I got mail from Greece!
Here's the first test results:http://youtu.be/3UOQFK2TvTo
The ROM version is NTSC.
It appears that the famiclone also runs NTSC; however, it is clocked at PAL clock rate, and the PPU produces PAL signal.
The outcome is that while the game syncs properly at NTSC settings (i.e. the program accurately predicts scanline timings using the CPU clock), it runs at 83% of the speed that it should.
This is an odd combination indeed. I wonder if I should add a patch option for this combination.
Additionally, there seem to be some problems with the SRAMSave engine. The horizontal cursor does not appear, and it crashes when exiting to main menu.
Additionally, the video is really dim (even though black is sort of gray). I believe this is because of my video capture device though. It's a $20 class USB composite capture device
. I think I'll let YouTube do its magic for color correction.
Finally, software that comes with the capture card can only encode
in chroma-supersampled settings (yuv420p I believe), which means that the colors will not only suffer from composite PAL-B encoding, but they will also suffer from MPEG encoding (even worse). The small title screen texts therefore are completely illegible.
EDIT: Even though my TV could not recognize the composite signal at all, it could successfully be connected to the RF output. That looks so much better. Horribly artifacted and full of RF noise, especially when the game makes sound, but pixels are crisp. Interestingly enough the picture was also a bit dark there. I suppose it's a problem in this famiclone.
EDIT: I always forget that I lost my original NTDec in mysterious circumstances. This is just some no-brand glob-top famiclone that I got from my sister... The only thing NTDec I have is the 5-in-1 cart.
Interesting though. This famiclone has a 26.601712 MHz crystal (PAL clock rate). NTSC NES runs on 21.477272 MHz. Shouldn't the games be running 24% faster, not 20% slower? This sort of resembles a Dendy then. I wonder. Interestingly enough, the circuit board bears a marking "N̄T̄S̄C̄/PAL" (with continuous line over "NTSC").
The NTDec at least had proper chips... Too bad I didn't salvage them before I lost it.
One more peculiarity of this design is that there's a glob-top multigame cart sister-boarded into the cartridge input.
The thread strands you see on the RF board? They are actually glue strands.
I'll see about EEPROM programming in a few weeks when I have time, so I can update this thing. Again, thank you Keropi!