Hyperkin FC Mobile (portable NES clone)

Jagasian · Post by **Jagasian** » Wed Apr 30, 2008 7:10 pm

I bought a Hyperkin FC mobile off of Ebay. It plays NES games without an adapter, and it uses 3x AA batteries. It works pretty well, and it is fairly well built for a famiclone. Considering that there is no portable NES built using real Nintendo ICs, I am willing to put up with the inaccuracies of cheap NOACs. Anyway, does anybody else have one of these?

blargg · Post by **blargg** » Wed Apr 30, 2008 9:38 pm

Cool, looks decently constructed. Now if only NES cartridges weren't filled with so much hot air:

EDIT: woah, just noticed the A/B button axis is 90 degrees turned from what works best with one's thumb.

dXtr · Post by **dXtr** » Thu May 01, 2008 4:26 am

Read about these the other day looks pretty cool.
How is the battery time and accuracy?

MottZilla · Post by **MottZilla** » Thu May 01, 2008 6:05 pm

The accuracy is the same as all NES-on-a-Chips. As far as I know there is only one such NOAC, thus you should know the problems by now.

NotTheCommonDose · Post by **NotTheCommonDose** » Thu May 01, 2008 6:18 pm

How can you tell?

peppers · Post by **peppers** » Thu May 01, 2008 6:36 pm

looks almost just like a pocket fami

BMF54123 · Post by **BMF54123** » Thu May 01, 2008 8:04 pm

NotTheCommonDose wrote:How can you tell?

Play Super Mario Bros. If everything sounds completely wrong, it's the same old NOAC.

(I forget exactly what's wrong with it...something like the duty cycles are backwards on the square channels)

dXtr · Post by **dXtr** » Fri May 02, 2008 2:38 am

MottZilla wrote:The accuracy is the same as all NES-on-a-Chips. As far as I know there is only one such NOAC, thus you should know the problems by now.

True, just had this hope that some company would actually care enough to make a better NOAC.

Post by **tepples** » Fri May 02, 2008 4:21 am

Maybe someone needs to make a rom that plays beautiful music on an NES or most emulators but says insulting profanity on something with switched duty cycles. I could almost see how that would be implemented.

Bregalad · Post by **Bregalad** » Fri May 02, 2008 5:51 am

Then feel free to do it, but I'd have trouble how you would do it without detecting the NOAC from another way. Switched duty cycles change the timbre, but don't change the music heard. It can it now way sound completely different, uless the programm play something completely different.

Post by **tepples** » Fri May 02, 2008 7:33 am

Bregalad wrote:I'd have trouble how you would do it without detecting the NOAC from another way. Switched duty cycles change the timbre

And if I switch duty cycle 8000 times a second, I get sampled sound playback. If I toggle between volume=14, duty=25% and volume=7, duty=50% on an NES, the signal should be relatively quiet, toggling between 3.5 and 3.5 perhaps with some momentary upper-frequency glitches. (I haven't tried this yet.) But if the same writes produce volume=14, duty=50% and volume=7, duty=25% on an NOAC, I would probably get 7 and 1.75.

but don't change the music heard.

How accurate are the NOACs on length counter emulation?

It can it now way sound completely different, uless the programm play something completely different.

Or unless the success music is so quiet that the other stuff would mask it in a failure, much like the blue channel in a red-green color blindness test.

rbudrick · Post by **rbudrick** » Fri May 02, 2008 7:58 am

Well, there was a recent famiclone w/ SNES too that played CV III and pretty much everything else. Seems they are finally making better noacs.

-Rob

Bregalad · Post by **Bregalad** » Fri May 02, 2008 9:47 am

Hey, what you say sound fun. So a rom will play insults on Square Wave 1 which are audible on a NOAC, but not on real hardware, and a music in Square Wave 2 that are audible on a real hardware, but not on a NOAC ?

Well, there was a recent famiclone w/ SNES too that played CV III and pretty much everything else. Seems they are finally making better noacs.

Well, because it plays CVIII doesn't mean it is really accurate. It just means that the PPU fetches are probably not too far from the real ones.

rbudrick · Post by **rbudrick** » Sun May 04, 2008 1:59 pm

Bregalad wrote:Hey, what you say sound fun. So a rom will play insults on Square Wave 1 which are audible on a NOAC, but not on real hardware, and a music in Square Wave 2 that are audible on a real hardware, but not on a NOAC ?
Well, there was a recent famiclone w/ SNES too that played CV III and pretty much everything else. Seems they are finally making better noacs.
Well, because it plays CVIII doesn't mean it is really accurate. It just means that the PPU fetches are probably not too far from the real ones.

Yes, I know. I just meant it is clearly newer and likely more accurate. I hear pretty much every game works for it.

-Rob

NotTheCommonDose · Post by **NotTheCommonDose** » Mon May 05, 2008 4:57 pm

BMF54123 wrote:
NotTheCommonDose wrote:How can you tell?
Play Super Mario Bros. If everything sounds completely wrong, it's the same old NOAC.

(I forget exactly what's wrong with it...something like the duty cycles are backwards on the square channels)

Wait a minute. Is it like those NES multipacks in the malls with a N64 type controller that have Super Shrek Bros. on it?