Announcement

Collapse

Forum etiquette

Our mission ...

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.


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.


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.



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.


"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.

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.
See more
See less

New Apple-1 Mimeo boards available

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    New Apple-1 Mimeo boards available

    Well I received the run of Mimeo boards. I also have Cassette Boards and now have compatible Proms available.

    You can check them out on my website, look under the "Mimeo Reproduction” menu item

    http://myapplecomputer.net/mimeo-reproduction.html

    If you wish to place an order let me know.

    Cheers,
    Corey


    #2
    Oh, how I wish I could afford a fully populated one...
    Apple ][+ through Retina MacBook Pro, 5150 PC through Core i7 8870/GeForce GTX 1080Ti and quad Itanium 9150M, and many in between.
    Newton, Palm 1000, Palm V, N-Gage, Tapwave Zodiac, iPhone, iPhone X.
    Intellivision, Game Boy through 3DS, Wii, XBone

    Comment


      #3
      Looks really nice!

      Where are you getting the PROMs? I had a devil of a time sourcing PROMs for my mimeo, and I recall a similar hassle when I repaired an Asteroids Deluxe almost 15 years ago. They can't be getting easier to find. Actually it's not hard to find electrically compatible PROMS, but most of them don't have a programming algorithm on modern (or even older) programmers, and the protocols are proprietary. The NS and compatible versions, which had a published algorithm and are widely supported, are particularly hard to find.
      OSI Forum and Archive at https://osiweb.org

      Unified Retro Keyboard Project on Github

      Comment


        #4
        Actually the hardest issue with PROMs was getting g blank ones. A few lots were not blank that said they were. You have to pay a premium to get guaranteed blank ones. Compatible programmers like the Data IO 29B aren't cheap which is why I knew I needed to offer the PROMs and not just PCBs.

        Cheers,
        Corey
        Last edited by Corey986; December 18, 2016, 08:59 PM.

        Comment


          #5
          Apple 1 compatible PROMs are definately getting a bit harder to find. I bought a Data I/O 29B with the correct programming pack some years ago for something like $125. That solved the programming issue. Having it on hand, came in handy for some other vintage parts, as well. I'm not sure how much a working 29B costs these days, but I consider it an essential tool for a vintage computer buff.

          regards,
          Mike Willegal

          Comment


            #6
            I think I bought my Data IO a little over 2 years ago for an Apple-1 restoration. The Apple-1 didn't have the original PROMs and it booted to monitor with a spare set so I wanted to know what was on the PROMs. I also figured in the future I'd want to be able to create my own. I know I paid a lot more than $125 for mine. Until the taking over the Mimeos from Mike, I've maybe used it 10 times. I have a small modern programmer which handles everything from a 2708 and up. Now if you asked me about my 1702A programmer that one has had a lot
            of use.

            Cheers,
            Corey

            Comment


              #7
              Nice work Corey


              I have a few 29B's for sale in the UK

              Comment


                #8
                I had similar problems in the past. A long time ago, when I was repairing the Asteroids Deluxe, I was surprised to find 82S129 PROMs on the rack at Fry's. Too good to be true, they were not blank.

                Although not many modern programmers can program the 6301, there are pin-compatible and read-compatible parts (DM74S287, AM27S11, 82S129) than can be programmed by modern programmers. Those PROMs are actually easier to get than the 6301, but still very hard to find functioning and blank.

                Do you have actual 6301 PROMs?

                At any rate, if anyone has a lead on a reliable supplier of these PROMs, I'd be interested to see you post it here.
                OSI Forum and Archive at https://osiweb.org

                Unified Retro Keyboard Project on Github

                Comment


                  #9
                  The supply of true 6301 PROMs that are still blank seems to have dried up a few years back.

                  regards,
                  Mike Willegal

                  Comment


                    #10
                    Everytime I get a set of MMI branded PROMs these days they aren't blank. I have to send them back or sometimes I have to eat the cost so I've given up. I have a few other brand ceramic compatible PROMs which are good for re-logo'ing and when those run out I have plastic compatible ones. I will always be on the lookout for a good ceramic chip supplier, but I also need to make sure the chips are blank and compatible with the Data IO. Those comparibly inexpensive Tesla chips from Bulgaria won't work.

                    Cheers,
                    Corey

                    Comment


                      #11
                      Corey, can you PM me a price for a set of PROM's that have been re-logoed please, I have Mikes ones with Stickers and I would prefer the right look

                      Comment


                        #12
                        Originally posted by Clint View Post
                        Corey, can you PM me a price for a set of PROM's that have been re-logoed please, I have Mikes ones with Stickers and I would prefer the right look
                        Clint brings up a good question and so let me be clear before I get a ton of emails.

                        I don't plan on providing or selling re-logo'd PROMs. Other people have written up on Applefritter how to use white silk screen PCB transfer stuff to recreate the logo. I haven't tried that yet. I understand it doesn't survive cleaning with alcohol. I have done re-logo'd proms in the past using a home built press, stamper and epoxy paint which survives everything including paint thinner. It is a giant pain in the butt to setup the press and if everything is not perfect (about 1/2 the time) you have to wet sand the epoxy off like the original paint required and start again.

                        I guess when things calm down after the winter, I feel like a taxi driver to my kids who seem to have activities every day of the week in December and January, I'll try the PCB transfer technique and if it works out I may offer it. I don't expect to offer the epoxy paint ones since they can take up to a day to make a good set of 4 PROMs. I can describe the process in detail in another thread if anyone is interested in trying that. I practiced on junk ceramic chips first before I did the real thing.

                        Cheers,
                        Corey

                        Comment

                        Working...
                        X