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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
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To put things in engineering terms, we value a high signal to noise ratio. Coming here should not be a waste of time.
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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:
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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.


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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.
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"upgraded" IBM AT...

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    "upgraded" IBM AT...

    I don't know...human resourcefulness has no limits, but this required a lot of talent

    https://www.ebay.com/itm/IBM-AT-5170...S!-1:rk:2:pf:0

    Special attention to full size FDD in half size position
    IBM PC 5150(A): IBM PC 5150(B): IBM PC 5160 (64-256k): IBM PC 5160 (256-640k): IBM PC 5170 (099): IBM PC 5170 (319/339): IBM PC 5140: IBM PC 5162: IBM PC 5155: IBM PC Expansion Unit 5161:
    WANTED!: IBM 5175 monitor, IBM 5145 monitor, IBM PC/XT/AT rear screws, Intel INBOARD 386AT card, IBM 5140 keyboard, very early IBM PC (S/N: under 5000)
    My IBM PC hardware collection

    #2
    Does the 486 reside on the main board?

    Comment


      #3
      Originally posted by 2icebitn View Post
      Does the 486 reside on the main board?
      Where on earth else would it be?
      [Need something to waste time on? Click here to visit my YouTube channel CelGenStudios]
      --------------------------------------------------------------------------------------------
      [No time for videos? Click here to visit my Twitter feed @CelGenStudios]

      = Excellent space heater

      Comment


        #4
        A plug in card. As in a coprocessor. I can't tell for sure.

        Comment


          #5
          Wow, what a terrible AT

          Comment


            #6
            This looks more like a hack job than a "skilled upgrade"!

            Comment


              #7
              The power supply made me literally laugh out loud.

              I'm also trying to figure out why the 5" floppy drive has a "720k" label on it. Quad density, or wishful thinking?

              Comment


                #8
                Why handwrite "Foxconn?"

                Again, blatantly dishonest. Couldn't power on, or wouldn't power on? Why bother lying? Either say you were too lazy to try it, or admit that it just doesn't work.
                Be polite and I may let you live.

                https://www.youtube.com/playlist?lis...5NBVfKX5471R9U

                Comment


                  #9
                  Originally posted by KC9UDX View Post
                  Why handwrite "Foxconn?"
                  LOL!!!!!!

                  Originally posted by KC9UDX View Post
                  Again, blatantly dishonest. Couldn't power on, or wouldn't power on? Why bother lying? Either say you were too lazy to try it, or admit that it just doesn't work.
                  Strange that it must have been somewhat recently used with the CF card and such. Like the guy didn't know to hook that other wire to the switch to power up. BS. That thing should be pulled behind the shed and shot.
                  I have a Major in Post-Apocalyptic Economics.
                  Wanted: Any PC-Compatible Reciprocation Dingle Arm

                  Comment


                    #10
                    I'm pretty sure every society has these:

                    https://en.wikipedia.org/wiki/Butcher

                    This is proof.
                    "Good engineers keep thick authoritative books on their shelf. Not for their own reference, but to throw at people who ask stupid questions; hoping a small fragment of knowledge will osmotically transfer with each cranial impact." - Me

                    Comment


                      #11
                      Originally posted by eeguru View Post
                      I'm pretty sure every society has these:

                      https://en.wikipedia.org/wiki/Butcher

                      This is proof.
                      Exactly. Why go through all that work? Probably would look and work better if you just screwed the motherboard on a piece of plywood. They have that hunk of "foxconn" cardboard acting as a shim and an insulator.
                      I have a Major in Post-Apocalyptic Economics.
                      Wanted: Any PC-Compatible Reciprocation Dingle Arm

                      Comment


                        #12
                        Man, this thing just gets worse the longer you look at it. It's a gift that keeps on giving.
                        General Failure Reading Drive C -
                        Abort, Retry, Ignore?

                        Comment


                          #13
                          I messaged the seller, pointing out it was not an IBM AT, just a case with a badly jammed in "upgrade"

                          Offered them $50 cash and a local pickup for it. We'll see what happens...

                          IBM 5160 - 360k, 1.44Mb Floppies, NEC V20, 8087-3, 45MB MFM Hard Drive, Vega 7 Graphics, IBM 5154 Monitor running MS-DOS 5.00
                          IBM PCJr Model 48360 640kb RAM, NEC V20,, jrIDE Side Cart, 360kb Floppy drives running MS-DOS 5.00
                          Evergreen Am5x86-133 64Mb Ram, 8gb HDD, SB16 in a modified ATX case running IBM PC-DOS 7.10

                          Comment


                            #14
                            People did upgrade their old AT's back then. My boss in the 90's gutted his original Compaq 386 at work and put a 486 then Pentium into it. We used to go to the Russian owned computer stores around Cleveland with the company credit card and buy whatever motherboards, chips, video cards etc we needed for upgrades because new machines needed approval from the bean counter accountant but upgrades didn't.
                            What I collect: 68K/Early PPC Mac, DOS/Win 3.1 era machines, Amiga/ST, C64/128
                            Nubus/ISA/VLB/MCA/EISA cards of all types
                            Boxed apps and games for the above systems
                            Analog video capture cards/software and complete systems

                            Comment


                              #15
                              I sent them a message and got this back:

                              Rica will be closed on Saturday 12/29/2018 and remain closed till Tuesday 12/01/2019 in observance of New Years. We will resume normal business hours on Wednesday 12/02/2019.


                              So I guess I'll get an answer around this time next year... LOL.

                              IBM 5160 - 360k, 1.44Mb Floppies, NEC V20, 8087-3, 45MB MFM Hard Drive, Vega 7 Graphics, IBM 5154 Monitor running MS-DOS 5.00
                              IBM PCJr Model 48360 640kb RAM, NEC V20,, jrIDE Side Cart, 360kb Floppy drives running MS-DOS 5.00
                              Evergreen Am5x86-133 64Mb Ram, 8gb HDD, SB16 in a modified ATX case running IBM PC-DOS 7.10

                              Comment

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