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Type: Posts; User: Eudimorphodon

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  1. Replies
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    My vague memory is that the 5154 uses the...

    My vague memory is that the 5154 uses the polarity of one of the sync signals to decide if it's going to run in 200 or 350 line mode. (???) I'd definitely consider it a suboptimal choice for working...
  2. I don't have the original Tandy board to compare...

    I don't have the original Tandy board to compare it with, but it does definitely give me the willies how much insertion/removal force it seems to take to get boards in and out of these machines with...
  3. I haven't tested this yet because I'm currently...

    I haven't tested this yet because I'm currently not caring a lot about cross compatibility with original boards, but my ad-hoc measurements suggest that if I were to use a "double-ended" male header...
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    Never! Best movie EVAR!

    Never! Best movie EVAR!
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    Here's my thread about using USE!UMBS and DOSMAX...

    Here's my thread about using USE!UMBS and DOSMAX on my Tandy 1000.

    http://www.vcfed.org/forum/showthread.php?71371-Experiences-loading-DOS-into-upper-memory-on-an-XT-class-Tandy-1000

    DOSMAX...
  6. So it seems like I've got me a head-scratcher. I...

    So it seems like I've got me a head-scratcher. I went ahead and swapped a V-20 into the HX rig; as a result I was able to verify that ctmouse is indeed fixed by having a V-20... but Kermit wasn't....
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    "C" dates from 1969, and all subsequent revisions...

    "C" dates from 1969, and all subsequent revisions mostly just pick around the edges in terms of formalizing timing and making the standard D-shell connector an official recommendation instead of a...
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    RS-232 is bipolar, with a "1" being at least...

    RS-232 is bipolar, with a "1" being at least three volts positive (the specification says it should be 5-25v, 12v is commonly used for PC serial ports) and a zero specified as -3v (or more, again,...
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    While I'd totally buy at least one ribbon myself...

    While I'd totally buy at least one ribbon myself if the color ones were readily available (in a form likely to work) just to relive the experience I honestly have to say you're not missing much not...
  10. While working on my HX project I noticed all the...

    While working on my HX project I noticed all the weirdness hanging off the keyboard controller. Of course, to make it more fun the EX/HX technically have two chips you could call the "Keyboard...
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    The practical drive size limit for a Tandy 1000...

    The practical drive size limit for a Tandy 1000 is probably 8.4GB; the way DOS versions prior to Window 9x internally represent drive addresses (CHS) for BIOS calls is limited to that. FreeDOS may...
  12. Have you checked the schematic yet to see where...

    Have you checked the schematic yet to see where that goes? Does it just go to the audio amplifier circuitry (via a crude mixer?) to act as a remote speaker for a card, or is it more sophisticated...
  13. Oh, don't get me wrong here, I'm in no way...

    Oh, don't get me wrong here, I'm in no way ragging on the Tandy 1000. The... eccentricities, I'm running into are all part of the fun. I'm just getting amused at how the well of differences between...
  14. The SX was the first 1000 family machine to have...

    The SX was the first 1000 family machine to have the DMA controller integrated onto the motherboard. I'm guessing Tandy concluded that since they didn't need any "extra" lines to implement the DMA...
  15. Bang your skull on the ground hard enough and you...

    Bang your skull on the ground hard enough and you can move the Earth. Here it is, running on IRQ2 using the NE2000 driver.

    57320

    I did go back and double check if it would work with the...
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    Actually the curve/split is there because human...

    Actually the curve/split is there because human shoulders are wider than the letter area of a standard keyboard, which forces the arms to angle inward while the wrists crank outward so the fingertip...
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    The printer can support either XON/XOFF or...

    The printer can support either XON/XOFF or hardware handshaking, but getting the cable wiring correct for the latter seems to be nontrivial. My cobbled together cable seems to work, but the wiring...
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    There are outfits selling the same ribbon...

    There are outfits selling the same ribbon cartridges as compatible with the two printers (example). Whether the Imagewriter II has any interchangeable parts other than ribbons with any particular...
  19. Yeah, and I suppose I can't really blame them for...

    Yeah, and I suppose I can't really blame them for not bothering to check and see if the card is actually in an AT or not. It does detect if it's in an 8-bit slot, prints that out in the "Found Card:"...
  20. A thing I did discover: one company that sold...

    A thing I did discover: one company that sold these cards had multiple versions of the support software on their website. The documentation, such as it is, for PG8019.EXE is in the form of comments...
  21. I'd still like to know why RSET8019 hangs hard on...

    I'd still like to know why RSET8019 hangs hard on both my Tandy 1000s; mainly curious if it'd hang on the same machines if I had the memory card with a DMA controller (even though I wouldn't think...
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    You know, I'd never thought to check before but,...

    You know, I'd never thought to check before but, yeah, it looks like they sold a color-capable version of the M8510 labeled either a "+" or "SC" depending on... who knows, it looks like they sold a...
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    I've used the same white MS Natural since 2000. I...

    I've used the same white MS Natural since 2000. I wish it had a USB hub built into it, but other than that I plan to use it until it disintegrates into dust.
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    The Imagewriter II? Like I said, it's a C. Itoh,...

    The Imagewriter II? Like I said, it's a C. Itoh, both mechanically and *mostly* in terms of programming. My vague understanding is it may have some minor character set differences from a standard...
  25. You may have seen my other thread about getting...

    You may have seen my other thread about getting an Ethernet card for my EX, which is what triggered the question about what slot resources people are actually successfully using in their Tandy 1000s....
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