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Thread: XTIDE Universal BIOS

  1. #451

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    Quote Originally Posted by blackepyon View Post
    ....There's a data-protection flag you gotta set properly when flashing it, otherwise you can't re-flash in the utility without using a programmer to wipe it, and I'm still trying to figure out which way it's supposed to be set. But these programmers have other uses, so worth keeping around regardless...
    I've never set the data protection flag in XTIDECFG one way or the other, I always leave it enabled, As far as i know XTIDECFG will set the flag accordingly while erasing and reset it when finished depending on if it's set or not in XTIDECFG. The only times i have had to use a programmer to erase the EEprom is when i had a bad flash, That was back in the early days i got the bad flash every so often, I have not had one of those in a very long time. Yes well worth having a programmer or two, I have 6 of em.

  2. #452
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    Quote Originally Posted by Malc View Post
    I've never set the data protection flag in XTIDECFG one way or the other, I always leave it enabled, As far as i know XTIDECFG will set the flag accordingly while erasing and reset it when finished depending on if it's set or not in XTIDECFG. The only times i have had to use a programmer to erase the EEprom is when i had a bad flash, That was back in the early days i got the bad flash every so often, I have not had one of those in a very long time. Yes well worth having a programmer or two, I have 6 of em.
    Huh. Never worked for me. I could flash it once, and that was it, then I had to wipe it with the programmer. Which card do you have? It kept giving me a timeout error, when I tried reflashing it, but I've since moved the '245 buffer on the protoboard card closer to the bus (it's based on the XT-CF rev.2) and that cleared up some other issues I was having, so I could try again and see what happens.

    If you're wondering why I built it on a protoboard instead of buying one of Lo-Tech's boards, it's cause my Tandy 1000HX only has so much room, and I had mo more space for another ISA-PLUS adapter, so I had to build it as a PLUS board. I'm trying to figure out if something in the construction might be causing that timeout error when re-flashing.
    My vintage systems: Tandy 1000 HX, Tandy 1000 RSX, and some random Pentium in a Hewitt Rand chassis...

    Some people keep a classic car in their garage. Some people keep vintage computers. The latter hobby is cheaper, usually takes less space, and is less likely to lead to a fatal accident.

  3. #453

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    I have original VCF revision 1 - 2 and Glitch's R4 XTIDE cards, I also have a couple of lo-tech ISA - CF cards, When you say (it's based on the XT-CF rev.2) do you mean the lo-tech ISA - CF card or the VCF XTIDE R2, What EEprom is it using.

  4. #454
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    Sometimes you have to futz with the SDP setting. I haven't dug into why it's an issue with XTIDECFG. I've used the AT28C64B in several other projects, along with other EEPROMs that use SDP, and never had a problem with it. You just send a specific byte sequence to a specific set of addresses before writes to "unlock" SDP. There's a sequence you can send to completely disable it, too, but I always use it as a backup safeguard, in case someone leave the write switch on.

  5. #455
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    My card is based on the ISA-CF r.2b (the names keep getting switched around, depending where you look). I'll fiddle with the SDP setting when I have a moment, and see if moving the '245 solved it.
    My vintage systems: Tandy 1000 HX, Tandy 1000 RSX, and some random Pentium in a Hewitt Rand chassis...

    Some people keep a classic car in their garage. Some people keep vintage computers. The latter hobby is cheaper, usually takes less space, and is less likely to lead to a fatal accident.

  6. #456
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    -Continued-

    Aaaaand.... It seems to be behaving itself now. Go figure. Perhaps it was the location of the '245 after all. It lets me re-flash within the XTIDECFG now.

    It also had trouble recognizing all but one 16MB CF card before I moved the '245 (see first picture). I figure that having all the signal wires bundled together originally might have been too much noise for it. Any ideas?

    XT-CF PLUS show back.jpgXT-CF PLUS show front.jpg
    My vintage systems: Tandy 1000 HX, Tandy 1000 RSX, and some random Pentium in a Hewitt Rand chassis...

    Some people keep a classic car in their garage. Some people keep vintage computers. The latter hobby is cheaper, usually takes less space, and is less likely to lead to a fatal accident.

  7. #457

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    I'm no fan of those cheap CF adapters, Over the years i've found them to be the cause of so many problems, They either don't work or work and fail after some use, They all ended up in the bin, I'd rather pay a bit more and get a decent one or more recently i've been using SD card adapters and a couple of DOM's i removed from a couple of thin clients i upgraded with SD card adapters for more storage space. I don't own any Tandy's so don't know how much room you have to play with.

  8. #458
    Join Date
    Feb 2017
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    Chilliwack, BC, Canada
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    Quote Originally Posted by Malc View Post
    I'm no fan of those cheap CF adapters, Over the years i've found them to be the cause of so many problems, They either don't work or work and fail after some use, They all ended up in the bin, I'd rather pay a bit more and get a decent one or more recently i've been using SD card adapters and a couple of DOM's i removed from a couple of thin clients i upgraded with SD card adapters for more storage space. I don't own any Tandy's so don't know how much room you have to play with.
    Actually, this is one of the CF adapters that I've had the least problems with. I'm curious to know what goes wrong with them. The only thing I can think of is that some of the cheaper ones don't have any decoupling caps.

    For an example of how little space this machine has, take a look at this:
    IMG_20190101_164410058.jpg
    These picture were taken before. There's a total of three slots. The RAM card beneath has the riser headers for the next two cards, and I've got an I/O card on top for the use of it's serial port, because this Tandy doesn't come with one with which to use a mouse. PLUS cards are more or less electrically compatible with the XT/ISA bus, so a simple adapter can be used to plug in an ISA card, but that usually takes up space, forcing the card to misalign with the slot, or you need to use a ribbon adapter, which itself takes up considerable space.
    CAM00390.jpg
    This is with the ISA I/O card installed on top.

    Another interesting thing I discovered, is that before I moved the '245, with that ribbon adapter installed, regardless of whether the I/O card was present, I had trouble recognizing certain CF cards other than that 16MB card, but as soon as I moved the '245, the issues disappeared. So I think the issue was related to signal noise.
    My vintage systems: Tandy 1000 HX, Tandy 1000 RSX, and some random Pentium in a Hewitt Rand chassis...

    Some people keep a classic car in their garage. Some people keep vintage computers. The latter hobby is cheaper, usually takes less space, and is less likely to lead to a fatal accident.

  9. #459

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    I see, Not a lot of room, I've had CF adapters with crap solder joints, bridges in the trace's which burn after some use, Grounded pins that stop a computer from booting when connected to certain IDE/Floppy adapters, CF card corruption, Intermittent CF detection and lost a couple of CF cards when the adapter failed. etc etc, I don't buy them anymore, The only one's i like are the rear accessible type, never had a problem with those.

  10. #460
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    Chilliwack, BC, Canada
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    Quote Originally Posted by Malc View Post
    bridges in the trace's which burn after some use
    Does China have regulations against leaded solder? I know tin whiskers are a thing, and the CF card socket's pins are probably just close enough together for that to become a problem over time if they used lead-free solder.
    My vintage systems: Tandy 1000 HX, Tandy 1000 RSX, and some random Pentium in a Hewitt Rand chassis...

    Some people keep a classic car in their garage. Some people keep vintage computers. The latter hobby is cheaper, usually takes less space, and is less likely to lead to a fatal accident.

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