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_The Doctor__

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Posts posted by _The Doctor__

  1. It's not strange, they are tuning the frequency by slight. I posted a link about load tuning a crystal, and that's what this is. The frequency of the crystals are not all the same and need to be dialed in for this use.

    You can verify the frequencies with a scope for each part number. Do it with and without the capacitor, or a different  capacitor of a slightly different value and watch it change.

  2. The Tandy machines flew off the shelves, even Radio Shack locations were sometimes lucky to still have a floor display of the machines available to sell. That of course changed as people became less afraid to put in their own video and sound cards for other machines. Many graphics cards were a bit pricey and Tandy's solution bridged the gap. Their machines were very popular for a number of years as it was ready to go, looked and sounded great.

  3. 4 hours ago, dmy said:

    @TZJB After backing up some disks (~10) I again got 144 errors, re-opened the drive and the drive head was dirty again. Not as bad as in the picture above but it did have skid marks. The disks do not have any mold so it must be disk material 😱. Is it possible that the previous owner replaced the felt skid and the pressure on the disk/head is too high? How would I check that?

    put the Tension adjust on  lighter setting, and you really should be cleaning the drive every 4 disks if doing a dirty collection, and leave the case off to visually inspect the head after each as you go. If you see anything, clean and DRY. If not you risk damaging good disks, and the drive as a dirty head can cause binding and excessive heat on the head as well as high motor current draw.

     

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  4. The Tramiels screwed over the retailers and the distribution network many times, not to mention the repair centers- because their dream was to do it all themselves. After Federated blew up, they had the nerve to ask the same people to outlay massive cash all over again to do what they already paid for and were doing before TramTari forced, bullied, and f*cked these folks out of business. No way your dropping 50K or more to go back into it with people who did that to you in the first place. They made war on the support, delivery, and repair streams of their product, then wanted what? Not a chance. While were at it, lets freeze and delay the release of key products and get rid of the engineers, programmers, and designers/architects. Yeah real smart, SMRT!

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  5. https://techoverflow.net/2021/07/26/how-to-tune-your-crystal-oscillator-to-get-the-best-possible-frequency-accuracy/

    explains quite a bit, there are a number of tutorials but many don't take load into consideration

    consider it an adjust by slight, but a tuning fork can only be stressed so far before it's no longer resonating at the right frequency.

    You crystal is a tuning fork by all accounts.

  6. if you aren't restoring to or pointing to specific data block, putting as many things on a line as possible helps. Same thing goes for command lines get as many on a line as possible. only using another line when something needs to go to it specifically

    you still want to follow all the order of operation speed ups of Atari Basic, it helps when FAST mode fails. Looks like you've done pretty well in that regard.

    You still want to compress line numbers down to as small a series of digits and get as much on a line as possible, while FAST mode does do addressing of the line ahead of time it still helps for the process of doing that or if FAST fails keeps things moving as best as possible.

     

     

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