Recent content by caius

Thanks.Yes, I sell them on eBay and Tindie.

Recently I've been contacted by a couple of arcade collectors, both had a not working 'Prehistoric Isle in 1930' PCB (a shooter game originally developed and published by SNK in 1989) with a problem regarding a custom IC marked 'SNK IO'.In one PCB the chip was faulty, in the other it was...

'The Thing' , the FM Towns Marty FDD emulator, will be for sale very soon.I will do here a dedicated thread with pre-order list.Thanks for your intererest.

Hi, I have reproduced this part.Contact me if you need one.Thanks.

Is It the surface mounted one?

This new set has been added to MAME : https://github.com/mamedev/mame/commit/85755f9a572527c55bb010f45f33adcc38daed7b#diff-25a6634263c1b1f6fc4697a04e2b9904ea4b042a89af59dc93ec1f5d44848a26

You misunderstood what @ShootTheCore said.He asked if CRC32 of his dumps match yours (and not if your dumps match the old MAME ones) CRC32 of the OBJ2U dumped by him matches your dump, plaese see snap attached from archive of your dumps.

OBJ2U CRC32 matches the new dump, OBJ2L does not. Anyway, MAME dev said that he tried to load the new dumps under MAME and he gets a lot of GFX issue.He will compare now the dumps to see which are the differences.

Dumps have been sent to a MAME dev for further analysis.

'The Thing' will be soon for sale, recently the project undergone a re-design : https://caiusarcade.blogspot.com/2021/11/the-thing-fm-towns-marty-fdd-emulator.html?m=1 I can put you on a pre-sale list if you are interested.

The capacitor involved in /RESET circuit should be the tantalum one @C21, try to replace it.

Yes, it draws much current.

Keep in mind this PCB has a long booting sequence during which it sits on a black screen for several seconds.I have a Twin Cobra I thought it was dead but then I found it was perfectly working.

Is the '056602' on Konami DJ-MAIN hardware?From the picture on this page I can see four '056602' : http://www.system16.com/hardware.php?id=826 Anyway, regarding the reproduction, please contact me in in PM.

If there are jailbars then the problem is in data bus of sprites circuit.Assuming that the object ROM board is good (no broken traces, good ROMS and logics, good connection with motherboard, etc..) you should draw the sprites generation circuit to figure out what processes the data from...