2013: 1GBPpW :( :( Noisewave ROM (Page 8 of 9)

There are two problems.
1) The ROMs need to be aligned. With a cat command you have to take care of this manually, or unaligned ROMs will simply fail to load. This is not very hard to add to patcher application.
2) For the menu return function, you need to find the button read procedure, some free space in the ROM and patch it for the button detection and then do a sequence of writes to the cartridge to restore it to its original state and jump back. This is a little more difficult, but not super difficult. And different ROMs may need slightly different treatment.
However I still need to spend the time doing it, including making a sensible GUI and so on. With a cat command, all the "error handling" is the task of the user, not the code. Together with save data handling, which I want to finish together with this, it becomes a bigger project.

Thanks I appreciate it but as of now I don't really see any huge need to have that option. I do really appreciate the offer though!

As far as the save data goes, what exactly does that entail? Is it simply manually telling the cart where in sram you want the savs to go and then essentially cramming them all together? Almost like a bookmark, just remembering where each sav is located? Or is it far more complex than that? (That's way too many questions in one paragraph to not be annoying, sorry!)

Interesting side note, when testing this on my super gameboy I noticed that when I'm booted into one of the other roms through littlefm and I do a reset with the super nintendo, it reboots the sgb and boots directly into the rom I previously was in. I'm assuming this is because it doesn't fully kill power to the cart. It does come in handy when nerdrix starts glitching out on me!

Oh yeah sorry, I understand that. I was mostly looking for a sample of what you'd have to do. Or really just any more information. But I PM'ed you.

Ok, brief explanation on how to do it, but then you're on your own. Create a file that is a 1 bar loop. Convert it to 8 bit unsigned mono and 32768 samples long. Hint on the last part, making it exactly 1 second long and then converting it to 32678 Hz sample rate should at least get you close. You might need to manually trim or add a couple of samples with a hex editor. If you're adding samples, repeat the last sample value in the file or so. (Who ever said this was supposed to easy?)
Run the following Python script. It will convert the file you've created to the 4-bit format the Gameboy so much craves and create a new ROM with your sample.

def fourbit(x):
    return ord(x) & 0xf0

def fatconv(fn):
    f = open(fn + ".raw", "rb")
    x = f.read()
    f.close()

    if len(x) != 32768:
        print "File should be 32768 samples long, yo. 8-bit unsigned mono is where it's at, dawg. Raw with no header. (That's what bshe said.)"
        return

    g = open("amenizer.gb", "rb")
    gb = g.read(16384)
    g.close()


    y=map(fourbit,x)
    y=zip(y[0::2],y[1::2])

    #f = open(fn + "-conv.bin", "wb")
    g = open(fn + "-rom.gb", "wb")
    g.write(gb)

    for i in y:
        #f.write(chr(i[0] | i[1]>>4))
        g.write(chr(i[0] | i[1]>>4))

    f.close()

fatconv("filenamehere")

However, the final version of this application, when it comes out, will surely blow your minds. Just a prediction.

Hahaha that actually sounds awesome. I wish I could make sounds that cool on purpose!

the slicetest is wicked, any plan to add button controlled/ 1chn sequencer slice triggering?
that woul be siiiick. expecially with midi in sync, and yeah further out into hopefullness a way to change the sample.

good work anyhow