Forum Rules and Etiquette

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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.

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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.

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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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New user moderation

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Cassette emulator for the IBM 5150

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    Cassette emulator for the IBM 5150

    At this moment there are two threads handling the cassette port of the IBM 5150. Having various Commodores I'm more than familiar with the cassette except.... I hardly use them because I use the Cassiopei cassette emulator.
    Having a 5150 and reading those threads I got curious if there is a cassette emulator for the 5150. Using Google I found nothing but it can be that I used the wrong keywords.

    Of course I gave it a thought myself. The input and output line of the Commodore cassette port are TTL level and that made it quite easy to hook it up to, for example, the LPT port of a PC. In case of the 5150 it is more obvious to the microphone inlet and the headphone outlet of a modern PC.

    My main question: is there any cassette emulator around for the 5150?

    Thank you in advance for any information!
    With kind regards / met vriendelijke groet, Ruud Baltissen

    Maybe I misunderstand, but since the 5150 uses audio input directly, you can even use an old iPod or your phone to feed data into the tape port. It's just a matter of playing the WAV file of the tape. Nothing to emulate, unlike with the Commodore stuff.


      OK, but then what about saving files? That is something you cannot do with an iPod AFAIK.
      With kind regards / met vriendelijke groet, Ruud Baltissen


        Not tested myself, but pretty sure something like this:

        would work fine. Has audio in and out as well as an USB port and microSD slot.


          The idea is good but you would need one that also can handle an external microphone. And it seems Sony has them as well. Something to think about....
          With kind regards / met vriendelijke groet, Ruud Baltissen


            The linked one has a jack for an external mic.


              A working remote jack would be important for true emulation. It's needed for seamless loading of machine code with a BASIC loader stub


                Well, how many tape recorders back then had a remote port? Probably not many. It's not required, unless the PC would absolutely need to pause and resume playback of the tape on its own with no way to do it manually by the user.


                  The vast majority of them did have it. Is it "required"? No, but it makes it much easier and is how the system was intended to be used.


                    Originally posted by Timo W. View Post
                    Well, how many tape recorders back then had a remote port? Probably not many.
                    Practically every plain-jane standard "shoebox" cassette recorder:

                    Had one. See how that microphone has a switch on it to start and stop the recording? Those things were immensely common. So that's why most home computer cassette systems that used generic recorders assumed they could control the deck.
                    My Retro-computing YouTube Channel (updates... eventually?): Paleozoic PCs Also: Blogspot


                      Some of the tape emulators like the TZXDuino have support for a remote jack. Since those can play WAVs and there is IBM PC cassette to TZX conversion software, just about any of them could be repurposed for the IBM PC. Not much reason to convert to the more efficient TZX format since the complete selection of all cassette software able to run on anything resembling the IBM PC needs less than 500 MB for uncompressed WAV files. The entire cassette library of games and applications for the Soviet Poisk PC clone uses about 250 MB when stored as WAVs. There won't be any high speed turbo loading mode since no one has written high speed cassette routines for the IBM PC.


                        TzxDuino, a keyword that lead to TzxDuino - Reloaded. That's what I was looking for. Thank you!
                        With kind regards / met vriendelijke groet, Ruud Baltissen