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Jeffrey Worley

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About Jeffrey Worley

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  • Birthday 06/12/1970

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  • Location
    Miami, Florida, U.S. of A.
  • Interests
    Atari 8-bit computers, Vintage computers, Operating Systems,
  • Currently Playing
    Installing and updating Antonia board (Altera code update), installing and updating a U1Mb (Xilinix code update), building a lot of ten 512k ram upgrade boards for the Atari 800, generally having fun. Playing Gauntletak a little
  • Playing Next
    Burning a new rom for my broken 850 in hopes that's the problem, building a US Doubler for my stock 1050, building a couple of 512k ram upgrades for 800xl machines.

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  1. Honestly, I've only used the Gotek as a loader for a slew of games on the Atari. The reason is that the Atari has an interesting format; all atari formats are interesting in that they all have at least the first sector in single density, no matter what the rest of the disk is formatted as. This is so in order to accommodate (as I understand it), the Atari's original boot scheme, which provides only 128bytes of buffer for disk access, necessitating single-density read(s) for what is usually the first three sectors. Once the code is gotten into memory via this route, it is executed, and the cassette buffer is concatenated to the disk buffer, allowing for 256byte reads and writes. The originators of Atari's Operating System for our machines did not envision support for sectors larger than 128bytes. Percom did a nice job of supplying support, but the solution is not at the ROM level; such support would probably reduce memory available to programs by 1 page, causing compatibility problems with existing software.... I communicated with the Flashfloppy folks on this issue and learned that they were pretty much unaware that there were disk controllers for the Atari 8-bit which allowed for standard sa400 mechanisms, thus support for Atari is only accidental. No effort to support atari formats is planned. I suggested to FlashJazzCat we might benefit from some expertise applied to this issue, but received a lukewarm reception. Flash is busy and I'm not qualified, so someone who has the time and who is qualified to make contributions to the flashfloppy firmware needs to be found if we are to have support beyond standard single-density, single-sided formats using Gotek and Flashfloppy. I have not tested the HXC? firmware nor have I consulted that project. My experience with Atari formats and Gotek have had mixed success: SS/SD works for read, write, and format without trouble. SS/DD works for read, as does DS/DD, so the Homesoft collection works peachy on a Percom or ATR8000-controlled Gotek with Flashfloppy firmware, but one is unable to format these disks, nor is one able to write to them. Given the nature of the issue, I suspect strongly that a bootable disk image in double-density CP/M for the ATR8000 will find itself in the same boat. I have have not actually attempted to use the Gotek on the ATR8000 in CP/M mode as yet. Sadly for this particular case, the ATR8000 cannot format or boot from a single-density disk in CP/M. I suppose it never occurred to the designers that anyone would wish to hobble their double-density CP/M system and thus that inelegant work-around to the problem is foreclosed. Best, Jeff
  2. I've had zero luck with jumpering a Gotek to any but Id's 0 and 1. There's no provision for it in the hardware. It would be fairly simple to flip some wires on the cable to accomplish this though. Best, Jeff
  3. A terminal program is the way without any additional hardware. A Gotek would be awesome of course, and solve a lot of troubles. For the ATR8000, the only term program I'm aware of is the version of MODEM7 shipped with the CP/M disk. This is because the ATR8000 uses a software UART, thus simply changing a couple of values in a program's configuration, as with most CP/M boxen, won't do the trick. The good thing is that MODEM7, as shipped for the ATR supports Xmodem and XmodemCRC (Once called Christiansen Protocol, after Ward Christiansen who wrote it). A GOTEK is the preferred way of course, as it is fast and allows you to use the images you move to the USB stick directly. Best, Jeff
  4. God speaks Polish as well or better than BASIC. God Loves the Polish and so do I. Go Atari! Go Poland GO AMERICA! 🙂 /s
  5. I had one of those Quantum q2020 drives Bob Puff was selling with his Black Box kit. HUGE, MONSTER drive man. Weighed 70lbs if an ounce. Best, Jeff
  6. Captain Crunch. Nice touch. Is there a 2600hz whistle in that box?
  7. I had that same printer. A Panasonic KX-P1091i. Beat the pants off anything Atari-branded, a fast workhorse.
  8. The biggest difficulties with upgrading the Atari 8-bit in meaningful ways are upshots of the things that made it so special and powerful. The machine is tied to NTSC/PAL/SECAM for graphics output and for system timing. The whole machine is wrapped around the TV standards of the 1980's. To add more sprites or colors or whatever would have been easy enough, but to add PIXELS, add RESOLUTION, which we all wanted and which would have been the definition of 'upgrade' to most of us, was impossible. The screens didn't exist to use higher resolutions, and those that did, like VGA monitors, were expensive and not really compatible with the colorclock timing of the Atari. The original design, in this sense, was a very nice, big boat you built in your basement..... The same applies to system speed. The system's clock is dependent on the color clock, being a multiple of it, and the graphics hardware can't push faster than color clock without the addition of a slew of expensive parts, so they didn't do it. Even the sweet16 and, lately, Antonia, operate the system bus at the stock clock rate, no practical way around it short of replacing the entire system with an emulator. Best, Jeff
  9. I first saw the cart in an advertisement that came with my RTIME8 cart, last page of the manual or something. I was only 16 or 17 and had little in the way of income, but I sent them the 79.00? pre-order right then and there. I got one of the first carts off the line. When I finally got the thing in hand, some months later, I was astonished to see how well-done the manual was. Last thing I expected. I read the thing cover-to-cover, probably several times. SDX was better than I could have DREAMED when I read the advert. And it is still going strong. Fat16 support!, all kinds of groovy stuff. God Bless ICD and the coders who worked there, and God bless the folks at the Spartados Upgrade Project (Drac030?). Best, Jeff
  10. Much of the good system-software, as opposed to games, uses the extra memory (of XL/XE) in one way or other. These don't run on the 400/800. However, when you have a dos like SDX, that uses Axlon ram to move itself into, that makes a big difference in compatibility with such software. best, Jeff
  11. https://www.amazon.com/gp/product/B08B3VCK42/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1 These are the ones I bought for mine. Best, Jeff
  12. I replied to this and for some reason it did not post, so if a duplicate appears.... well, things happen. The board works great in the 400 as a 16k board. Only uses 5volts. In the 800, it must be accompanied by at least one stock 16k board (or another of this very board acting as a 16k board) in slot one. A 48k base memory machine requires a 16k board in both slots 1 and 3 and this board in slot 2. To get 544k out of the machine, this board in slot 2 needs a wire attached to the personality board. One could use a test-clip to do this connection instead of soldering it as I've done. The back of the board has a resistor and a small capacitor as a final bodge to complete it. The resistor is a pull-up and is documented in this thread, pretty early on. The two components are required for proper function. IIRC, the resistor is 3.3k ohm and the capacitor is a .1uf. One could populate all three slots with this card and wire just the one in slot 2 to the personality board. This would give you a very low-power configuration that would be very nice on the power supply, as opposed to the stock Atari cards, which use 5volts, -5 volts, and 12 volts (and -12 volts?). It is a drop-in replacement for the stock card. Best, Jeff
  13. Anything is possible, but I very much doubt it. Honestly, I would suspect something strange with my drives. I wish I had all my known-good stuff to test your stuff with and find your fault. The 'net is a fine thing, but somethings require physical gear/presence still. Sigh. Best, jeff
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