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Apocalypse

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An old project.
I started a thread on neo-geo.com about it:
AES to MVS (plays AES games on MVS)

But I experienced the same DS experienced: drama, drama, and... drama, so I left.

Anyway the converter has been ready for more than 1 year and a half now.
Fluxcore, which is a member here has seen it working in one of its final steps of conception.

I join few pics of it:













And a video:

View My Video
 

Apocalypse

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nice!

Would be nice to see a consolized dual slot MVS with the second slot adapted for AES carts ;)
Hehe, it's a reality actually. I made a small circuit which redirects signals for AES based on the SLOTCS signal.
So you can dedicate only one slot to AES on 2/4/6 slots.
Very nice work! Hats off to you!
Thanks :)
 

fluxcore

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Did you manage to fix up the sprite errors at the edges? Last I remember you had a bunch of theories but hadn't sorted it out...
 

Apocalypse

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how much? releasing the pcb files etc? whats the skinny?
Humm... There isn't any PCB files, schematics were made bare hand, and the prototype is 100% hand made too (with hundreds of jumper wires).
It's been a while but I can probably try to find my notes and scan them.
Did you manage to fix up the sprite errors at the edges? Last I remember you had a bunch of theories but hadn't sorted it out...
Yes, IIRC I had to generate a 12 MHz signal which is 90° in advance compared to the OG 12 Mhz clock and also has a 75% duty cycle instead of 50%.
 

Darksoft

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Now is when I fall off the chair and wonder again. Why so much talent and effort must go down the loo? Please send those scans and a video of it working please. If we can pledge towards you converting those scans into proper Schematics, so that other users can have it, I'm all in :thumbup:

Let's make sure that this is made available for the community to enjoy :)
 

werejag

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okc, ok
Now is when I fall off the chair and wonder again. Why so much talent and effort must go down the loo? Please send those scans and a video of it working please. If we can pledge towards you converting those scans into proper Schematics, so that other users can have it, I'm all in :thumbup:

Let's make sure that this is made available for the community to enjoy :)
yes please we can design the pcbs and do a bare board run
 

Apocalypse

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and a video of it working please
There's one in the first post.

Only difference between MVS and AES is the sprite ROMs de-multiplexer (NEO-ZMC2) being on the motherboard on MVS and in the cartridge for AES.
And obviously a different cartridge pinout.

The PROG board is completely passive and only reroutes signals to the right pins from AES to MVS.
CHA board is mostly passive and require only little circuitry for the C ROMs decoding.

I've found only few of my notes but I'm pretty sure all the information is still on the neo-geo forum.
Here's the schematics of the small daughterboard.
Schematics.JPG

Some more info from my notes:

H: reverse bits of pixel = horizontal flip => must be always low in the converter
EVEN: swap pixels A/B => must be always low in the converter

12M signal to the AES cart must be NOT(12M)
LOAD signal to the AES cart must be NOT(12M) OR 24M

2 pins have to be lifted on the MVS motherboard: LOAD and H.
 

Darksoft

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@Apocalypse Thanks for sharing this. If someone else can copy paste the rest of information at the other forum that'd be appreciated.
 

Apocalypse

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I found a document I used for development but of course my printer (which is also a scanner) refuses to work :cursing:
I've tried everything (rebooting printer, rebooting computer, reinstalling drivers, using USB instead of WiFi)...

I HATE COMPUTERS
I really do...
 

Darksoft

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I know the feeling.

Have a cup of tea and try another computer :)

And remember...if it works... don't touch it.
 

Apocalypse

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Ok, managed to scan it:



IIRC yellow means there a direct equivalence between AES and MVS on the same connector and same side.
Blue means there's a direct equivalence but on the other side of the connector (thus vias are needed).

CR0/CR2/CR4/CR6 are tied together and connected to GAD0
CR1/CR3/CR5/CR7 are tied together and connected to GBD0
CR8/CR10/CR12/CR14 are tied together and connected to GAD1
CR9/CR11/CR13/CR15 are tied together and connected to GBD1
CR16/CR18/CR20/CR22 are tied together and connected to GAD2
CR17/CR19/CR21/CR23 are tied together and connected to GBD2
CR24/CR26/CR28/CR30 are tied together and connected to GAD3
CR25/CR27/CR29/CR31 are tied together and connected to GBD3
 
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