Note: Bit 3 in Byte 6 of iNES header would be usually Four-Screen flag, but, for this mapper it is used as One-Screen flag.
The VA10 connection does, of course, also affect the CHR-RAM mapping at 0000h-1FFFh. BLK1 would be the most common case (1K NT plus 1K CHR-RAM). BLK0 would allow to swap CHR RAM via Port 2000h.Bit3-4. Two-Screen would allow to use two NTs (and to squeeze CHR data into unused NT areas). Two-Screen would also allow to use 2K OBJ tiles (when leaving BG unused).
Note: 1K CHR-RAM allows to use as much as 64 tiles of 2bpp (or, with suitable color attributes, 128 monochrome tiles of 1bpp).
Also note that the PPU.A13 variant can be adequately emulated as AxROM provided the program never writes to $8000-$FFFF and is marked as having 1024 bytes of CHR RAM in NES 2.0.

没看内容，wiki抄了一份.有没有同样board的游戏可供参考?查了下百度基本没什么相关的信息

我不懂的是为毛添加了还要说是原作者添加的？

nesbbs的马甲发威了

哀其不幸怒其不争啊，雪龙二修改的模拟器在国产游戏ROM的适应性上还是有优势的，可惜仍是站在巨人肩膀之上，没有能力编写属于他自己的模拟器