flashmasta savegame fix

[fbfiso]

I've experimented the Biomotor Unitron crash with the patched ROM on my NGPc.
I didn't tried the unpatched ROM as you said it was the same.

The crash occurs after a short animation. I don't think I'll try to track it as it seems rather complex and the bug isn't much annoying.

It's running fine on either Neopop or RACE, that makes the tracking harder. To fully understand the problem, it may be necessary to modify the ROM to add some techincal display on the handheld screen to compare the values with emulator.

However, it's an odd case you've found...

Ed, Thor, or others, any idea about that case ?

Sorry for bump your old reply.
As kickerofelves said, I reproduced his crash in option on both unmodified and modified ROM. After set the message speed to low and pressed B, the door close animation played and code crashed. And if the battery is replaced, and boot the NGPC again, the boot system setting menu shows up.

I mention this because it seems the code erased the boot system setting. So is it possible that the block erase/write operation require more timing cycles on flashmasta(which the FPGA implementation caused) and the code in game software write too quick before the actual hardware is ready and start waiting write end signal(which will never happen since the write command happened too quick, no actual write operation started or write to the wrong place like system setting area)? So will some no-op code inserting before actual write command issue help solve this problem.

I have no idea on NGPC programming, I just once dealed with similar problem on a genesis unlicensed cartridge that require several nop instruction after save data bank switch or it will not be able to save. But NGPC uses flash chip. I have no idea if there will be similar things happen on such hardware.