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About Yoruk

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    Chopper Commander
  • Birthday 04/17/1988

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    Computing, electronics

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  1. Yoruk

    Unknow arcade PCB

    Ok thanks to some researches my pcb is very similar to this one : It's a Space Invader clone by Sidam : https://www.arcade-museum.com/game_detail.php?game_id=13301 http://mamedb.blu-ferret.co.uk/game/invasion/ This guy got one : http://www.wolfgangrobel.de/arcadereps5/invasion.htm But unfortunately mine is not exacly like this, the edge connector is different.... Looks like that I have a clone of a clone 🤔
  2. Yoruk

    Unknow arcade PCB

    Hello there, I just got an unknown arcade PCB game, without any text or numbers written on it. There is a 2*22 pin edge connector (key on slot 17). The CPU is a Z80, and there is 7 * 2708 eproms on the left side of the board. On the right side, two 7805, one 7812 and one LM320 (negative voltage regulator). The datecodes of the ICs are from 79 or earlier. The global aspect of the board let me think that it's from the early 80's. Thanks to a multimeter, I manage to identify the mains signals on the edge connector : A "small signal" is an unknown input/output pin, with a small track width (like a joystick input...). Here is the parts side : By any chances, can someone recognize this board or the edge pinout ? I tried to dump the proms, but the 2708 are a bit hard to read (need a ±5V power supply). Thanks in advance ! 🙂
  3. Sorry I wasn't clear. I suggest that you leave the switch in place (you need it to adjust the volume...) but to avoid potential problems, please don't just "bridge" the two contacts on the switch, make sure to unsolder the power wires from it and link them properly one by one. I mean, you may not want to have the power going "trough" a partially damaged part... I may be wrong of course, but leaving a power wire connected on a damaged switch may be a source of problems in the future.
  4. Nice, thanks ! I'll read through this. 🙂
  5. Yes, but I suggest to remove the switch first !
  6. I was willing to post this : But after reading your post again it seems that it's absolutely not this, sorry. So this system was able to record on VCR tape the video output of the console ?
  7. Hello there, Maybe someone could be interested by this, or for archival purposes : a system that can record and load a VCS cart on tape. It was published on the February issue (1985) of the magazine "Radio Electronics" : https://archive.org/details/radio_electronics_1985-02/page/n61/mode/2up Attached is the PDF article. Looks like that there is a part 1 and 2, but I didn't manage to get the previous issues of the magazine. The system is based on a Z80 processor. Unfortunately, no eprom code available... atari duplicator 3 3.pdf
  8. I'll try this "unsigned int8_t itoa" function, thanks !!
  9. Your pictures shows that there is an issue with the Z display axis (the ability of the CRT to "turn on" and "off" the light spot.) If you are familiar with electronics and if you are aware of the dangerousness of the high voltages inside the Vectrex, the first thing to do should be to test the video outputs of the main logical board (I mean, before the CRT/power board) with a scope, just to locate the problem :on the logical board, or on the CRT power board ?
  10. My actual dev enviroment is very light, (Qt creator as IDE, a batch file to compile, and ParaJVE for execution). It works, but it's absolutely not easy to wok with. I've downloaded Vide, I'll sure take a deep look at it. 😁
  11. Ok so this actually works : //* itoa: convert n to characters in s */ void m_itoa2(unsigned char n, char s[]) { unsigned char i, sign,f; if ((sign = n) < 0) /* record sign */ n = -n; /* make n positive */ f=n; i = 0; do { /* generate digits in reverse order */ s[i++] = n % 10 + '0'; /* get next digit */ } while ((n /= 10) > 0); /* delete it */ if (f < 10) s[i++] = '0' + n ; if (sign < 0) s[i++] = '-'; s[i] = '\0'; m_reverse(s); } It adds a zero in numbers <10. So yes, maybe it's just a small issue in the ROM code...
  12. Many thanks ! It should work perfectly. 😃 No, I'll not use the PF for anything else than pure drawing (no collisions checks....).
  13. Aouch sorry for being not accurate enough in my description. My main constraint is to have the multi-sprite kernel. I'll have only one sprite on a scanline at a time, so it should work. So in this case my only chance to have my two colors background is with a standard playfield ? They say that the PF is mirrored (no so problems here), and that I must use the "playfield" command to draw my background. But I don't know if there is color limitations ? I'm not yet familiar with the pfheight variable, I'll try that... Thanks !
  14. Yes I've done that ! I have the web page displayed into Firefox. 😃
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