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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
  • 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.
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WTT: Sergey ISA SVGA for Comparable ISA Video Adapter

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    #16
    Hi Stone!

    I ran into that information while looking up the memory map information. I'd like to keep using the 1MB RAM Card because it should allow me to use free 64K blocks of high memory for loading TSRs into high RAM. I have one free 64K block at B0000 and I'm trying to free up another.

    Thanks,

    Heather

    Comment


      #17
      Can't the TSRs be loaded into the EMS supplied by the 2MB board?
      PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

      Comment


        #18
        I did figure out how to use the 2MB EMS board for high memory. Unfortunately, the Lo-Tech 2MB board only has one 64K address block and using it as high memory disables the rest of the EMS.

        Heather

        Comment


          #19
          Originally posted by SkydivinGirl View Post
          Unfortunately, the Lo-Tech 2MB board only has one 64K address block and using it as high memory disables the rest of the EMS.
          I see... I guess 'Lo-Tech' is certainly the correct description for that board. Not all EMS boards are so restrictive.
          PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

          Comment


            #20
            I've seen in other threads on the forum that many cards have two 64K blocks available to access the EMS. With that configuration, you can use one 64K block as high memory then the other 64K block handles all the access to the rest of the pages in the EMS. I didn't know much about the way the card functions before buying it. I'm able to bypass that limitation using the 1MB EMS but I do lose a slot. I have to look at it on the bright side though. I don't have to mod my motherboard to get 640K.

            Thanks for all the ideas Stone. I'm sure I'll get around the slot 8 limitation somehow. As it is, I have the CF mounted in the front bay so transferring data to the machine is as simple as plugging the card into the card reader on my modern system. Until I figure it out, I'll use the PC10-III as my 'networked' XT.

            Heather

            Comment


              #21
              Originally posted by SkydivinGirl View Post
              I don't have to mod my motherboard to get 640K.
              It's not much of a mod -- one jumper on a pad that's already there and adding a chip to a socket that's, also, already there. Sounds to me like Big Blue was just beggin' ya' to do it to their board.
              PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

              Comment


                #22
                It certainly does sound like Big Blue wanted you to mod it if it's that easy! I just may have to try it.

                Heather

                Comment


                  #23
                  Do you have the instructions on how to do it? It's just a short text.
                  PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

                  Comment


                    #24
                    I saw the directions on the Minus Zero Degrees site. I'll try to pick up the components for the mod the next time I order parts.

                    Heather

                    Comment


                      #25
                      Originally posted by Stone View Post
                      FWIW, if you have the 64K - 256K board it can be very easily rigged to be a 640K board. That might free up Slot 5.
                      Originally posted by SkydivinGirl View Post
                      Hi Stone!

                      I ran into that information while looking up the memory map information. I'd like to keep using the 1MB RAM Card because it should allow me to use free 64K blocks of high memory for loading TSRs into high RAM. I have one free 64K block at B0000 and I'm trying to free up another.

                      Thanks,

                      Heather
                      You can put 1 meg on the mother board and use some of the free upper memory for UMB.

                      Originally posted by SkydivinGirl View Post
                      ...I don't have to mod my motherboard to get 640K...
                      Heather
                      This is true, but it's worthwhile. Especially if you take it up to 1 Meg.

                      Originally posted by Stone View Post
                      It's not much of a mod -- one jumper on a pad that's already there and adding a chip to a socket that's, also, already there. Sounds to me like Big Blue was just beggin' ya' to do it to their board.
                      Originally posted by SkydivinGirl View Post
                      It certainly does sound like Big Blue wanted you to mod it if it's that easy! I just may have to try it. i

                      Heather
                      Sorry, I might over using the "multi-quote" button, but you really should check out this thread. It was started by me years ago and I was able to convince Chuck(G) into figuring out how to program a GAL to make the thing work. It works very well and it's extremely cool to be able to have memory available on the mother board for UMB on top of the 640K!! I can provide some slightly simplified instructions and the JEDEC file to program the GAL. Or if you don't have an eprom programmer capable of programming a GAL16V8, I can provide a programmed chip if you would like to try this clever mod.
                      Last edited by ibmapc; March 21, 2015, 09:21 PM.

                      Comment


                        #26
                        Thanks for the link! I'll be sure to check out the thread. I don't currently have a GAL capable programmer so I may take you up on your offer.

                        Heather

                        Comment


                          #27
                          OK, just just let me know. Always glad to help.

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