I have PCB for M27C801 swap bin datas.
I use every time "SwapBin" method to my ROM files with SNES ROM Utility and program it with TL866.

All works great!
Now I would like to use 27C040 EPROM for 4Mbit games on the same PCB, but I dont understand why it's dont works?
I tried two methods without success :
1 - Program directly .smc files without passing by SNES ROM Utility to make SwapBIN.
2 - Do SwapBIN with SNES ROM Utility to my 4Mbit file even if its writing for M27C801, see here:

I dont understand, cause if I see here, the pinout is the same like in M27C801, see here:
