TSROM dono for TLROM game?

A place that you can discuss reproduction of classic titles or "licensed-for-reproduction" homebrew for personal use.

Moderators: B00daW, Moderators

Forum rules
1. NO BLATANT PIRACY. This includes reproducing homebrew less than 10 years old, with the exception of free software.
2. No advertising your reproductions, with the exception of free software.
3. Be nice. See RFC 1855 if you aren't sure what this means.
Post Reply
darknezz19
Posts: 71
Joined: Wed Aug 26, 2009 8:28 am

TSROM dono for TLROM game?

Post by darknezz19 » Mon Mar 28, 2016 1:26 pm

Would the board have to be rewired or is just removing or disabling the 8K PRG RAM enough?

User avatar
tokumaru
Posts: 11465
Joined: Sat Feb 12, 2005 9:43 pm
Location: Rio de Janeiro - Brazil

Re: TSROM dono for TLROM game?

Post by tokumaru » Mon Mar 28, 2016 1:48 pm

The vast majority of games will work fine even with the 8KB of PRG RAM present... IIRC, only a couple of games specifically test and reject the PRG RAM. Rewiring, on the other hand, is always necessary for memory chips larger than 64KB, because the pinouts never match those of Nintendo's mask ROMs. You have to do the exact same rewiring job regardless of whether the donor is a TLROM or a TSROM.

darknezz19
Posts: 71
Joined: Wed Aug 26, 2009 8:28 am

Re: TSROM dono for TLROM game?

Post by darknezz19 » Mon Mar 28, 2016 6:13 pm

These are on INL boards so I assume the rewiring isn't needed.

Man, why are NES so much more complicated than SNES boards><

User avatar
tokumaru
Posts: 11465
Joined: Sat Feb 12, 2005 9:43 pm
Location: Rio de Janeiro - Brazil

Re: TSROM dono for TLROM game?

Post by tokumaru » Mon Mar 28, 2016 6:51 pm

darknezz19 wrote:These are on INL boards so I assume the rewiring isn't needed.
Well, we don't normally use the word "donor" for INL boards. Are you repurposing an INL board that already contains a TSROM game?
Man, why are NES so much more complicated than SNES boards><
They are?

User avatar
getafixx
Posts: 362
Joined: Tue Dec 04, 2012 3:28 pm
Location: Canada

Re: TSROM dono for TLROM game?

Post by getafixx » Mon Mar 28, 2016 7:21 pm

If it's a TSROM INL board then you should be able to run any TLROM game, without any modification. The PRG-RAM shouldn't cause any issues, unless he has his mapper set up in an odd way... But I doubt it.

darknezz19
Posts: 71
Joined: Wed Aug 26, 2009 8:28 am

Re: TSROM dono for TLROM game?

Post by darknezz19 » Mon Mar 28, 2016 7:28 pm

I appreciate your gentlemen.

Edit: I spell good. Thanks guys:)

tepples
Posts: 21746
Joined: Sun Sep 19, 2004 11:12 pm
Location: NE Indiana, USA (NTSC)
Contact:

Re: TSROM dono for TLROM game?

Post by tepples » Tue Mar 29, 2016 4:31 am

darknezz19 wrote:why are NES so much more complicated than SNES boards><
You mean the CHR ROM, mapper, and WRAM?

Because of compromises made to keep the NES Control Deck cheap and games flexible. These include a severely undersized video RAM (for which CHR ROM and mirroring are expected to compensate) and main RAM (for which WRAM compensates), no convenient raster IRQ, no general purpose DMA, and memories that outpaced the address space.

By the Super NES era, the cost tradeoffs differed, making cartridges mostly just a ROM or two unless they include battery RAM (common) or a coprocessor (less common).

Post Reply