obvious examples of when you should not reply to a thread and use the PM system instead:
  • "PM Sent!": Do not tell the rest of us that you sent a PM ... the forum software will tell the other person that they have a PM waiting.
  • "How much is shipping to ....": This is a very specific and directed question that is not of interest to anybody else.


Why do we have this policy? Sending a "PM Sent!" type message basically wastes everybody else's time by making them having to scroll past a post in a thread that looks to be updated, when the update is not meaningful. And the person you are sending the PM to will be notified by the forum software that they have a message waiting for them. Look up at the top near the right edge where it says 'Notifications' ... if you have a PM waiting, it will tell you there.

Rule 5: Copyright and other legal issues

We are here to discuss vintage computing, so discussing software, books, and other intellectual property that is on-topic is fine. We don't want people using these forums to discuss or enable copyright violations or other things that are against the law; whether you agree with the law or not is irrelevant. Do not use our resources for something that is legally or morally questionable.

Our discussions here generally fall under "fair use." Telling people how to pirate a software title is an example of something that is not allowable here.


Reporting problematic posts

If you see spam, a wildly off-topic post, or something abusive or illegal please report the thread by clicking on the "Report Post" icon. (It looks like an exclamation point in a triangle and it is available under every post.) This send a notification to all of the moderators, so somebody will see it and deal with it.

If you are unsure you may consider sending a private message to a moderator instead.


New user moderation

New users are directly moderated so that we can weed spammers out early. This means that for your first 10 posts you will have some delay before they are seen. We understand this can be disruptive to the flow of conversation and we try to keep up with our new user moderation duties to avoid undue inconvenience. Please do not make duplicate posts, extra posts to bump your post count, or ask the moderators to expedite this process; 10 moderated posts will go by quickly.

New users also have a smaller personal message inbox limit and are rate limited when sending PMs to other users.


Other suggestions
  • Use Google, books, or other definitive sources. There is a lot of information out there.
  • Don't make people guess at what you are trying to say; we are not mind readers. Be clear and concise.
  • Spelling and grammar are not rated, but they do make a post easier to read.
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Compaq SLT 386's 20

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  • Chromedome45
    replied
    A little off topic but what kind of power adpater does this require? Need to know voltage and current also the Hard drive is it a standard laptop 44 pin IDE? or some proprietary type?

    Leave a comment:


  • Paralel
    replied
    I can't imagine who thought using that chip was a good design idea in the first place...

    Leave a comment:


  • Godzilla
    replied
    Does anyone know where to find the cable between power supply and computer? Mine is lost. Or if you could just let me know what sort of connector you think it uses ... looks a little like RJ45 both ends.

    Leave a comment:


  • QuantumII
    replied
    Originally posted by MikeS View Post
    ---------
    And it now has a replaceable battery; I've done a couple and yeah, you can finish it in the time it'd take to order a replacement.

    m
    Hear hear

    Leave a comment:


  • MikeS
    replied
    Originally posted by QuantumII View Post
    Yes, but then I would need to order them, and wait 1 week for them to arrive etc etc. The chip-hack is an instant fix, and brings the PC back to life after 30 minutes of work
    ---------
    And it now has a replaceable battery; I've done a couple and yeah, you can finish it in the time it'd take to order a replacement.

    m

    Leave a comment:


  • modem7
    replied
    Ds12887

    Originally posted by tezza View Post
    Really? I didn't realise you could buy compatible ICs for it. That's good to know.
    Whilst the DS12887 has been confirmed as a suitable replacement for the DS1287 in the Compaq SLT/286, be aware that in some computers, the DS12887 is not a suitable replacement for the DS1287.

    For example, Maxim (Maxim purchased Dallas Seminconductor in 2001) state at: http://www.maxim-ic.com/appnotes.cfm/appnote_number/503
    "The DS1287 is obsolete. In many cases, a DS12887 will replace it. However, on some systems, the BIOS or chip set will access the wrong address partition in the DS12887. In those cases, the system will not work."

    An earlier thread 'explores' the issue of DS1287 replacement: http://www.vintage-computer.com/vcfo...ghlight=Ds1287

    Leave a comment:


  • tezza
    replied
    Originally posted by Druid6900 View Post
    I can't see going to all that trouble when you can get DS12887s for about 6 bucks each and just pop them in.

    They've worked in every single IBM, Commodore and a few 486 mobos that I've put them in.
    Really? I didn't realise you could buy compatible ICs for it. That's good to know.

    Still, with shipping costs the way they are $6 becomes $26 and a 2-6 week wait. Add that to our weak currency vrs the US dollar, I might just put up with the problem in the meantime.

    Tez

    Leave a comment:


  • QuantumII
    replied
    Originally posted by Druid6900 View Post
    I can't see going to all that trouble when you can get DS12887s for about 6 bucks each and just pop them in.

    They've worked in every single IBM, Commodore and a few 486 mobos that I've put them in.
    Yes, but then I would need to order them, and wait 1 week for them to arrive etc etc. The chip-hack is an instant fix, and brings the PC back to life after 30 minutes of work

    Leave a comment:


  • Druid6900
    replied
    I can't see going to all that trouble when you can get DS12887s for about 6 bucks each and just pop them in.

    They've worked in every single IBM, Commodore and a few 486 mobos that I've put them in.

    Leave a comment:


  • tezza
    replied
    Well done on that. It looks like an intricate procedure.

    I'd probably try it if mine couldn't boot. After all, if the thing doesn't work anyway, you have nothing to lose, right?

    Mine does recognise the HD ok, although I might pluck up the courage to try modifying the battery chip one day. The machine doesn't recognise the floppy drive and I'm sure that's because the CMOS setting defaults to a 720k drive rather than the 1.44 that's installed. In the meantime I just use MS-DOS 5.0 INTERSRV to get files into the machine.

    Tez

    Originally posted by QuantumII View Post
    I successfully did this fix on my SLT/286 some months back. It works just fine, and the hack can be done with a sharp knife instead of a dremel, so that you can cut away little by little of the plastic.

    I could not boot from the HDD unless I had the chip fixed, so that's why I did it.

    Leave a comment:


  • QuantumII
    replied
    Originally posted by tezza View Post
    Well done on tackling the issue and suceeding Gabe. I have the same problem in my Compaq SLT/286. I read those instructions on how to cut open the chip and add a piggy-back battery some time ago and it scared the hell out of me

    The machine boots just fine, so I just live with the error codes.


    Tez
    I successfully did this fix on my SLT/286 some months back. It works just fine, and the hack can be done with a sharp knife instead of a dremel, so that you can cut away little by little of the plastic.

    I could not boot from the HDD unless I had the chip fixed, so that's why I did it.

    Leave a comment:


  • frozenfire75i
    replied
    Well, I got the back plate off where the ports were. Saw the metal cage but could not get the metal cage out, even after takeing the screen lose and keyboard cable! It had a bad main battery too.

    Leave a comment:


  • tezza
    replied
    Originally posted by Unknown_K View Post

    The problem with mail order places that sell Dallas chips is they screw you on shipping or have a minimum purchase or $20 or more.
    Yes, I found opening the case no problem once I had the right screwdrivers. The shipping costs to NZ though, is one of the reasons I'm just gonna live with the problem.

    Tez

    Leave a comment:


  • Unknown_K
    replied
    You can get cheap torx screwdrivers/bits from harborfreight or whatever that tool place is called ($10 a set is what I paid for a set that I needed to work on my mac wallstreets).

    The problem with mail order places that sell Dallas chips is they screw you on shipping or have a minimum purchase or $20 or more.

    Leave a comment:


  • langelgjm
    replied
    Oh well... yeah, there are about a million torx screws you have to undo to get into the system

    Leave a comment:

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