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Showing results for tags 'schematics'.
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The title says all, I have converted the existing schematics into Kicad. This is the 1.0.0 release, and hopefully there will be no erratum. https://github.com/sporniket/kicad-conv ... /tag/1.0.0 The release provides a PDF with the schematics, a PDF with the silkscreen of the motherboard reconstruction, and a ready to use Kicad project (libraries included). For the schematics, I have decided that : Symbols for the ICs will show the physical layout of the pins, as it makes it easier to spot the pin on the real IC (for me at least). And because thanks to that, the GSTMCU still fits on an A4 sized sheets. On one occasion I deviated from this choice (for the dma sound amplification and filtering) as it obfuscated too much the circuit. Each original sheet is splitted so that each sub-part is printable on a A4 sized sheet. A Table of content I also have mentionned some fixes that would be usefull/mandatory. DMA pull-up on databus WD1772 pull-ups LMC audio mix fix RGB Video ghosting fix C415 that should be reversed The projects contains an approximative reconstruction of the motherboard's PCB. It will be good enough to locate a given component and to know how a signal is distributed accross the board. And it allow to make nice 3D renderings.
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Hi, I was wondering if there are any technical drawings of the 600XL/800XL keyboards? Not just the keyboard matrix, but things like keycap sizes, spacing, et cetera. I have looked around, but couldn't find any. Or perhaps somebody with a caliper (which is still on my to buy list ) could make some measurements? Regards, Ivo
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I'm looking for the schematics for the 7800. They were hosted on atarimuseum.com, but sadly the owner has passed. Does anyone have the schematics and any programming books? I'm sorry if they are here and I've missed them. Thank you
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Hi, I have been resurrecting my older TI equipment and I am down to one non-QI motherboard left to repair and two QI console power supplies that are not working. I would like to repair them but I haven't found any schematics to make the job easier. I am capable of tracing these out and making a schematic but I'd rather not reinvent the wheel if their is already a schematic floating around. I have found the non-QI power supply schematics in my places. Does anyone know of a schematic for the QI console power supply? BTW: The motherboard that needs repair is from the first TI I bought back early 83(??? hard to remember but the chip date codes match this). My wife-to-be was vacuuming and hit a connecting wire, the video out I believe. The cord was sucked up and stripped and the console smoked (the pcb trace for sound to the DIN connector vaporized and a number of other failures). I saved my money and bought another console and put that console aside since then, about 39 years. So their is sentimental value in getting this console running again ? Thanks for taking the time to read this! Any help is appreciated. Mark
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Hello, For my own needs, I have converted the Atari STE schematics (6 sheets of A3/A2 size) into Kicad : 28 A4 sized pages + a table of content page, the same annotations between the original and the conversion. The release candidate (the pdf, and a tar.gz of the kicad project) is here https://github.com/sporniket/retro-computer-clean-schematics/releases/tag/c300780-001--Atari-STe-Motherboard--v1.0.0.rc1 I plan to do the final release by the end of August. If you happen to find a typo, please report to me. Regards
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I traded one of my working 2600 for untested 5200 with 2 ports. I expected 5200 to be non working and I was right. It doesn't work. I just have black screen with any game I tryed. Power adapter is working and I hawe LED light ON. I downloaded schematics and noticed that there is two 7805 power regulators. Checked one in VR1 location and no power in or out. Checked other one in VR2 and my power out is 5.10 VDC. I don't know is that normal or should I have closer to 5 VDC? Anyway I am not sure for first 7805 in VR1, should I have power in there or that one receive power latter when some switch send it throug? I decided also to check power in all chips under metal shielding and found out that I don't have power in A7, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24 and A25 (chips are marked in red on photo). I am not sure what to do next. I did fix some 2600s, but 5200 is much more complex console. Anyone who can help?
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- black screen
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Is anyone still in contact with Ron Reuter and/or know how to get in touch with him? I'd like to obtain a copy of his Geneve schematic working files, if he still has them and is willing to share. It would be nice to update the native files as there are some additions and corrections required.
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I booted up my Atari 2600 JR the other day, and I found that both controller ports were unresponsive to any input from the paddles or joystick. I popped it open and took a peek at the board, and there’s no visible damage. I’m using the attached schematic and a multimeter to try and find the issue. I’ve tested C20 and L3 but they both work fine. I suck at reading schematics. What components should I be focussing on to test?
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- atari 2600
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I need help in finding of schematics of a homemade Soviet TTL arcade machine (read more from here) from this book: M.A. Ovechkin, DIY video games. I couldn't dig up very much information about the book nor about the author (googling his name just came up with pictures of some hockey player). Good luck with finding this book or the schematics from it.
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"My detailed study of them will show me that they were not reliable: Several errors slipped inside. The first step was a precise study of the logic of the microcomputer in order to detect all the errors. It was a very interesting step." Fabrice Montupet made this statement in his TI(ny)-99/4A thread in June '17. So far I have not found any errors in the schematic that I have. I can imagine he has had many requests for details on his findings. I do not wish to waste his time if he has already provided this information somewhere. I did search for a while, and I found schematics for what I presumed was the PAL version of TI99/4A, because it had a TMS9928A. But then I saw that it still had a 10.7 MHz crystal, so it couldn't be PAL. A little research revealed that the TMS9929A is the PAL version of the 9928A. Since Fabrice lives in France I further presume the PAL version would be the one he uses (I think I recall him saying somewhere that the 9929A was his favorite VDP ), and this schematic would be the one that has the errors? Or perhaps he is referring to differences between the NTSC schematic and the PAL version? I really just want to know if I need to be wary of errors in the NTSC schematic for now. However, in my search for schematics, I have not come across any for the beige version of the TI99/4A. I understand there were some significant changes made in how things are decoded in these units. Is this info out there? If so, where is it? Thanks, HH
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Hi everyone, been awhile since I've posted here. I have a Colecovision pcb I've been trying to troubleshoot. The problem is, the board is an older version and the schematics...the only schematics...I've found seem to be for a later revision. The board revision is 75743 Rev C. The daughter board is revision 75745 Rev B. The console powers on, boots, plays and has sound but no display. Upon opening the console I found that someone had done some work to the daughter board in an attempt to repair it. The problem is every time I try to follow certain traces it leads to something else in the schematics or vice-verse. I've verified voltages are good, cleaned the power switch and tested for video on pin 36 of the VPU. Even if someone can post a picture of the section with the daughter card removed might be helpful. The best would be if there are schematics for this revision but I'm not holding out hope for that Any help or advice would be great, thanks
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- Colecovision
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In my effort to provide documentation for lynx, I've started a new task : "vectorisation" of the Atari Lynx Schematics. I've done it with KiCAD. The schematics are based on the 4 part of Atari Lynx Hardware Schematics This is not the "final" version. Some parts were hard to read/understand. If you see any mistake, please feel free to report it. Schematics v0.1.pdf
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Here is a new thread for photos, drawings, schematics, blue prints, or anything that can be considered "ART" suitable for framing and displaying in our dens or game rooms. The only requirement... it must look good when printed out as an 8 X 10 for a photo frame. Post 'em if you got 'em!
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Hello TIer! I recently look for TI-99/4A schematics and found the usual material on WHTech FTP-Server. But these schematic diagrams are not very useful. They contain errors, are badly readable and you can't do nothing else than watching them. Unfortunately I can't find any digitally captured schematics, so I started to make some new by myself. The first schematic I redraw was the one of the TI console. I took this original as a template. Currently this schematic could contain more errors than the original, because I can't decipher all the small printed and unsharp displayed values and reference numbers of the components correctly. But it should be possible to generate or design a new PCB from it. With this work I also try to separate some function blocks into its own schematic sheets. So the schematics for the console is split into multiple files: CPU Sound Video Keyboard (with Joystick and cassette port) RAM/ROM 8 to 16 bit switch, which generates the A15 GROM logic I/O Ports internal address decoding My work is published in a new repository on the well known git hoster bitbucket. All schematics are (and should be) created with the KiCad EDA, a cross platform and Open Source Electronics Design Automation Suite. I hope here are some people who are willing to support this activity. Greetings!
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Hello. I found an old Atari 2600 console clone in my basement. Seems to be broken, some parts are missing, but the chips are all OK (CPU and ROM, I guess). Therefore I'm wondering about reusing these parts somehow on a breadboard or something. But in order to do this, I need some information on these chips and their pinouts, maybe some datasheets or schematics. The chips are labeled as follows: 6591 9208A 922511 DIP-48 (two rows of 24 pins each, 48 in total) Seems to be the CPU. WB2600-4MP DIP-32 (two rows of 16 pins each, 32 in total) Seems to be the ROM. As far as I know, there was no cartridge slot, so the games must be stored on that ROM. There's an empty place on the PCB for another DIP-28 chip, the silkscreen label says "IC3 512K MASK ROM", but there is no chip there and it seems that it has never been. HD14011BP 2C26 Just four 2-input NAND gates. MC14024BCP FFES9206 Motorola chip, 7-stage ripple counter, I guess for clock division or something, since it is near the quartz resonator. The resonator is: STANDARD 17.734475 (which I guess is its frequency in MHz) I see no separate TV circuit/chip, so I guess the TV signal is generated on the main CPU somehow. Could it be that the CPU has a TV signal generator integrated in it? I can post some photos of the PCB if needed. But I hope the labels on the chips will be enough for the experts to identify them. Can anyone help me with identifying the chips and supply some descriptions of their pinouts? Perhaps some more detailed datasheets? --- I also found an old Atari 65 XE motherboard. Unfortunately it's broken in half so the chips in the middle of the board are broken as well ;/ But other chips on the edges of the board are OK, so I'll try to reuse them as well. But I'll describe that in a separate thread later.
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I've scoured the web and the AA archives and I can't seem to find any schematics for the 7800 Maria. I'm referring to logic diagrams for the chip itself, not the 7800 motherboard. These do seem to exist for TIA but I can't find any for the Maria. Does anyone know if they even exist? Surely GCC must have had to conceptualize the internal logic of the chip at some point during development, right? The reason I ask is because I'm working on a hardware project for the 7800 and I've hit a point where I fear the only way to proceed forward will likely be to attempt to replace the Maria chip with an equivalent. This has already been done with TIA but I have yet to see this done with Maria. If anyone has any information at all, it would be greatly appreciated.