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  • The NMK110 is not the sound CPU but an MCU used as protection.This means this second board runs unprotected code.Hence the lack of sound depends from something else.

  • If you get a black screen, the problem is elsewhere hence replacing the HK-1000 will not fix it.Probably you must reflow the GP9001 custom ASIC since it generates all the video timing signals. But if you get a static garbage screen on boot then the HK-1000 could be the issue since it's involved in main CPU data bus too.

  • The DS5002FP is a little "bastard", it can suicide also if you fiddle with it with a logic probe or multimeter, tried on my skin!

  • Quote from Apocalypse: “What about using FeRAM? ” Non-volatile RAMs?I don't know, I never tried.It could work, I can do some test.

  • Quote from Morden: “Is there a way of permanently desuiciding these boards, eliminating the battery? ” Only using patched program code.Some games, like Alligator Hunt, have also unprotected ROMs.

  • Quote from Morden: “Now, I assume the program you're supposed to send is the contents of the thoop2_ds5002fp.bin [CRC32 6881384D] file, just rename it to hex. It's 32 bytes. I'm asking for some guidance, because it's the only TH SB board I have, and Gaelco games are really dear to me, so I wouldn't want to screw anything up. ” You must first convert the MAME dump from .bin (binary format) to .hex (Intel hexadecimal format), there are different tools avaiable on the net.Then you have to open the …

  • Someone asked me in the past to explain how to properly desuicide other Gaelco games than the usual World Rally so here we go : caiusarcade.blogspot.com/2020/…aelco-pcbs-right-way.html Credits to Peter Wilhelmsen and Morten Shearman Kirkegaard (R.I.P) for their research and help.

  • Time ago I successfully converted to GAL devices most of native Out Run dumps.I remember I was able to fit equations of this '315-5227A' onto a GAL18V10 because there were too many product terms for a GAL16V8.

  • You probably damaged the custom '315-5296' which handles I/O.Are there external pull-up resistors/arrays?Now I can't remember.I ask this because usually these I/O customs can have internal pull-up resistors so it could also be you only burned them.

  • Double Dragon Technos

    caius - - General Arcade Tech Help

    Post

    Yes, I converted this BPROM to a GAL16V8 so you can replace it.Simply program a GAL16V8 with my .JED, then tie pin 8 to pin 10 of the chip, lastly install the chip in the socket. There is also another BPROM on the VIDEO board of Double Dragon but it's a different type and cannot be converted into a GAL device

  • InfiniKey-CPS2

    caius - - Temple of the Undamned

    Post

    This new set of 19xx has been added to MAME source : github.com/mamedev/mame/commit…cd2f0e05a2b040eb75acf9855 In case anyone needs to resurrect their board... PROGMEM = { 0x07,0x00,0x02,0x40,0x00,0x0A,0x04,0xC2,0xA4,0x02,0x02,0x21,0xE8,0x85,0x13,0x2A,0x2E,0x46,0x8B,0x00 };

  • InfiniKey-CPS2

    caius - - Temple of the Undamned

    Post

    Will do ASAP, thanks.

  • I had a similar issue on a P.O.W- PCB (so another SNK game on similar hardware).The pixels spread on screen belonged to sprites and not backgrounds as it may seem on first glance.The issue was due a bad RAM in the row of eight devices, they acts as sprites line buffer.

  • I'm pretty sure the issue is due a bad RAM (or more) in the row of eight devices located on the opposite side of edge connector, they should do the line buffer.Try to do piggybacking or replace them (from pictures I can see some have been already socketed)

  • Glorious Irem M72 multi

    caius - - Apocalypse's Projects

    Post

    Next step is that 'rtw' will ask you to send the chip to Team Europe (or someone else able) and they will read the ROM out of the MCU using the process I have described in my previous post, that's all.

  • Glorious Irem M72 multi

    caius - - Apocalypse's Projects

    Post

    Obviously you can't read secured i8751 MCUs straight with a standard programmer.But you can do it only after erased the security bit with UV exposure.Team Europe successfully did it many times and also Porchy recently.This is obviously valid only for chip where you can remove the top or the lid and obtain access to the die.See posts below for further details of the process : team-europe.blogspot.com/2019/…apping-mcu-from-1943.html jammarcade.net/choplifter-mcu-dumped/ This is a dangerous process…

  • It's normal for these CPUs to get very hot especially on Namco System 1 hardware where I believe they do a lot of calculations.

  • The '502' is one of the few Konami custom ICs I didn't yet reproduced.So far I have succesfully done and tested the '501' and 503'.Lately I've also done the '082', '083' and '504' and I'm waiting for the boards from manufacturer. I have a bootleg of Time Pilot with a '502' replacement board, anyway I think design is not complete and will not work on other boards.The '502' can be found on few PCBs, refer to this spreadsheet (credits to 'mattosborn' on KLOV forum) docs.google.com/spreadsheets/d…eo…

  • Quote from Wataru: “@caius Thanks for the extensive reply. So would you be able to supply me with one of your replacement HK-1000 in order to fix it? Regards. ” Yes, I do have availability of my 'HK-1000' reproduction.Please, send me a PM.

  • I guess this is your board : ebay.com/itm/Toaplan-jamma-tp-…nc&_trksid=p2047675.l2557 The 'HK-1000' handles all inputs including coin, service, test and tilt switches.It also handles coin counters and lockouts.Some people here used improperly the term "coin counter" but they wanted to actually mean the "coin switch" (the one that activates the credits by grounding PIN 16 parts-solder side of JAMMA edge connector).Here's is a "coin counter" (which only needs to count how many coins have been inse…