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  1. Remember that BIOS sets up the DMA controller,...

    Remember that BIOS sets up the DMA controller, which is used for DRAM refreshing. That means there is a path for a bad BIOS to wreak havoc with the memory subsystem.
  2. I'll point out that everything Trixter said above...

    I'll point out that everything Trixter said above is also in the PDF documentation for mTCP ...
  3. How did you get the executables onto your system?...

    How did you get the executables onto your system? Did you FTP them somewhere and forget to set binary mode? What you are describing sounds like the binary is corrupted or the machine is very ill.
    ...
  4. The last line doesn't have a carriage return and...

    The last line doesn't have a carriage return and line feed pair. Add a blank line or two at the end of the file.
  5. I'm absolutely certain this is going to be a user...

    I'm absolutely certain this is going to be a user error, but the intent here is to help you get past it.

    Can you move the file to a machine, zip it, and then email it to me? Or use a hex editor...
  6. VCF East and VCF Berlin - this weekend!

    This weekend enjoy two different VCF events!


    http://vcfed.org/wp/wp-content/themes/vcf/images/vcf-logo_125x125.png

    VCF East (our flagship event!) will take place on Saturday and Sunday...
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    Rules/Guidelines for the Off Topic area

    We have an off-topic area for discussion of newer machines and tech that are not vintage. There is also a quite a bit of very off-topic chatter, and we acknowledge and allow it because this is a...
  8. ANSI color codes and cursor positioning make...

    ANSI color codes and cursor positioning make sense, but setting the graphics modes was just done for completeness, and it was a mistake.

    Once in one of the color modes you can't draw lines or...
  9. Repeat business is always a positive thing ... ...

    Repeat business is always a positive thing ... it also confirms that I haven't screwed up the previous order. ;-)

    I'm glad you are enjoying them!
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    Hi Ted, I'm a big fan of your work. The price...

    Hi Ted,

    I'm a big fan of your work. The price is right for such a unique design and I'd take one. But it's basically for giggles ... I have 486 and Pentium machines around. A super fast PCjr...
  11. We ran out of t-shirts again, so we ordered...

    We ran out of t-shirts again, so we ordered another 100! However, this will be the last batch ... it's been fun but it's a lot of work.

    If you have been waiting for the right size or color now...
  12. Do you have a mechanism for explicitly setting...

    Do you have a mechanism for explicitly setting the I/O ports and IRQs to be used with these programs?

    I ask because on a PCjr if you use COM1 and COM2 that can lead to problems because the PCjr...
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    The ROM can not be ready by the software on the...

    The ROM can not be ready by the software on the system - it's not wired to anything except the Motorola video controller. However, and identical bitmap exists in memory. And any EPROM programmer...
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    Newer drivers are not available. The version you...

    Newer drivers are not available. The version you found works well.
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    So all you need is a couple hundred dollars to...

    So all you need is a couple hundred dollars to get started, and you can buy everything you need on Aliexpress?

    I used to write hard drive firmware at a major manufacturer. On my work bench in the...
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    (Already answered on my PCjr forum a few days ago...

    (Already answered on my PCjr forum a few days ago but repeating it here ...)

    It is a socketed chip between the keyboard infra-red sensor and the modem slot.

    I recommended reseating the ROM chip...
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    The moderation queue is generally checked at...

    The moderation queue is generally checked at least once per day. Sometimes it gets missed by all of us. Please be patient, and after your 10th post you are no longer subject to the moderation queue.
  18. Int 21 57 is not going to care if you are...

    Int 21 57 is not going to care if you are pointing at a directory vs. a file. Just is it for both object types.
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    Please avoid editorializing about the topic. ...

    Please avoid editorializing about the topic. Unless you are an expert in the field the harsh criticism is probably unwarranted.
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    I noticed Stone's absence a few weeks ago. As...

    I noticed Stone's absence a few weeks ago.

    As always, everybody should remain civil regardless of your personal opinion.
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    The PCjr does very much have a ROM for the...

    The PCjr does very much have a ROM for the character generator. It's basically the same as a CGA card, but with some more graphics modes, circuitry for sharing the memory with the main system, and...
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    I looked at wired cameras using power over...

    I looked at wired cameras using power over Ethernet and "smart" cameras that transmit on WiFi but use wired power. I went with Nest cameras, which generally have the features I want. Their cloud...
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    I'm still confused by the original post in this...

    I'm still confused by the original post in this thread. It's not even plausible based on the timeline.
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    Nothing adds up: I have owned an original...

    Nothing adds up:


    I have owned an original 6Mhz IBM AT for 30 years. I've never seen "AT Multiuser System" anywhere before I read this post.
    The meeting between Killdall and IBM was in 1980....
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    Or a low spec PC running an older version of...

    Or a low spec PC running an older version of Linux ... that is more than capable of serving as a Token Ring-Ethernet gateway.
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