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fabrizio

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    Texas Instruments, curta, hp, apple

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  1. They are new constructions, I have built 5 of them, two without problems, three have this defect, I was wondering if anyone assembling these PCBs has had a similar problem. Thank you
  2. hi, everyone, I have two fg99s with this problem, when I insert the SD card with the update.pld file the LED stays on, and never goes off. Has this happened to anyone? I tried replacing both the 328p and the Xilinix...
  3. What do you think is the game or program to best test FinalGrom?
  4. Ciao everyone. I have this issue. When it starts cold, you can see characters flashing (video). If try to heat up the 7400 (C15) or the 74175 (C13), it start working fine: clear screen, rset ok, 480 nS and 3,5 uS perfect.Of course, I've tried replacig them. grazie VID_20240209_185251.mp4
  5. thanks😀 the pld file works (80k) and I also checked on github, I continued to use this file always in github finalgrom99/vhdl/src/fg99-xsvf (1K) . I was probably wrong about something..🤬. VID_20240217_132111.mp4
  6. thank you very much, we assembled these FGs, the situation at the moment is this, AVR programmed with Atmel ICE and verified with a working FG. I don't understand if the problem could be with CPLD or with ATMEL. When I power the FG the LED flashes approximately 1 time per second, if I insert the SD with the CPLD programming file and do the reset, the LED flashes six times quickly, I have tried various SDs..
  7. Can someone send me the file fg99-xsvf for working ti99?
  8. I have tried some that I have used in the past, perhaps the problem is another, we are soldering some FG99s for the associates, that's why I was asking the meaning of the LED that flashes for 6 times. Any errors during the update will be indicated by a blinking LED. The blink pattern tells you what kind of error occurred: #U1 (o)........(o).........(o)........(o)........(o)........(o) ... indicates a bad SD card reader, a bad SD card, or the wrong filesystem,
  9. Good morning, we are building some finalgrams for the associates, but I have a problem with programming the Xilinx. Here's the situation: when I power the FG without the SD, the LED blinks once per second approximately. When I insert the SD, the LED blinks rapidly for 5 times, stops, and then starts again. I've tried multiple SD cards, do you have any help? THANK YOU
  10. Hi, I tried this solution which uses the trimmer and a 10 uf capacitor, in fact the volume has improved, but it is still low. Has the fw been changed?
  11. do you have the schematic of this cable ?
  12. I use a ti 99 as a forklift to do some tests, for the micro I used a socket with a tulip pin, but if I find a zero insertion socket I try it ... As for the TMS9929 I bought 10 in china, they work everyone, incredible. While the first 5 purchased some time ago, only 1 worked ....
  13. To test the tms9929, I use the ti99 with a zero insertion socket.
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