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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.
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Find RAM on IBM PC

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    Find RAM on IBM PC

    How do I find out how much RAM I have in my IBM PC w/ PC-DOS 3.1?
    Wanted: Any old clunky 286-P1 machine that has some kind of working battery or replaceable with off the shelf parts. Preferred: 10+lbs 386 machines.

    #2
    Put a DOS 5.x or 6.x in and use MEM.
    PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

    Comment


      #3
      chkdsk should give you what you want.

      Comment


        #4
        Originally posted by Stone View Post
        Put a DOS 5.x or 6.x in and use MEM.
        Can't do that. Don't have 5.25" copy of anything later than 3.3, or a disk drive that could write it.
        Wanted: Any old clunky 286-P1 machine that has some kind of working battery or replaceable with off the shelf parts. Preferred: 10+lbs 386 machines.

        Comment


          #5
          Use CHKDSK as Mike said.
          It reports the total and free memory in the system (as well as checking your file system).
          Twitter / YouTube

          Comment


            #6
            Code:
            A>[B]debug[/B]
            
            -[B]a100[/B]
            2E68:0100 [B]int 12[/B]
            2E68:0102 [B]int 3[/B]
            2E68:0103
            -[B]g=100[/B]
            AX=0280  BX=0000  CX=0000  DX=0000  SP=FFFE  BP=0000  SI=0000  DI=0000
            DS=2E68  ES=2E68  SS=2E68  CS=2E68  IP=0102   NV UP EI PL NZ NA PO NC
            The value in AX is the size of memory in kilobytes (so AX=0280 means 280h, 640 decimal).

            Comment


              #7
              Does CHKDSK v3.1 actually supply memory info?
              PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

              Comment


                #8
                Originally posted by Stone View Post
                Does CHKDSK v3.1 actually supply memory info?
                Apparently so.

                http://www.os2museum.com/wp/dos/dos-...os-3-1-chkdsk/
                Thomas Byers (DRI)- "You'll have a million people using the A> [MS-DOS prompt] forever. You'll have five million using [nongraphic] menu systems such as Topview, Concurrent PC-DOS, Desq, and those types. But there'll be 50 to 100 million using the iconic-based interfaces."

                Comment


                  #9
                  I hadn't thought about that, but every time I haven't had MEM, CHKDSK has been there and given me the answer.
                  Twitter / YouTube

                  Comment


                    #10
                    CHKDSK reports 640KB. No need to upgrade this puppy!
                    Wanted: Any old clunky 286-P1 machine that has some kind of working battery or replaceable with off the shelf parts. Preferred: 10+lbs 386 machines.

                    Comment


                      #11
                      Originally posted by twistedpneumatic View Post
                      CHKDSK reports 640KB. No need to upgrade this puppy!
                      From memory (excuse the pun), PC DOS 1.1 shows the total and free memory!
                      Bobby.

                      Comment


                        #12
                        Originally posted by twistedpneumatic View Post
                        CHKDSK reports 640KB. No need to upgrade this puppy!
                        Too much for pure IBM PC. I hate waiting 50 seconds from power on to boot when 640k is fitted. From my experiences, if you have only two floppies, 256k is enough to run anything on IBM PC. If you have hard drive, 512k is enough.
                        IBM PC 5150(A): IBM PC 5150(B): IBM PC 5160 (64-256k): IBM PC 5160 (256-640k): IBM PC 5170 (099): IBM PC 5170 (319/339): IBM PC 5140: IBM PC 5162: IBM PC 5155: IBM PC Expansion Unit 5161:
                        WANTED!: IBM 5175 monitor, IBM 5145 monitor, IBM PC/XT/AT rear screws, Intel INBOARD 386AT card, IBM 5140 keyboard, very early IBM PC (S/N: under 5000)
                        My IBM PC hardware collection

                        Comment


                          #13
                          Good grief! The memory test is part of the experience!
                          Reach me: vcfblackhole _at_ protonmail dot com.

                          Comment


                            #14
                            Originally posted by Chuck(G) View Post
                            Good grief! The memory test is part of the experience!
                            You got that right!! Man, if you can't wait a few extra seconds what the heck are you doing messing around with this vintage stuff anyway?

                            Comment


                              #15
                              Time is money! :P
                              Ok seriously for what do you need 640k of RAM on IBM PC with two floppies and no hard drive?
                              IBM PC 5150(A): IBM PC 5150(B): IBM PC 5160 (64-256k): IBM PC 5160 (256-640k): IBM PC 5170 (099): IBM PC 5170 (319/339): IBM PC 5140: IBM PC 5162: IBM PC 5155: IBM PC Expansion Unit 5161:
                              WANTED!: IBM 5175 monitor, IBM 5145 monitor, IBM PC/XT/AT rear screws, Intel INBOARD 386AT card, IBM 5140 keyboard, very early IBM PC (S/N: under 5000)
                              My IBM PC hardware collection

                              Comment

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