Talk:INES Mapper 156
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the split chr hi/lo registers seem to be:
lo: 8 bits hi: 1 bit, d0
borrowing from the vrc2/4 article:
CHR Select 0 low($C000), high($C004)
$C004 $C000 7 bit 0 7 bit 0 --------- --------- .... ...H LLLL LLLL | |||| |||| | ++++ ++++- Low 8 bits +-------------- High bit of 1 KiB CHR bank at PPU $0000
this info was taken from the fceu source for the mapper and inspected in the debugger with general's son running