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Great info @wickerwaka , thanks for sharing it! I checked known scanned schematics from games using this chip and pin 74 is not listed as input pin but as power pin, so it is involved for sure in DAC, as Vref or something. Also, some games list it as Vcc pin (such as Gunbuster, Double Axle) and...

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Hey! The project is currently halted due to personal circumstances, but I hope to finish it soon. After confirming the prototype worked fine and as expected, I designed a new version of the PCB, with smaller size and easier to install, avoiding all those ribbon cables to take RGB signals, and...

Nice catch, Congrats! 👍🏼 I also love Bakraid. Btw, are you able to read eproms? The Bakraid PCB you purchased is the Unlimited HongKong version which is currently undumped and would be nice to be added to MAME 😄

Yeah, I didn’t realize that the kick harness connector isn’t the only thing to take into account, but also the size of the C board having it. A small redesign of the top piece, specially making that square a bit taller and wider, which is where the C boards is placed, would work. I dunno if...

I have this one for years, hoping some day reproductions would be cheap and in same quality (not 3D printed), to use in all my cps1 boards Mine has the small bottom part, intended to be used with small mobos, but a larger one also exists for bigger ones. Games with kick harness connector on...

Hi, price for: DUNGEON MAGIC ?

Last months I was working on a dump project . In this case the tool is intended to dump the internal ROM present on some MCU devices from the Toshiba TLCS-90 series. Some NMK games, such Thunder Dragon, Hacha Mecha Figher and Double Dealer, and some other Jaleco games, such as Big Striker, use...

Curious about “Nosferatu”. You mean “Nostradamus” instead?

curious about the differences in components between korean and japanese ones. Is it just a replacement of some components to proper ones in terms of brand, values.... or there are some unpopulated/different circuit in korean one? Btw, glws

I can assure this is completely true. I saved lot of money thanks to Joko's job. Much appreciated!

yep! that one is entirely based in the previous work of @Hatsune Mike. I only designed and made a small pcb (currently in prototype status) using the same FPGA he did, and adapted the HDL code to output CGA video signal using the same original DAC from Taito. :thumbsup:

http://www.ukvac.com/forum/topic391605.html

Hi, I’m interested in two units of Reco PCB. Please, let me know when it will be available again. Thanks!

could you upload a picture of that Daioh proto pcb?

Some people out there are arguing if inserting/programming the keys every time the board boots is a good thing, and let it does every boot could be probably harmful in long-term (as the original system was not intented to be reprogrammed lots of times during it's lifetime) I think that's not...

If you plan to change the S-caps to fit the tube as @Mukuro_W stated above, you may also want to keep the total capacitance of the 2 S-Capacitors present in MS9 chassis, in order to prevent affecting the 15KHz mode working. C519 and C531 have a total capacitance of 1.15uF. If you replace one...

Heater resistance in the chassis should be different when using a Hitachi tube and a Toshiba tube. IIRC ms9-su chassis (tipically paired to Hitachi tube) has a 1.5 Ohm heater resistance. However any other ms9 chassis model paired to Toshiba tubes has a 3.3Ohm on it. Not really a problem, but...

Thanks to Joko, I saved lot of money a while ago. Buyee consolidated some items I previously purchased by my own, resulting in a stupid big package. They didn't take apart the original individual domestic shipping boxes, and they put them all into a big box. Obviously, shipping it in tha way to...

Unfortunatelly, logic comparator doesn't work with ICs with bidirectional pins (i.e. pins that are changing between acting as input or output over time). That's why you are getting inconsistent results, because the instant when some pin is acting as an input (and thus produces an output at the...