Talk:MMC1: Difference between revisions
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Rainwarrior (talk | contribs) m (→SOROM, SUROM, and SXROM: clarify that I mean they look like the same submapper, i.e. 1 submapper instead of 3?) |
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What am I missing? I can't spot the incompatibility that necessitated three submappers. Isn't this just one mapper together? - [[User:Rainwarrior|Rainwarrior]] ([[User talk:Rainwarrior|talk]]) 00:58, 8 August 2015 (MDT) | What am I missing? I can't spot the incompatibility that necessitated three submappers. Isn't this just one mapper together? - [[User:Rainwarrior|Rainwarrior]] ([[User talk:Rainwarrior|talk]]) 00:58, 8 August 2015 (MDT) | ||
Just my $2, but I 10=% agree with Rainwarrior.[[Special:Contributions/85.4.229.234|85.4.229.234]] 02:27, 9 August 2015 (MDT) | |||
Revision as of 08:27, 9 August 2015
SOROM, SUROM, and SXROM
I'm a little fuzzy about why these are considered different NES 2.0 submappers. The functionality of all three of these looks the same to me if the extra banking bits become useless/mirror when the ROM/RAM addressed is a smaller size (just like in any other mapper supporting various sizes).
43210 +---+ PSSxC
4:P - A18 of 512k PRG ROM, disconnected if smaller 3:S - A13 of 16k PRG RAM, disconnected if smaller 2:S - A14 of 32k PRG RAM, disconnected if smaller 1:x - unused 0:C - 4k CHR banking control
What am I missing? I can't spot the incompatibility that necessitated three submappers. Isn't this just one mapper together? - Rainwarrior (talk) 00:58, 8 August 2015 (MDT)
Just my $2, but I 10=% agree with Rainwarrior.85.4.229.234 02:27, 9 August 2015 (MDT)
