Search results

Did you burn the DDP P1 ROM as it is prepared by my script? The normal Mame ROM is encrypted, as it is used on PCBs that pass the M68k bus through the ASIC.

(bump, see update above.)

New PCB day! Got version 1.1 of the breakout board. Now I need some time to test the audio and video circuits, and make any required adjustments before finalising the layout. (I already found that my Scart footprint needs some tweaks...)

The last time I searched for matching ferrite beads for another another project I didn't find anything. The product number didn't come up anywhere, and there was no explanation which specs were required. If you can desolder the capacitor you can use something like this (random ebay and...

Also you've got to spend money on development, prototypes and manufacture, which is something many people underestimate... Right now I don't need a proper one, but I may get back to you if I get the adapter designed.

No kidding, they're expensive. I assume this is the correct type: https://www.digikey.co.uk/product-detail/en/sullins-connector-solutions/GBB91DHHD-S621/GBB91DHHD-S621-ND/1464519 (And you've got to buy at least 10...) Too much for the dumping/testing jig I had in mind, but maybe this is useful...

By the way, is there a good source for the slot connector, or a way to bodge an existing connector to at least read the address/data part?

Cool, that matches what I copied from the minigun schematic. I may have to shuffle the connectors a bit so it looks neat, but the design isn't final anyway.

I noticed they are just using libusb0, so I was always wondering if you could just use https://zadig.akeo.ie/ . Though if they have a certificate now this is not necessary any more.

Do you have a link with the pinout? Does it have AC-Coupling capacitors in the cable, or do they need to be on the board? (Just a quick update: I am waiting for PCBs, I ordered the new JAMMA breakout board and a test version of the A/V circuit.) Edit: Copied pinout and stuff from...

That's why I was asking... If I understand the CIC system correctly there are two (three) security methods: - a NES/SNES style cipher stream, without which the console locks up - a header checksum which is game specific - some additional challenge system used by later games At the moment: - the...

Interesting... so which CIC is now actually used, the one from the original card or from the n64 card?

I guess for the EEPROM you could use another microcontroller that implements the serial interface and stores the data in internal EEPROM or Flash memory, or translates for an external i2c EERPROM or SD card.

I seem to remember hearing that the arcade version of the N64 uses a higher clock speed. Is that this board, or am I getting confused at my old age? By the way, found at least one seller: https://www.aliexpress.com/item/32835667519.html https://www.aliexpress.com/item/32816166068.html You've...

As usual, I guess they got cloned CIC, or CIC from cheap sports games. There is also a clone of the CIC code for PIC or Atmel microcontrollers. https://github.com/mikeryan/UltraCIC Here are pictures of the two games I bought (Sin & Punishment and Bangai-O):

There is a Chinese seller selling replica N64 carts on AliExpress. He uses a variant of this circuit to translate the N64 bus protocol for normal flash chips: https://github.com/hww/N64-Cartrige/blob/master/doc/SCH Circuit.PDF (Don't use the PCB dimensions from that site, they are quite a bit...

Is this one of those "3V chips in a 5V system" cases? Also, I don't see any bypass caps installed...

I just saw this on eBay, is this someone from here, or someone known? I was tempted to get it to look at it, but at that price I might as well get a Darksoft multi.

Just wondering, are game sorted by size? I wonder if you could optimise the layout to minimise product terms. Edit: Also, game-ids don't need to be continuous if you change the menu, which would probably allow some optimisations as well.

As I'm less experienced with this, what is the problem with NAND Flash? Too slow? You seem to get quite high capacity ones.