bus/nes: Added support for Chinese translations of Genghis Khan, Squa…

[0kmg]

…re's Tom Sawyer, and Tenchi wo Kurau II.

Software list items promoted to working (nes.xml)

Dàtáng Fēngyún VI Dài (China)
Chéngjísīhán (China)
Fēngsè Huànxiǎng (China)
Tāngmǔ Lìxiǎn Jì (China)
Tenchi wo Kurau II - Shokatsu Koumei Den (China)
Tenchi wo Kurau II - Shokatsu Koumei Den (China, alt)
Tūnshí Tiāndì II (China)
Tūnshí Tiāndì II (China, alt)
Tūnshí Tiāndì II (China, alt 2)
Tūnshí Tiāndì III (China)

[0kmg]

The bottom six items listed above are all variants of Tenchi wo Kurau II. I left the descriptions somewhat as they were before, save for obviously incorrect things like one or the other being in simplified or traditional script. I can't tell you anything about them except they appear identical and differ in relatively few bytes. It's probably the case that there are a couple of genuine carts represented there, but I can't possibly sort them out any more than this at this point.

[0kmg]

Also, note there's a change in the general MMC3 code to a sneaky line that had writes to extra work RAM going to both the battery and non-battery-backed RAM. I don't think there are any MMC3 (or clone) games with both types of RAM so this change should be okay™. The parallel read function returns only one or the other for obvious reasons, so it also makes sense to have the default write behavior be the same. (There are also other instances of this dual RAM write issue in the NES slot code that should be cleaned up but are probably harmless at the moment due to the rarity of boards with multiple types of work RAM.)