PowerPak NSF mapper file size limit.

B00daW · Post by **B00daW** » Tue Nov 30, 2010 8:06 pm

It appears that the PowerPak NSF mapper does not load NSFs larger than 128K. Anyone else experiencing that problem?

http://dl.dropbox.com/u/9435923/music/nsf/t2000-5.nsf
http://dl.dropbox.com/u/9435923/music/nsf/Turrican2.nsf
http://lmao.rotfl.at/upload/B00daW/strobe-ziberia.nsf

The first two NSFs are quick and dirty conversions with SuperNSF by Syniphas.

The last NSF works well on Nintendulator and was composed by Strobe with a hacked version of FamiTracker with DPCM bankswitching.

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Talked to loopy_ over IRC and found out the answer. Turns out that PowerPak has a maximum of 512K PRG RAM with a minimum size of 8K banks; making a max NSF file size of 256K. By doubling up the 256K RAM from 4K banks to 8K banks, it's able to play the NSF due to hardware limitations. This is what I've gathered.

Jarhmander · Post by **Jarhmander** » Tue Nov 30, 2010 8:48 pm

A 128K-sized(!) NSF is pretty massive IMO...

tokumaru · Post by **tokumaru** » Tue Nov 30, 2010 9:12 pm

ENTIRE Sonic 3 & Knuckles OST in VRC6

The guy had to break it into 2 NSF file apparently... One of them is larger than 128KB.

naI · Post by **naI** » Wed Dec 01, 2010 5:02 pm

tokumaru wrote:ENTIRE Sonic 3 & Knuckles OST in VRC6

The guy had to break it into 2 NSF file apparently... One of them is larger than 128KB.

I played both NSFs on my PowerPak. Worked fine.