Talk:Comparison of Nintendo mappers: Difference between revisions

From NESdev Wiki
Jump to navigationJump to search
No edit summary
No edit summary
Line 59: Line 59:
<nowiki>*</nowiki> the Vs System distributed its original games as five or six 8 KiB ROMs, and decoding on its mainboard allowed banking of CHR like [[CNROM]]. It is a little disingenuous to claim that 0 ICs were necessary for banking since the same functionality is not possible on a Famicom, however, banking was incrementally free.
<nowiki>*</nowiki> the Vs System distributed its original games as five or six 8 KiB ROMs, and decoding on its mainboard allowed banking of CHR like [[CNROM]]. It is a little disingenuous to claim that 0 ICs were necessary for banking since the same functionality is not possible on a Famicom, however, banking was incrementally free.


----
 
== Mapper Wizard ==


I don't really like the mapper wizard (for one thing it doesn't seem to mention how much PRG RAM you need, and doesn't have a lot of choices), which is one of the reasons why I made [[User:Zzo38/mapperlist]]. However, that list is incomplete; can you help with it? Perhaps more information would be useful in there too, such as the number of 74xx series ICs, etc, and then we can improve it and use that list of mappers to make up a lot of things, such as SQL queries to select one, or a wiki article listing them in various tables, etc. --[[User:Zzo38|Zzo38]] ([[User talk:Zzo38|talk]]) 17:25, 23 June 2013 (MDT)
I don't really like the mapper wizard (for one thing it doesn't seem to mention how much PRG RAM you need, and doesn't have a lot of choices), which is one of the reasons why I made [[User:Zzo38/mapperlist]]. However, that list is incomplete; can you help with it? Perhaps more information would be useful in there too, such as the number of 74xx series ICs, etc, and then we can improve it and use that list of mappers to make up a lot of things, such as SQL queries to select one, or a wiki article listing them in various tables, etc. --[[User:Zzo38|Zzo38]] ([[User talk:Zzo38|talk]]) 17:25, 23 June 2013 (MDT)
:Have you seen [[User:Lidnariq/MMC3_Variants]] ? In any case, if you want more than 8KiB PRG-RAM, your only choices are MMC1 and MMC5. Period. Also, I'm really not clear what's up with the template stuff you've put on your userpage there; it makes it completely illegible. —[[User:Lidnariq|Lidnariq]] ([[User talk:Lidnariq|talk]]) 17:57, 23 June 2013 (MDT)

Revision as of 23:57, 23 June 2013

Rare discrete logic

This table describes the mappers as they existed, as opposed to any obvious oversize extensions.

You probably don't actually want to use these.

iNES Chips Max PRG PRG bank size Max CHR CHR bank size Mirroring PRG RAM? Bus conflicts?
11/144 1 128 32 128 8 V/H hardwired No Yes
NINA-001 (34) 6 64 32 64 4 + 4 V hardwired Yes No
36 ? 128 32 128 8 V hardwired Unlikely Likely
38 2 128 32 32 8 V/H hardwired Impossible No
70 3 256 16 + 16F 128 8 V/H hardwired No Likely
72 4+speech 256 16 + 16F 128 8 V/H hardwired No Yes
77 4 512 32 32 + 6RAM 2 4 No Likely
78a 5 128 16 + 16F 128 8 V/H switchable No Yes
78b 3 128 16 + 16F 128 8 1 No Likely
79 2 64 32 64 8 V/H hardwired No No
86 3+speech 128 32 64 8 V/H hardwired Impossible No
87 2 32 32 8 V/H hardwired Impossible No
89 (2)† 128 16 + 16F 128 8 1 No Yes
92 5+speech 256 16F + 16 128 8 V/H hardwired No Yes
93 (2)† 128 16 + 16F 8‡ V/H hardwired No Yes
94 2 128 16 + 16F 8 V/H hardwired No Yes
96 3 128 32 32RAM 4 + 4F / 16 V/H hardwired No Likely
99 0* 40 8 + 24F 16 8 4 No No
101 2? 32 32 8 V hardwired Impossible No
140 3 128 32 128 8 V/H hardwired Impossible No
152 3 128 16 + 16F 128 8 1 No Likely
168 7 64 16 + 16F 64RAM 4F + 4 V hardwired No No
184 (3)† 32 32 4 + 4 V/H hardwired Impossible No

† Mappers 89, 93, and 184 exist as a single IC, however their functions are trivially described using a small number of 7400-series ICs, and likely contain multiple silicon dice that were wire bonded together in the same package.

‡ Mapper 93 is technically the same 89 other than mirroring, but it only commercially existed using 8kB of CHR-RAM

* the Vs System distributed its original games as five or six 8 KiB ROMs, and decoding on its mainboard allowed banking of CHR like CNROM. It is a little disingenuous to claim that 0 ICs were necessary for banking since the same functionality is not possible on a Famicom, however, banking was incrementally free.


Mapper Wizard

I don't really like the mapper wizard (for one thing it doesn't seem to mention how much PRG RAM you need, and doesn't have a lot of choices), which is one of the reasons why I made User:Zzo38/mapperlist. However, that list is incomplete; can you help with it? Perhaps more information would be useful in there too, such as the number of 74xx series ICs, etc, and then we can improve it and use that list of mappers to make up a lot of things, such as SQL queries to select one, or a wiki article listing them in various tables, etc. --Zzo38 (talk) 17:25, 23 June 2013 (MDT)

Have you seen User:Lidnariq/MMC3_Variants ? In any case, if you want more than 8KiB PRG-RAM, your only choices are MMC1 and MMC5. Period. Also, I'm really not clear what's up with the template stuff you've put on your userpage there; it makes it completely illegible. —Lidnariq (talk) 17:57, 23 June 2013 (MDT)