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TSROM dono for TLROM game?
https://forums.nesdev.com/viewtopic.php?f=28&t=14007
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Author:  darknezz19 [ Mon Mar 28, 2016 1:26 pm ]
Post subject:  TSROM dono for TLROM game?

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

Author:  tokumaru [ Mon Mar 28, 2016 1:48 pm ]
Post subject:  Re: TSROM dono for TLROM game?

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.

Author:  darknezz19 [ Mon Mar 28, 2016 6:13 pm ]
Post subject:  Re: TSROM dono for TLROM game?

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

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

Author:  tokumaru [ Mon Mar 28, 2016 6:51 pm ]
Post subject:  Re: TSROM dono for TLROM game?

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?

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

They are?

Author:  getafixx [ Mon Mar 28, 2016 7:21 pm ]
Post subject:  Re: TSROM dono for TLROM game?

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.

Author:  darknezz19 [ Mon Mar 28, 2016 7:28 pm ]
Post subject:  Re: TSROM dono for TLROM game?

I appreciate your gentlemen.

Edit: I spell good. Thanks guys:)

Author:  tepples [ Tue Mar 29, 2016 4:31 am ]
Post subject:  Re: TSROM dono for TLROM game?

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).

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