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About santoscork

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  1. If you find any trouble, please let me know.
  2. I am still on High Sierra but here is what I did. 1 Installed PlayOnMac 4.3.4 (Later OSs will allow for newer versions) 2 Lauched PlayOnMac 3 Clicked the + (Install a Program) 4 Chose to "Install a non-listed program" (clicked that option) 5 Clicked Next (3 times) until I see the options offered by the question "What would you like to do?". I chose "Install a program in a new virtual drive" 6 Clicked Next 7 The next step takes me to a the request: "Please type a name for you application's virtual drive. This name shouldn't contain spaces." 8 I typed "Altirra3.90" which reflects the version I downloaded from https://virtualdub.org/altirra and clicked Next 9 The following screen offers 3 options, I left all of them blank and clicked on Next 10 The next screen asks "What kind of virtual drive do you want to create", I chose 32 bit and clicked Next 11 Then it takes a moment or so to complete a process, you just need to wait a minute or so. 12 I am then asked to "Please select the install file to run". I need to click on the Browse button 14 After clicking Browse, a window titled "Select a file" comes up. As illustrated below, it is on top of my Applications window where I have the Altirra3.90 download I made. I drag the Altirra.exe file and drop it on top of the "Select a file" window. I do this to drag and drop to avoid navigating my file system through the "Select a file" window - it's quicker to drag and drop. I then click the Open window to complete the previous window's instruction to "Please select the install file to run" 15 Now I click Next and Altirra opens. You can configure it now if you wish. 16 I now exit out of Altirra and the window below comes up. 17 I chose the "Browse" option above and clicked Next 18 A "Select a file" window appears 19 I dragged and dropped the Altirra.exe (inside my /Applications folder) file over the window that just opened and clicked Open 20 I click Next 21 Then I chose "I don't want to make another shortcut" 22 I then get this in my PlayOnMac window, an Altirra icon. Sorry for all the steps but that's how I set this all up. Now when I quit and relaunch PlayOnMac Altirra3.90 is persistently available to run. Just like in a real PC, you can double click the Altirra item more than once to open up multiple instances. Hope this helps. PS I imagine the process looks identical or very similar in later version of PlayOnMac.
  3. Hi, just to be absolutely sure. This is for an Atari 800 computer correct?
  4. Why is that? I can't find anything on a bad GTIA causing collision issues in mode 10 but that doesn't mean it doesn't exist. Where is this documented? Maybe @electron can provide a word on this. I believe he created the VBXE. As far as I know the original GTIA stays in the computer and that the VBXE solves all the problems the bad GTIA exhibits. Anyone who read the statement I just made, don't take it as gospel. I know very little and only learned of this bad GTIA China XE machines. Here is an excerpt (Google translated) for the link below as I tried to find something definitive on the collision issue you reported as they relate to XEs made in China and Singapore but no collision issues are reported. https://translate.google.com/translate?sl=pl&tl=en&u=http://atariki.krap.pl/index.php/GTIA. Everything else is just info that doesn't really mean too much I suppose. Some GTIA chips are factory defective, with the main symptoms being that the multi-color modes are displayed incorrectly. There are at least two types of these drawbacks, in the first (and worst) case the multicolor modes work completely badly, in the second - the irregularities are of a slightly different kind and show themselves only under certain conditions. Generally, this is a problem eminently related to the timing within the GTIA, in the circuit that receives data from ANTIC's ANx bus. This is a BASIC applet (by MacGyver ), thanks to which you can easily determine if your computer has a defective GTIA: 10 GRAPHICS 9 20 FOR I = 0 TO 15: COLOR I 30 FOR J = 0 TO 4 40 PLOT I * 5 + J, 0: DRAWTO I * 5 + J, 191 50 NEXT J 60 NEXT I 70 GOTO 70 A simple test for a type two defect With the following program (written in Atari BASIC with fragments of machine code) we can check if the GTIA has a second type defect: 10 REM - GTIA LINE SPLIT TEST - 11 REM ** done by Seban / Slight ** 12 REM 13 FOR I = 1536 TO 1556: READ A: POKE I, A: NEXT I: GRAPHICS 9 14 FOR X = 0 TO 31: COLOR X / 2: PLOT X + 48.1: DRAWTO X + 48.96: NEXT X 15 FOR Y = 96 TO 191: COLOR Y-96: PLOT 48, Y: DRAWTO 78, Y: NEXT Y 16 POKE 87.8: COLOR 1: POKE 710.0: POKE 709.15 17 FOR X = 0 TO 157 STEP 2: PLOT 79.0: DRAWTO X, 191: NEXT X 18 POKE 623.0: X = USR (1536) 19 DATE 169,0,141,10,212,141,27,208,162,6,202,208,253,169.64, Repair There are four known methods to fix GTIA defects: replacement of the GTIA system with a fault-free one installing VBXE in the computer and connecting the monitor via RGB output building a system compatible with Simius GTIA Fixer (it only eliminates the first type defect) feeding the ANTIC pin 35 of the OSC signal from the GTIA system (foot 28) instead of FØ0 (this only eliminates the defect of the second type) At the last minute I did find this comment in a Sophia 2 thread, take a look at the excerpt. For posterity, I found another fix to the bad GTIA but even that page doesn't describe collision issues. https://atari-owner.com/club/articles/fix-a-800xe-65xe-130xe-with-bad-gtia-chip.57/ Image rendered by a bad GTIA on an ATARI 130XE. The obvious fix is to replace the bad GTIA (CO14889) with a good one. Here is a hack by adding a 74LS175 Chip to fix the Bad GTIA (This fix was originally designed my Simius from Poland) 1) Cut the traces that connects Antic Pins 2,3,5 TO GTIA Pins 18,29,20 (see image below) 2) Piggy back the 74LS175 on top of the connecting only Pin 8 (GND) and pin 16 (vcc) Legs Connect Pin1 of 74LS175 to pin16 of 74LS175 PIN 28 OF GTIA (CO14889) to pin 9 of 74LS175 Pin 18 of GTIA (CO14889) to pin 10 of 74LS175 Pin 19 of GTIA (CO14889) to pin 15 of 74LS175 Pin 20 of GTIA (CO14889) to pin 6 of 74LS175 Pin 2 of Antic (C021698) to pin 12 of 74LS175 Pin 3 of Antic (C021698) to pin 13 of 74LS175 Pin 5 of Antic (C021698) to pin 5 of 74LS175 3) The Result Again for posterity only, see link for XE Field Service and search "Bad GTIA" in browser. http://www.jsobola.atari8.info/derelit/xefsm.pdf
  5. I don't know if it would be better only because I don't have enough knowledge on the matter but if it is a full GTIA replacement and is compatible with the XE line then those faulty GTIAs found in the 130XE and 800XE made in China and Singapore would probably also work with a. Sophia 2board. Seems like a reasonable theory anyway. Thank you for raising the possibility. Sounds like it will actually just work too.
  6. I didn't read the entirety of this thread but there are apparently 2 types of GTIA bug/defects that are known, both of which are documented in the Source link provided under the four steps below. This fix is fascinating, 4 in total. The second option is remarkable as it provides RGB out. Repair There are four known methods to fix GTIA defects: replacement of the GTIA system with a fault-free one installing VBXE in the computer and connecting the monitor via RGB output building a system compatible with Simius GTIA Fixer (it only eliminates the first type defect) feeding the ANTIC pin 35 of the OSC signal from the GTIA system (foot 28) instead of FØ0 (this only eliminates the defect of the second type) Source: http://atariki.krap.pl/index.php/GTIA, Google translated, https://translate.google.com/translate?sl=pl&tl=en&u=http://atariki.krap.pl/index.php/GTIA On VBXE: http://atariki.krap.pl/index.php/VBXE, Google translated, https://atariki-krap-pl.translate.goog/index.php/VBXE?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=ajax,elem&_x_tr_sch=http VBXE (aka Video Board XE) summary: In short, VBXE - a hardware expansion designed by Electron for the 8-bit Atari. It consists in the installation of a (quite sophisticated) system that, imitating the operation of the GTIA, generates an RGB video signal (with a horizontal frequency of 15 kHz, although promising work is carried out to generate a signal in the VGA standard). Contrary to the name, the system can be installed not only in XE but also XL computers . Tidbit: VBXE emulation is built into the Altirra emulator. By the way, the specs on the VBXE are ridiculous! You can find a PDF (English) on VBXE right here, https://lotharek.pl/files/vbxe/ Sold here: Lotharek https://lotharek.pl/productdetail.php?id=53 and the Brewing Academy: https://thebrewingacademy.com/products/vbxe-video-board-xe This is definitely worth looking at for resolving the GTIA defect issue.
  7. I am humbled by the quality and quantity of replies. Some of you have left some truly insightful perspectives that touch on the nostalgia and love of the platform while some of you have been recommending all sorts of resources in terms of youtube videos and products. It's an exciting time to get back into the Atari hobby, I can't say I ever left but right now the only thing I have is a 410 recorded. Something my mom posted to me about a year ago (I guess something survived the flood that wiped out my collection). I looked at it at the time wondering why I might want this, what I could do with it. Needless to say, it is in pristine condition but if I manage an Atari 800, which is what I think I need (not want) it will have a host. Many thanks again to all of you for being so generous with your time, your thoughts, opinions and suggestions. It's great to be a part of this community.
  8. You read right through me. There are the two sides and your statement only reinforces I go with an Atari 800. The experimental side of me says get a 130XE or an 800XL, neither have an emotional attachment, well the XE the least but the 800 is that machine that I would hug and without one I would feel I like something is missing. I did have may Atari products, I mean a lot, all of it lost in a vicious flood about 20 years ago. Since then I often long for owning an Atari 800 again. I have a pretty big Macintosh collection but the Atari is by far the most endearing computer in my experience. It was my first computing experience. I believe I will be going for an 800 and build a FujiNet as it doesn't involve an intrusive mod, it's just an SIO device. That may make me happy enough and I could just stop there but if I need something to open up regularly and mod I will likely consider an 800xl or 130xe for that. From what I have learned the XL enjoys better build. I am reading every message that folks post but I just had to quote you because it really captured the core of how I feel when it comes to these beautiful electronic artifacts that have managed to capture our imaginations.
  9. I just noticed … I will refer to that thread and read it with pleasure. Thank you for pinning it (whoever you are).
  10. Dear 8-bitters Your advice on which Atari micro to purchase would be greatly appreciated! I thinking of getting back into the Atari 8-bit scene and plan using the machine with some regularity but am not sure if I should go with an Atari 130XE or Atari 800. To me the Atari 800 is very special indeed as it was my first micro computer so it holds an enormous sentimental place in my heart but then again I might be better off with a machine that has more RAM, has BASIC built-in and can enjoy a larger software base. In addition to this, I would like to get one of those newer hardware add-ons like the FujiNet which I know very little about but keep hearing about or an SIO to SD type of device, something I have also only heard about. The plan is to avoid the need for a floppy drive on either system and if I can load software from the LAN it would be pretty incredible. Can both the 800 and 130XE benefit from either of these hardware add-ons? Can the Atari 800 enjoy a RAM upgrade today and is it relatively affordable? What advice would you offer? Kind regards —Alex
  11. Thanks a million. I am sorry if my questions make it clear that I am rather ignorant by now but I have been away from the scene for a few decades now. I still listen to a bunch of Atari related podcast's because I can't shake the bug so I do stay up-to-date, including of course, K Savet's podcast and his interviews which are gold! To think that I even once owned a heavy sixer (first Atari 2600?) — I picked that up for maybe only 5 Canadian dollars and when I disassembled it (as I was very curious), I saw a logic board that had the Atari logo and below it the slogan, "innovative leisure". I even once owned an Atari iRobot logic board and its' Atari original Hall effect joystick that I managed to wire up to an NEC CRT multi sync monitor. It was the first time I ever referred to schematics and a soldering iron. That was an adventure, the arcade I bought it from on Yonge street gave me a very quick 101 on how to read schematics and one soldering iron later iRobot was running. The 80s and early 90s were very magical as I am sure this audience understands. I will be contacting those user groups to see if I can find any leads! Thanks a million for your help and advise! Kind regards —Alex
  12. Thank you for the additional precautions on shipping, I think I will take your advise and consider purchases in and around the EU where a PAL version can be found. That said I have a few Sony Trinitrons that are both PAL and NTSC capable so the video in shouldn't be a challenge but I can see where shipping can present safety issues for the hardware. You mentioned contacting some users groups around me. I suppose Germany and Poland would be good targets in my case. Other than a google search can you personally recommend a good starting point where I can discover users groups that might have an audience receptive to a sale? I wouldn't mind traveling to pick one up to avoid shipping costs and any potential disappointments shipping might incur. I appreciate your reply! —Alex
  13. Thanks for the reply and insight. I can't believe how really expensive the Atari micros are nowadays but that aside. I am trying to negotiate with a UK seller on eBay who has one for sale. He was gracious enough to modify his sale to include Poland and he will investigate the cost of delivery to me. I remember the 800 was a very substantial machine as far as weight was concerned. Thanks again for the good wishes. It would be a delight to own the classic Atari 800 computer again. I fell in love with it when I sat in front of one for the first time when Atari had a huge presence at the Canadian National Exhibition where they packed all sorts of Atari's of every kind in that huge booth (in fact, it was too big, to call it a booth). It was there that I sat down in front of an Atari 800 running Star Raiders. I had never seen anything like it and the experience has come around since. My recollection of seeing that machine and Star Raiders is by far one of the most jaw dropping moments I can recall.
  14. Where are you based? Shipping would be to Poland but is the price negotiable at all?
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