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Thank you everyone!

I understand, but $E000-$FFF9 is embedded with DPCM sfx, so the less code possible, the less noticeable difference in the sound being initiated.

So, could I have $FFFC-$FFFD goto $E000, set bit 6 of $8000, then jsr to within $C000 to load the rest of the reset vector/mapper setups?

My reset vector is within $C000. Thats where it originaly is in its MMC1 form, and currently with my MMC3 hack. Im not familiar with the bells and whistles of other emulators. Could you explain how I perform this on Nintendulator? Im not home right now, and I dont have my notes with me, so I cant ge...

Im working on an MMC1 to MMC3 conversion. Im using FCEUX 2.2.1 as my debugger, and this conversion works perfectly on FCEUX, but the rom wont boot on a powerpak/Nestopia/Nintendulator. Nestopia keeps giving me a cpu jam in the log file, but it doesnt give an origin for the issue/illegal opcode. I ra...

As the title states. Could anyone please point me in the right direction to obtaining the latest/up to date build?

Thank you!

original release thread
http://acmlm.kafuka.org/board/thread.php?id=7810

v6
http://acmlm.kafuka.org/uploader/get.php?id=4580

Thank you everyone for your help.

I need to preserve the original left bits, while being able to properly compare then alter the right bits. I hope that makes sense.

@Shiru, your example worked thank you!

One more question How do you compare a bit? Id like to see if a hex value matches #8, and if it does, to branch to whatever i want.

In my routine, I am able to load a register, use AND, and the value is changed. But after that, ill do the same with another register, and the value does not change.... Example LDA $70 ;46 is in $70 AND #$F0 ;i use this for checking bits, I want to make the (6) in the value (46) to 0, so now the val...

Here is my updated patch set. I also included an mmc1 doc, im no expert, but ive had some success.

http://acmlm.kafuka.org/uploader/get.php?id=4475

Ill try again then, thank you!

Edit. Just to clairify in the clearing of registers 2 & 4, and the setting of registers 3 & 5, thats for $8001 correct?

Edit 2 - Works! Got the rom cycling through the different mirrorings! Thank you for the explaination!

Thank you for the info.