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Author Topic: Gimmick repro with sunsoft 5PB  (Read 65966 times)
Pit
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« on: November 13, 2013, 02:19:07 PM »

Hi,

Im' currently making my own repro of Gimmick! for famicom. Firstly, I'd like to thank MWK and 80's Freak for helping me when I started involved in this reproduction.

My repro based on a sunsoft FME-7 game is in work in progress. Also, I bought an other sunsoft game : Dodge danpei, to make a second repro.

And what a surprise when I opened the shell :




A sunsoft 5B Cry.

Well, I made research on the web and found that page with a scheme to make 5B support Gimmick sounds : link


I also found Drakon's posts, who made a gimmick repro with a japanese gremlins 2 having a sunsoft 5B, but links of photos are dead.

I'm gonna give this repro a try, my "issues" for now are :

- PRG maskrom is 28 pins, I have to adapt a 27C020 which is 32 pins. I think the PRG maskrom is from Nintendo, I've checked with my multimeter and the pinout corresponds.

- CHR rom might be from sunsoft, so I think no redirections on pins will be needed.


Does anyone else have done this mod ?



mod edit: fixed really long link
« Last Edit: November 26, 2013, 12:19:17 PM by UglyJoe » Logged
80sFREAK
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« Reply #1 on: November 13, 2013, 09:57:00 PM »

IIRC you might need to cut some "ribs" in the shell to fit 32pin chip, otherwise it's just standart rewire procedure.
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Pit
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« Reply #2 on: November 14, 2013, 06:21:50 AM »

Ok thanks Cheesy.

With the multimeter I found the PRG maskrom was with nintendo pinout, so I have crossed all pinouts informations and made a scheme of connection :



A17 of the 27C020 need to be wired to the sunsoft 5B pin 32.

Also, on the dodge danpei PCB pin 2 of sunsoft 5B is grounded, it confirms that it has to be lifted.


For the CHR maskrom, the pinout is the same as eproms. I think a 27C1001 will be good.
« Last Edit: November 19, 2015, 09:32:35 AM by Pit » Logged
famifan
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« Reply #3 on: November 15, 2013, 06:48:22 AM »

- PRG maskrom is 28 pins, I have to adapt a 27C020 which is 32 pins. I think the PRG maskrom is from Nintendo, I've checked with my multimeter and the pinout corresponds.

- CHR rom might be from sunsoft, so I think no redirections on pins will be needed.
CHR comes with JEDEC compliant pinout, no rewiring needed

PRG as usual comes with 32->28 pin nintendo compatible pinout. Nesdev wiki really helps
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Pit
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« Reply #4 on: November 15, 2013, 07:57:50 AM »

Thanks for confirmation Smiley.

Yes Nesdevwiki helps, I made my scheme with it.

I've edited my scheme in my last post, with EPROM A16 that goes to the maskrom pin 22.

So I need :

- PRG : 27C020, rewiring on the scheme,
- CHR : 27C1001, no rewiring.

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Pit
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« Reply #5 on: November 26, 2013, 11:36:07 AM »

News !

I got my gimmick repro with 5B chip work, but I don't have the extra sounds. I'll checked the sound circuit I built in the cartridge, but I was wondering if I would have to mod my Nes too.

I'm using my nes toaster with added famicom slot, and a enio exp board. With the powerpack I have the extra sounds, not with my gimmick repro.

Edit : I have to mod the 60-72 pin converter, by wiring pin 46 (60 pins edge) to pin 54 (72 pins edge). Will try tonight Bub

Post Merge: November 26, 2013, 05:32:49 PM
Ok, now it fully works Smiley. I lade the mod on my 60-72 pins adapter and all the sounds are here.



Thank you again famifan, 80's freak and MWK Smiley.
« Last Edit: November 26, 2013, 05:32:50 PM by Pit » Logged
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« Reply #6 on: November 26, 2013, 05:34:28 PM »

Can you start making some more? Smiley
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« Reply #7 on: November 26, 2013, 06:36:50 PM »

Way to go Pit! Congratz Starman Starman Starman
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P
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« Reply #8 on: November 26, 2013, 06:55:34 PM »

Good job on that! Smiley
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80sFREAK
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« Reply #9 on: November 27, 2013, 03:29:26 AM »

@Pit, all looks good. Tidy, no hot glue involved. Just noticed pin1 on PRG chip is missing, but IIRC it's NC anyway.

Can you start making some more? Smiley
Unfortunately 5B based Dodge Danpei or whatever it was are not that common, so AY chip required.
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famifan
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« Reply #10 on: November 27, 2013, 08:01:12 AM »

EVERY1ATTN
Special Offer
Exclusively for FamicomWorld

Famicom 5B lottery: purchase 10x of Dodge Danpei and participate in sunsoft 5B hunting with non-zero probability Grin

More purchases are making higher your chances!

Friendly cost for already registered famicomworld member is low as $19.99 per cart.
Also, a premium version contains Gremlins2 is also available only for $39.99 per cart.  Pacman Hurry up! Link
Limited stock Lips Sealed
Starting on Dec, 1st Cool
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Pit
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« Reply #11 on: November 27, 2013, 11:35:39 AM »

@Pit, all looks good. Tidy, no hot glue involved. Just noticed pin1 on PRG chip is missing, but IIRC it's NC anyway.

I noticed that PRG pin 1 was not connected on dodge danpei 2 and barcode world, so I made the same with this mod.

PRG pin 2 is also connected to 5V.

For the sunsoft 5B, I lifted pins 2 and 3, pins 27 and 32 are not traced so no need to lift it.
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Pit
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« Reply #12 on: December 04, 2013, 01:16:20 PM »

Hey, I'm currently makin a second repro with a sunsoft FME7 (dodge danpei 2).

I put the eproms, but the game does not boot. I tried another set of eproms, no boot... I put the Pal version to test, it boots...

So the question is : will the japanese version of gimmick boot without the AY and the LS chips ?

Edit : Seeing the AY chip connections to the eprom, I think Japanese gimmick will not boot without AY chip, AY chip is a part of the mapper needed to make the game work ; am I right ?
« Last Edit: December 04, 2013, 02:28:10 PM by Pit » Logged
famifan
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« Reply #13 on: December 04, 2013, 05:15:56 PM »

sigh

i can't recall what type of gimmick i have on my fme7 based barcode donor repro.

Post Merge: December 04, 2013, 05:17:53 PM
Edit : Seeing the AY chip connections to the eprom,
AY chip needs a connection to data/adress bus. Nothing special i guess
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Pit
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« Reply #14 on: December 04, 2013, 05:24:08 PM »

Ok, so japanese Gimmick should work without AY ? I tried many eproms, verified my CHR and PRG files, the game does not boot Sad.

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