A chip supports 4-screen if it has additional VRAM. But such info(whether a chip has VRAM or not) is not included in the NESDev wiki.
I'm currently using Mapper 85(Konami VRC7) in a hacking project. The 2 original games which used VRC7 didn't use 4-screen at all, and the nametable mirroring control bits only support H-, V-, and 1-screen.
So does VRC7 actually support 4-screen mirroring? Emulation for VRC7 4-screen mirroring on Nestopia works fine, but I'm still curious.
I'm currently using Mapper 85(Konami VRC7) in a hacking project. The 2 original games which used VRC7 didn't use 4-screen at all, and the nametable mirroring control bits only support H-, V-, and 1-screen.
So does VRC7 actually support 4-screen mirroring? Emulation for VRC7 4-screen mirroring on Nestopia works fine, but I'm still curious.