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

Commodore PC 30 III Hard disk settings ?

  • Filter
  • Time
  • Show
Clear All
new posts

    Commodore PC 30 III Hard disk settings ?


    have acquired a Commodore PC30 II (Actually contains a Commodore PC40 III mainboard) and removed the slightly leaking CMOS backup batteries before powering up. Of course now they are removed (replacements on the way) I have lost all the settings including the hard drive config. I appear to have Commodore BIOS version 2.0 on this Machine.

    Anyone know what the settings should be for a WD 93028 A (20 MB) drive please ?
    Of course I have found CHS settings online (782/2/27) but none of these are configurable with this machine - it would appear to only support one of 46 predefined types with seemingly no way to manually enter these settings.

    Note that the hard drive was not spinning up on first try and so I had to rotate the spindle by hand to free it up.
    It now spins up and I can see the head stepper moving during self test and attempts to read from the drive - its quite possible the drive is dead in some other way but I'd like to try and find appropriate settings in order to test. I don't currently have another working machine to try the drive in.

    Last edited by zippysticks; June 13, 2018, 11:51 AM.

    Try (782/2/27)

    Edit: Nevermind, you said you can't edit the settings, but those are the proper numbers.

    Second edit: I see you edited the 1s out. Ok.

    It's a long shot, but you could compare notes regardless. This guy over at recently acquired a PC30-III and might be able to help if you PM him. Just a thought.
    Last edited by liqmat; June 13, 2018, 11:55 AM.


      Thanks - I did actually find it in the BIOS table as type 31 - noticed I had to use pgup/pgdwn to scroll through the table - doh !
      Either way, although the drive now spins up and the machine attempts to move the heads during detection it is still failing. Not sure what else I can do with this drive. Looks like I'll need another old drive drive or modern ISA flash alternative.


        I have some drives between 120 MB and 250 MB if that's what you're looking for.
        PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step


          Originally posted by zippysticks View Post
          Looks like I'll need another old drive drive or modern ISA flash alternative.
          May I suggest to have a look at this page of mine: It enables you to use almost any modern big IDE drive. One catch: what ever big HDD you use, the Universal BIOS will limit it to 8 GB. But compared to the 512 MB you have now that shouldn't be a problem, I think
          FYI: I use a Seagate 20 GB.
          Last edited by Ruud; June 13, 2018, 11:26 PM.
          With kind regards / met vriendelijke groet, Ruud Baltissen


            Thanks for the kind offer - I have managed to source a couple locally in the UK.


              That is really useful - thanks. I'll take a look at my board this weekend and see if this can be applied.

              Originally posted by Ruud View Post
              May I suggest to have a look at this page of mine: It enables you to use almost any modern big IDE drive. One catch: what ever big HDD you use, the Universal BIOS will limit it to 8 GB. But compared to the 512 MB you have now that shouldn't be a problem, I think
              FYI: I use a Seagate 20 GB.


                Originally posted by Ruud View Post
                One catch: what ever big HDD you use, the Universal BIOS will limit it to 8 GB.
                Actually, that's a limitation of DOS, not the XTIDE Universal BIOS. XUB supports LBA48 which means it can handle drives with 2^48 sectors, or 144 115 188 075 855 872 bytes or 131 072 terabytes. Obviously this is not tested since no existing drive is anywhere near this limit.
                Looking for a cache card for the "ICL ErgoPRO C4/66d V"


                  Originally posted by Krille View Post
                  no existing drive is anywhere near this limit.
                  It's just a matter of time lol