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  1. H

    Serial port access on XT vs AT/Pentium

    Your interpretation of my jumbled, rambling, mess of glyphs, is indeed correct. This is just how I'm used to testing serial ports. I'll do it either this way, or buck those RX/TX down to 5V and use the logic analyzer. It probably sounds like I'm doing things the "hard way," but I usually have...
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    Serial port access on XT vs AT/Pentium

    Ahem.. in addition to the 8250A vs 16550A thing I encountered using Checkit 3.. I had mentioned I was trying to use some serial port code found online. I traced some weirdness happening to the COM port value being passed down a stack of nested init functions in the driver code I'm using...
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    Serial port access on XT vs AT/Pentium

    Thanks again for the reply. Looking forward to checking out the SERTEST source. I believe you're right about the suitability of Checkit 3 against fast machines or various models of UART.. Apparently there are 2 types of UART one may find in these old computers.. the older 8250A and newer...
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    Serial port access on XT vs AT/Pentium

    Thanks for your reply, modem7. Test Method The test method I am using to determine which PC setup work and which ones do not, is use of a null modem adapter between the target PC and a modern PC running either Tera Term or Realterm. Forgot to mention before that I am booting up each PC with the...
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    Serial port access on XT vs AT/Pentium

    I seem to be stuck on trying to open a serial port on AT or higher PC's.. In the test software Checkit 3 for DOS, there is a serial test that outputs some ASCII text to the COM port. Is there any reason why this serial port test in Checkit 3 would seem to work fine 2 of the XT class PCs I have...
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    A few thoughts about iOmega Zip disks/drives

    Firmly in the pro-Zip drive camp here. Probably have 6 or 7 ATAPI Zip drives installed in various machines around the place. And one external parallel Zip drive. Other than the clear plastic window on the external parallel drive breaking off, these drives have been super reliable. All but one...
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    Midwest FS: Multiple PS2XTSDs , LoTech EMS 2mb, XT-CF-Lite, Sergey 8bit ISA network card.

    Did not even realize there was a Sergey 8-bit ISA network card in existence. The Tandy 1000 SL is now getting one delivered. I was literally just thinking about an hour ago about trying to find out if one of my Etherlink III 16-bit ISA cards would work in 8-bit slot in that machine.
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    Call for ideas/fixes for the next mTCP version

    Makes sense. Figured it must be due to technical limitations, since none of the other FTP clients targeted at common 16-bit machines I've tried do the recursive get.
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    Love recapping, it just feels so relaxing and satisfying

    May I send a bunch of stuff your way for re-capping? Just kidding.. Glad at least someone likes doing it. Feels too much like work to me. Maybe because my actual day job involves lots of soldering. also making sure everyone else in manufacturing is doing it right.. Spent hours 100% re-capping...
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    Call for ideas/fixes for the next mTCP version

    Downloading entire folders in one go with the FTP command, recursively. I am posting this suggestion at the risk of being told that it is already doable with current version.. preparing to get wrecked over here.. mTCP is fantastic. The fact that it is still being lovingly and enthusiastically...
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    Do I really need a CM11 or will a CM5 work for gaming?

    Hometown mentioned! The Romulan Empire is in an uproar over this! Actually this is the second time in the span of a week I encountered someone on the internet mentioning Romtown. Earlier last week, we got a mention in a YT video entitled "Why doesn't Michigan have Emissions testing, Why do...
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    Intermittent Black Holes - Rant

    Those black holes are indeed real. I found that I'm much more likely to summon their appearance if I remove 4 screws from something; it's almost a guarantee that when I go to reinstall those 4 screws, I will only have 3 screws to install..
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    EMS 16-bit Access

    Thanks. I love this machine for what it can't do. I love that it's made up of mostly LSI chips. She has the best power switch in the whole house. THWACK! Call her "Heavy Duty Judy" because she's built like a tank. Seems to be very high quality build, for a Packard Bell. Apparently they made...
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    EMS 16-bit Access

    I am pleased to write that it looks like 16-bit EMS with the RAMpage 286 Plus card is now working, after moving the XT-IDE BIOS into the E000h region. Turns out that I can indeed use the two empty ROM sockets on the PB286 motherboard, to place the XT-IDE R628 ide_atl.bin code at E000h. The way...
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    EMS 16-bit Access

    I should have said ROM sockets, as in plural, as in 2 27c256 EPROMS or something similar. Whatever memory configuration you can muster to form 16-bit words. There must be something I'm missing here, all of the gurus seem to be wondering just "why" I would want to do such a thing. I've been...
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    EMS 16-bit Access

    E000h Region I've wanted to try target this region for test/use for awhile, but have had trouble getting my hands on a 16-bit ISA IDE card with a ROM socket, that can select the E000 region. All of the cards I have only meet two of those criteria.. they can't select the E000h region. Actually, I...
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    When the DB9 and the DB25 are too fat to fit..

    Thank you for the suggestions, Svenska and Bruce. I/O Bracket I do have one of those DB25 serial pigtail brackets, but the I/O card I'm using doesn't have a header for it. I/O card is an AST I/O PAK 286-SP. It's a daughter card for an AST RAMpage 286 Plus, so both cards populate just one slot...
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    When the DB9 and the DB25 are too fat to fit..

    I've just returned from a search to find some sort of "slim" adaptor to use, when your connectors are too fat to fit near each other. No luck. The problem is that I have a serial/parallel I/O card installed in an AT-clone (Packard Bell PB286), where the DB9 and the DB25 ports are too close...
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    EMS 16-bit Access

    Fantastic work! I'll dig into this a little deeper, there's much to take in here.
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    EMS 16-bit Access

    Thanks Rodney -- This whole 16-bit access question I had stemmed from my initial error in how I thought the card I have actually works.. I mistook the register file RAM for some sort of buffer. It isn't a buffer for the EMS. Mistakes/misunderstandings like these is is why I don't make the big...
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