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Author:  coinheaven [ Fri Oct 07, 2005 9:16 am ]
Post subject: 

why does it say Zelda is a SNROM. shouldnt it be a UNROM?

Bregalad wrote:
coinheaven wrote:
wow that is an awesome list.

Oh my god, it isn't. This list looks very unaccurate. This place seems better : http://www.parodius.com/~veilleux/boardtable.txt

Author:  Quietust [ Fri Oct 07, 2005 11:46 am ]
Post subject: 

coinheaven wrote:
why does it say Zelda is a SNROM. shouldnt it be a UNROM?


Because Zelda 1 IS SNROM!

Author:  coinheaven [ Fri Oct 07, 2005 3:24 pm ]
Post subject: 

WHY!???

Quietust wrote:
coinheaven wrote:
why does it say Zelda is a SNROM. shouldnt it be a UNROM?


Because Zelda 1 IS SNROM!

Author:  Quietust [ Fri Oct 07, 2005 3:34 pm ]
Post subject: 

Because Zelda 1 uses an MMC1, required for it to handle SAVED GAMES; a standard UNROM board is not capable of supporting extra memory at $6000-$7FFF, while an SNROM board is designed exactly for this purpose.

Author:  coinheaven [ Mon Oct 10, 2005 7:48 am ]
Post subject: 

oh ok, so does anybody know how to check for this? i use VirtuaNES memory viewer, but i dont know how to check for it. some games it has numbers like 5A and sometimes there are just FF's all across from $6000 $7fff. any help on this would be great!

Quietust wrote:
Because Zelda 1 uses an MMC1, required for it to handle SAVED GAMES; a standard UNROM board is not capable of supporting extra memory at $6000-$7FFF, while an SNROM board is designed exactly for this purpose.

Author:  Bregalad [ Mon Oct 10, 2005 10:06 am ]
Post subject: 

Well, VirtuaNES has a header viewer where the mapper number is shown. So if it says MMC1, it's MMC1, not UNROM. If it says UNROM, it is most likely a UNROM game, but it can also be a hacked version of a MMC1 game, like FF2 [hM02]. Just see what GoodNES says about your ROM. If it says [hMxx], then you have the wrong mapper.
The memory viewer trick was to know if a game that has not battery has SRAM or not, so you can see if it uses SRAM or not (if it's all $ff, there is no SRAM). Scince both Zelda and FF2 uses battery, this means that there is SRAM anyway.

Author:  coinheaven [ Mon Oct 10, 2005 10:39 am ]
Post subject: 

ok i get it now, if it has a battery then it has to have SRAM, so this would be all the zeros. but if it doesnt then it is all $ff. is that correct? i needed this info because i am checking the games for SRAM that dont have a battery to determine what board they would need. Thanks

Bregalad wrote:
Well, VirtuaNES has a header viewer where the mapper number is shown. So if it says MMC1, it's MMC1, not UNROM. If it says UNROM, it is most likely a UNROM game, but it can also be a hacked version of a MMC1 game, like FF2 [hM02]. Just see what GoodNES says about your ROM. If it says [hMxx], then you have the wrong mapper.
The memory viewer trick was to know if a game that has not battery has SRAM or not, so you can see if it uses SRAM or not (if it's all $ff, there is no SRAM). Scince both Zelda and FF2 uses battery, this means that there is SRAM anyway.

Author:  Bregalad [ Mon Oct 10, 2005 11:20 am ]
Post subject: 

If would not be all zeroes, it would be the data the games writes to the SRAM chip.
The board is identical regardless of if there is battery or not (for example both Kid Icarus and Zelda are SNROM, but only Zelda have a battery, Kid Icarus's slot for battery and two diodes are just empty).

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