Yes there's this one:getafixx wrote:Was there any test roms for use with any of the VRC mappers?
https://forums.nesdev.com/viewtopic.php ... 16#p203716
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Yes there's this one:getafixx wrote:Was there any test roms for use with any of the VRC mappers?
If true of the licensed VRC2 also, that's weird... it would contradict Konami's documentation that says that it's present across the entire region.krzysiobal wrote:(I tested the pirate VRC2 = 23C3662 and it seems to also have the mirroring reg only at $9000)
H, V フラグレジス夕にテ一夕を書き込むには, 9000H~9FFFHを使用します.
D0 (H, V) 切リ換え) 0:H, 1:V
thank you.krzysiobal wrote: ↑Tue Jan 05, 2021 3:40 pm This is your PCB.
If only one game can be selected, writing to latch (74161) does not work.
Either because
1) the /RESET pin is held in,
2) write signal is not generated properly.
My suspect is that the value of capacitors you have soldered (C1, C4) are incorrect.
C1 should be 1n-10n
C4 should be tens of pF (56pf or 68pf)