Open Source Cartridge Megacart PCB Creation compatibility

[duduche]

Hi,
Here I have made PCBs of this card and I would like to know if there is a problem with:
Super space acer (128k)
Pac-man collection (128k)
Mario Bros. (128k)
Boxxle (64k)

Well I use with the 27C2001 pcb, I tested with Princess Quest (256k) and it works fine.

Is there a problem with the GAL20V8 with 128k roms in a 256k eprom? I don't have a 27C1001 in stock yet for test.

Or
Is there a problem with the 4 games mentioned on a basic collecovision?

Will the super game module be offered again in the near future? Or in DIY?

Thanks.

 

 

 

[Tursi]

Mario's only 64k. SSA is a beta but should run fine on hardware, but I'd prefer the beta not be distributed much since the full version is coming out soon.

 

[duduche]

Yes Mario is 64K.

I just tested black-onyx-the-2013 (64K) and zombie-near-2012 (128K) on 27C2001 and it doesn't work.
Are the 64K and 128K ROMs a problem on a 27C2001 with the GAL?

Only Princess-Quest (256K) works.

Or do all others need the super game module.

Tursi :
For SSA, nothing indicates that it is a beta on cvaddict.com. Or for the games tested that the game module is necessary.

Thanks.

[Tursi]

6 hours ago, duduche said:

Tursi : For SSA, nothing indicates that it is a beta on cvaddict.com. Or for the games tested that the game module is necessary.

It's posted there without my permission. I never authorized any cross-posting of my binaries. But people do what they want.

(Edit: here's my development thread: https://forums.atariage.com/topic/149476-super-space-acer/ )

 

None of my games require the SGM. Super Space Acer will support the extra audio, but doesn't require it.

 

Edited June 18 by Tursi

[duduche]

Super space acer (128k)
Pac-man collection (128k)
Mario Bros. (64k)
Boxxle (64k)

black-onyx-the-2013 (64K) 
zombie-near-2012 (128K)

work fine on AtariMax Ultimate SD.

I absolutely have to test 128K on 27C1001.

[duduche]

ssa20230629 (256K) works fine on 27C2001.
any ideas why ssa (128k) doesn't work on 27C2001 ? Bank management ?

[duduche]

The startup bank is on the last 16 KB of the ROM? That's it ?

[duduche]

Yes, this is it.

[Tursi]

2 hours ago, duduche said:

The startup bank is on the last 16 KB of the ROM? That's it ?

That's normal for a megacart ROM, yeah.

 

27C2001 is only a 128K EPROM, so it's a bit strange you would have the 256k ROM working and not the 128K one. Did you mean the other way around?

 

 

[duduche]

27C1001 : 128K
27C2001 : 256K but to work, I must add 128K+128K, blank+128K or 128K+blank doesn't work. 64K+64K+64K+64K doesn't work perhaps 64K+64K on 27C1001. I'm waiting to receiv them.
27C4001 : 512K not compatible with SST39SF040A (A18<->Vpp)