Talk:MMC5

Don't Repeat Yourself failure

Ok, it's crazy to have two completely different pages explaining the MMC5 mapper, one on iNES mapper 5 and the other on MMC5. I think the info should be present on a single page (like it is for all other mappers).

Well in fact it seems it's Zeromus who added Dish's notes on all iNES mapper pages. This would be nice if the info wasn't already present on the wiki - having twice the same info isn't very logical is it ? I don't know what to do but something should probably be changed...Bregalad 00:36, 23 March 2012 (PDT)

Disch' format is much better for reading. Funny, I was really thinking to discuss about such thing. :) --Zepper 14:44, 23 March 2012 (PDT)

Problem solved. @Zepper : If there is a particular point that should be improved about how the mappers are presented on the wiki, then please change it (or at least say more precisely what is much better).Bregalad (talk) 06:02, 20 April 2015 (MDT)

MMC5-internal RAM

What is the logic in the ASIC that causes it to write zero if the PPU is not rendering? --Zzo38 01:51, 22 September 2012 (MDT)

Another question about the ExRAM is, what happens when you try to read/write ExRAM nametables through the PPU registers, and if extended attribute mode is selected, what happens when reading/writing attribute tables using the PPU registers (when it isn't rendering the picture, and in any potentially random order)? --Zzo38 (talk) 22:23, 24 February 2014 (MST)

Yet another question : Is the ExRAM battery backed ? It would seem no, but technically the Battery is connected to the MMC5 so who knowns ? Bregalad (talk) 04:38, 5 May 2014 (MDT)

Even more extended PRG RAM

Parsimony of silicon strongly implies that the higher address lines (corresponding to the 0x78 bits of the register) are still driven for the registers from $5114 to $5116 even when RAM is selected, meaning >64KiB PRG-RAM would be usable when mapped to $8000-$DFFF. It's conceivable that these same bits of the register at $5113 (controlling PRG-RAM bank) are implemented, since they have to feed a multiplexer anyway. Something to test, maybe. —Lidnariq (talk) 23:34, 20 January 2014 (MST)