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Have updated post #150 with details of this latest cart. We really need to come up with some better way of numbering these cart versions, the latest "v3" (as stated on label and menu) is actually v7 by our reckoning :D Also, just noticed the latest version cart now has 11F16XE mcu, haven't...

This was to be a pm reply to Vortex but i'll put it here for the interest of others, perhaps other people here have experience with these STC chips? Regarding the stc, as far as I could make out there's no way to dump it, so there's no code to examine, it's a case of writing a new firmware from...

Great work done by @Vortex :thumbup: Shame I never had the time to go further with this, but looks like it's been going well, will be interesting to see the "compile any set of games" utility! If it also spits of cpld and STC code, and the same STM dev board can be used to program those chips...

For what it's worth i've been running several 10M (and even an 8M ;) ) 68k's at 12M for years (both PLCC and DIP versions), never had one fail yet. Also a lot of cps1 bootlegs have 10M 68k's running at 12M and again, i've never seen one with dead cpu yet (and i've seen a lot of them). If you...

CPS changer hardware maps some buttons differently, I run sfzch on standard cps1, hacked the rom to change the mapping to normal (use coin1/2 for pause etc.) Haven't done wofch but assume it'd be equally easy to do, then you can just use the normal sequence 3,2,1,4,5,6,3 and not worry about...

I've decided to collate details of the various known versions, any additions/corrections welcome... v1 https://www.mvs-scans.com/index.php/Multigame_161_in_1_Series_1 "revision 1" https://wiki.neogeodev.org/index.php?title=161-in-1_Series_1#Version_1...

That would be absolute worse case scenario for me :evil: Don't even want to think how many hours I burnt figuring out those big chips, would definitely not want to go through it all again if some other weird chips start turning up ;)

Just checking in to say... had stuff going on for last 6 months or so, had to put this on the back burner, should be able get back into it soon (hopefully ;)) Those new 20200216 v10 boards look interesting, can't say i'm suprised they've dropped the big chip for P, it was a waste - over half...

@Talking_Sword the pinout is here somewhere in this thread, the command set is same as S29GL512. Get S29GL512 datasheet, it has commands for 2 modes, word or byte, use byte but double the command for both byes of the word, (internally it's effectively got 2 S29GL512 in byte mode) I don't think...

I think the green shell and AES carts are clones, doesn't look like same manufacturer to me... Not unusual with this kind of thing, no honour among thieves with the bootleggers :D

That's what we're calling a version 4, which seems to be the latest version so far. My cart is a v2 but having compared with pics of v3/4, the only significant change seems to be the different type M and S chips. (I don't currently have a solution fo reading/writing those but they're fairly...

Agreed, all-flash approach is best, there's some Chinese sellers list them, I will order some and see what happens. @rcboosted yes with custom firmware it should be possible to rewrite the cart anyway you see fit, whatever games you want. I won't be selling anything myself, I'll eventually put...

Should be possible for P and V, unfortunately for C the data lines just go directly to the cart slot, not to the cpld, so not possible. Actually that would be far easier than reverse engineering this one ;) The only show stopper is not being able to get big enough flash chips, of course...

Been a while since last post, lots has happened... I'm reasonably sure i've figured out just about every detail of this thing now ;) Can now confirm 100%: game configs are hard-set in the cplds mcu just saves/loads softdips settings and issues a reset pulse to master cpld on power-up, no other...

Been looking into the STC MCU side of things... Turns out there's some info out there, nothing on this particular part, but a few snippets about similar STC stuff, mostly the STC89C52RC. Thought i'd just post up what info I've found out so far... STC11F08XE STC MCU Limited, China...

There's plenty empty space in all the roms, the only ones approaching full capacity are C but even they have about 40MB free, so enough for those 3 games. I think it's most likely they ran out of gates in the master P cpld, each game is unique 8 product term equation, plus all the other stuff...

Here's something interesting... been looking in depth at the 68k menu code, found hidden menu entries for the unused games and with a little tweak it's possible to make it draw the full list :D So at some point in development they must of had plans for at least 166 games. Strange thing is...

These are EPM3256A 144-pin, so no 7000 or Atmel equivalent unfortunately. I'm happy to erase them, just not yet, as I need them working for the moment (for more testing). I would have liked some replacements just so I could keep the originals as is, then the cart can always be put back to...

Yes, there's a few extra games in the P dump, there's no graphics or sound and no way to select them, so not of any use. Just an interesting curiosity :D There's masses of empty space in the P chip, only about 400MB is used, less than half the chip, so I guess they didn't really need to worry...

Can't use NAND directly in an application like this, it needs to be "managed" by a controller of some sort due to the more complex bus, lack of random-access etc. It's only really used in stuff with an OS and a proper file system to manage bad blocks etc. Parallel NOR on the other hand is super...