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globeron

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Everything posted by globeron

  1. I replaced these 4 x 5V regulators. (Not the 12V regulator)., found it difficult to desolder them and get them out (took 2 hours). Now replaced them and it seems the Geneve 9640 is much more stable and not hanging so far. I need to test it a bit more, but so far it looks okay. @InsaneMultitasker thank you very much for your guidance!
  2. First I thought it was Under-voltage detected issue Connected a screen and keyboard and saw that WiFi was blocked by rfkill. This website has the solution to copy the wpa_supplicant file to the boot directory. cd /etc/wpa_supplicant sudo cp wpa_supplicant.conf /boot After fix. Note it complains about the apache HTTP server, But http://192.168.1.52:9900 works And also mapping the network drive works in windows \\192.168.1.52:9900
  3. I am using a RPI3b+. But I am having issues. Not sure it is the SD card 8GB. Now tried another card SanDisk 4Gb. Sometimes it just hangs in the TIPI interface and I am unable to get connected to WiFi (eg. After a write config it hangs). (My older image works all fine v10. 1.65) I can try to overwrite on this SD card to see if the SD card is the issue, but I doubt it.
  4. Just played Astro Fighter on RetroPi (TI/Sim) but miss the top of the shooter rocket somehow. Maybe issue with number of sprites used. Sent from my iPad using Tapatalk
  5. Just played Astro Fighter on RetroPi (TI/Sim) but miss the top of the shooter rocket somehow. Maybe issue with number of sprites used. Sent from my iPad using Tapatalk
  6. For TIPI users. CALL TIPI("PI.HTTP://MYTI99.COM/CHESS") by Electriclab. V003. (Only the setup of queens are wrong. Queens chooses color. White queen on a white square at d1 and black on black square d8) and I believe certain moves don’t work like castling 0-0 and 0-0-0 and en-passant moves) but the setup is a great idea! (For non-TI. Chess I am using recently Lichess (userid Globeron) on Android, iOS or browser. Sent from my iPad using Tapatalk
  7. For reference - saw this 9918 / 9928 article in Retromagazine 4 EN version. Page 5 to 7 https://www.retromagazine.net/download/RetroMagazine_04_eng.pdf
  8. Thanks Jens-Eike. I will check it again when back. Did not notice that earlier.
  9. I get this once in a while. My plan is to follow you to replace capacitors, but a bit afraid my board will not work after that anymore
  10. This is the original chip. I put the sticker on it as otherwise i cannot identify how to insert it.
  11. Exactly, the way how my father used this device I remember as a kid was as to use it as a portable device with a cassette recorder to load programs. at another location (events, etc.) but had to keep the power always on . I sold the device in the big sale last year. Just made the videos to share with everyone and to remember the device in action (on TI99 VIDEOS channel on youtube).
  12. I cannot read the label anymore on the chip, it is all washed out, but you are right I think I switched the numbers. European consoles Din 6 pin have YPbPr component output which works with GBS8200 Then it is probably a 9928 chip and it explains why the 9928A chip? of my european /4A works. (The earlier tests where with a chip of a /4A of the US, 5 Din plug which is 9918A and NTSC) I have another /4 of USA with a 5 DIN plug which works with a composite cable directly into the TV. (This one is then the one with the 9918 chip in it). There is somewhere a link which describes the differences between pins on the 9918 and 9928 chips. Edit: Link http://www.unige.ch/medecine/nouspikel/ti99/tms9918a.htm
  13. Also noticed when assembling all together that the keyboard metal connectors touches the metal coverage and gives keyboard errors. Here it is fully assembled TI-99/4 with built-in Speaker and earpiece connector. 20201219_172951.mp4 This TI has the power connector with the BIG pin. As the original power brick was broken a long time ago a converter was made with a meanwell adapter.
  14. I have it working now, but only with GBS8200 device. First I replaced the crystal from another /4A, did not make a difference. Then replaced with another 9918A chip of my european ti/4a PAL. (maybe the other chip is a 9928 as that was a usa console NTSC) of another /4A, then it suddenly worked with the GBS8200, but the PAL is weird enough still black and white. Not sure if there is a difference? The original 9918 chip shows the screen completely scrambled. The /4 is a European console with DIN6 pin, But now with GBS 8200 is sharp (and a bit flattened colors as expected). Parsec still does not work with 9918A chip in a /4 console. Furthermore i wanted to troubleshoot with the F18A card, but I cannot fit it in a /4, because of the orange component.
  15. I changed the 9918 to 9918A (seems he 9918 gave some visualisation problems when it becomes hotter, i did not try thermal paste yet). I tried different PAL modulators, one gives me this type of colours in the video. Maybe it is the crystal related? (As i tested the PAL modulator on my TI-99/4A and gives a good video output)
  16. I do not get any output via gbs8200 using the /4, but it is okay with /4a. seems some video synchronization issues. I did try the variable inductor, I do not see a change and now not sure if it is back to set to original setting.
  17. I changed the 9918 to 9918A (seems he 9918 gave some visualisation problems when it becomes hotter, i did not try thermal paste yet). I tried different PAL modulators, one gives me this type of colours in the video. Maybe it is the crystal related? (As i tested the PAL modulator on my TI-99/4A and gives a good video output)
  18. The /4 keyboard seems to be working again for now. I reseated all the socketted chips, not sure if it has to do with that. (9901 NL is not socketted).
  19. Okay. I will check that. Thanks for the guidance.
  20. I ordered a 9918A via ali express and will try. The black and white screen captures. One is with a Pal modulator and the one with a bit of colour is gbs8200 (which maybe spreads out colour) But was wondering if it can have to do with https://www.ninerpedia.org/wiki/Troubleshooting there are some Vram that change.color (red green blue). Bit 5 6 7 ?
  21. The colours and keyboard used to work, but I had the video issues already
  22. If I remember correctly the whole keyboard worked before, but now only the left half works I do not see loose contacts.
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