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In [url=http://forums.nesdev.com/viewtopic.php?p=128190#p128190]this post[/url], caitsith2 wrote:You might want to move that to another unused mapper slot, as 30 has been used already, by UNROM 512. I am going to suggest moving over to Mapper 31.

I have a couple of questions about UNROM-512, which I post here because I have found no other thread with the answer. I hope rainwarrior does not get offended by this small hijack of the topic (I promise I won't go OT anymore after these )

1. am I correct that mapper 30 + no battery in header = unflashable setup, while mapper 30 + battery in header = flashable setup?
2. is Battle Kid 2 using the FLASH at all?
3. is Study Hall the only program using the board in flashable mode?

[Looks like a perfect place for a split --MOD]

1. Correct on both counts.

2. Battle Kid 2 is not using the flash at all. In fact, the only part of the board it is using, in the oversize UxROM bit. I have however created a hack that takes advantage of the flash capability. Taking advantage of it on the real cart, requires modding it though, (specifically adding the components to enable self-flashing, then actually dumping the cart, applying the IPS, and flashing the changed version back onto the cart.) (I plan to mod my #31 of 33 LE cart with this. ) (hack source code)

3. Currently, Study hall is the only cart for sale that is using the board in self-flashable setup. However, the XMAS 2013 cart, which is a different board, is also self-flashable, in exactly the same way. (The main difference with the XMAS 2013 cart, is that any writes from 8000-BFFF turn on/off LEDs, otherwise, the board functions identically to unrom512.)

thanks a lot for the replies.
I will give a try to support the flash saves (probably after I fix the problems with EEPROMs in Bandai games) and your patch will help definitely to test the effect of the emulation.

Does he still sell these? Can not locate them on the site.