Announcement

Collapse

Forum Rules and 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.


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.
See more
See less

Arduino PS2 to XT converter

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

    #46
    Originally posted by bhtooefr View Post
    Early IBM Model Ms actually supported the XT explicitly (and IBM even sold a variant without the LEDs specifically for XTs), and they would (on the latest XT BIOS) switch to XT mode automatically.
    Very interesting, and explains why all of them -- even the clones -- still have vestiges of that in the form of the "mode 1" character set, and the original model M's "Mode 2" which was XT scancodes but with less remap and the extended 101 support.

    Mode 1 did remap and multiple keystrokes to make a 101 act like a 89.

    It would have to mostly be a keyboard side thing -- interesting they had a auto-detect of some sort (and it would require detection given the system side hardware difference) that clone makers didn't copy. On the software side it's not exactly rocket science, and it calls into question why so many clone keyboards had the switch at all.

    Well, except if you didn't have that latest ROM or were on a clone that wouldn't take it... then the mechanical switch makes sense.
    From time to time the accessibility of a website must be refreshed with the blood of owners and designers. It is its natural manure.
    CUTCODEDOWN.COM

    Comment


      #47
      Originally posted by deathshadow View Post
      I have NEVER heard of an AT keyboard working on a PC/XT regardless of BIOS unless it had a switch on it to do so. That's definitely news to me...
      Wellllll...that's what we're all here for - to help and inform each other

      https://pcpartpicker.com/b/krYrxr

      112023.391ed34afcb07a637d0d420bb302a0cf.954da5a19a003e760b8fd3a8aba6c3bc.1600.jpg

      Comment


        #48
        I was quite busy with other projects, but I'm really interested in completing this one. Did anybody get any further on this?

        Comment


          #49
          Originally posted by nc_mike View Post
          Wellllll...that's what we're all here for - to help and inform each other

          https://pcpartpicker.com/b/krYrxr

          [ATTACH=CONFIG]32976[/ATTACH]
          Wow what an amazing machine!

          Comment


            #50
            Damn! I built the adapter with a DCCDuino Arduino Nano clone and I get the double keys problem, with every possible combinations of programs listed here...
            Finally, is there something to do with it?
            I'm really hoping to find a PS2 to XT adapter

            Comment


              #51
              Hello,

              I am original author of adapter ..
              I released new version of adapter for Arduino: https://github.com/kesrut/pcxtkbd

              Which fixes many problems.. Hope you will enjoy!

              Report if you have any problems!

              www.kestutis.org

              Comment


                #52
                would this new code work on a Teensy 3.2 or will it need converted?

                Comment


                  #53
                  I made a test this afternoon (same problem as many : one old XT with monitor, but without keyboard).
                  I'll perhaps look after a real XT keyboard later but for now I've got a good PS/2 keyboard which works on my XT !

                  Thanks.

                  PS : be aware that the latest code has some changes compared to older version. Il particular, the arduino pins for the XT clock and the PS/2 clock have been inverted.
                  If you just use the schematic of the first post along with the lastest program but without inverting those pins, it won't work.

                  Comment


                    #54
                    Hi,

                    I use a PS/2 keyboard with my XT computer, with an Arduino Micro interface module (fun to use a board as interface which is much faster than the computer itself...).

                    I have suspicions on eventual crashes caused by this layout... I need further testing, but I have quite frequent hangouts of the PC, particularily when I use the french keyboard layout.
                    I'll try to stay in QWERTY and test... anyone has stability issues with this setup ? I also observed that when keypresses are very fast (mostly in games) the arduino system gets completely lost.

                    Otherwise I'll perhaps try this system : http://www.vcfed.org/forum/showthrea...oard-converter

                    It should be much more stable... but there's "logistics" problems for me as I don't own an universal programmer and I don't really want to buy one just for this little project.

                    Comment


                      #55
                      Originally posted by PePe-fr View Post
                      PS : be aware that the latest code has some changes compared to older version. Il particular, the arduino pins for the XT clock and the PS/2 clock have been inverted.
                      If you just use the schematic of the first post along with the lastest program but without inverting those pins, it won't work.
                      What do you mean with "inverted"? Do I have to place inverter gates like 74LS04 or 74LS14 between the pins of the Arduino and the connectors?
                      With kind regards / met vriendelijke groet, Ruud Baltissen

                      www.baltissen.org

                      Comment


                        #56
                        No !

                        I mean that pin 3 & 4 are inverted between the schematic and the latest arduino program.

                        Comment


                          #57
                          Originally posted by PePe-fr View Post
                          I mean that pin 3 & 4 are inverted between the schematic and the latest arduino program.
                          Ah, je comprend. En Anglais c'est "swapped".
                          I understand. In English it is "swapped" .
                          With kind regards / met vriendelijke groet, Ruud Baltissen

                          www.baltissen.org

                          Comment

                          Working...
                          X