FDS on PowerPak

loopy · Post by **loopy** » Sat Oct 25, 2008 5:28 pm

Another update. Automatic disk switching is implemented, more games should work now. Writing isn't done yet. If a game tries to save, it will probably fail.

theNESadvantage · Post by **theNESadvantage** » Sun Oct 26, 2008 6:42 pm

Awesome! Super Mario 2 (Lost levels) on the NES! Thanks a lot loopy

loopy · Post by **loopy** » Sun Oct 26, 2008 7:15 pm

Ok, saving is fixed (it won't save back to CompactFlash though). Most games should be playable now.
Bug reports welcomed.

rbudrick · Post by **rbudrick** » Mon Oct 27, 2008 8:12 am

That's awesome, loopy!

When you say saving is fixed but it won't save to the Compact flash, it sounds contradictory. Could you explain what you mean?

Thanks!

-Rob

loopy · Post by **loopy** » Mon Oct 27, 2008 8:55 am

When a game saves, it's only writing to a disk image in RAM, not to the card.

BMF54123 · Post by **BMF54123** » Mon Oct 27, 2008 12:13 pm

I have an idea...maybe the existing SRAM-saving code in the boot ROM could be modified to save changes to the FDS image? All it would need to do is copy from PRG-RAM to .NES, instead of SRAM to .SAV.

It would likely require bunnyboy's involvement/source code, though, and most people don't have a means of updating the boot ROM...

MottZilla · Post by **MottZilla** » Mon Oct 27, 2008 1:34 pm

I imagine games that require you to switch sides to continue (such as Zelda) don't work right? Since Zelda runs the attract mode until you insert a disk opposed to waiting for you to push Start and then requesting a disk side change.

loopy · Post by **loopy** » Mon Oct 27, 2008 4:46 pm

Zelda works just fine. I have the "disk inserted" status bit always toggling, so any game waiting for a disk change should get triggered.

2600 · Post by **2600** » Tue Oct 28, 2008 5:38 pm

Do you plan on releasing the source files? I'm curious how much logic it takes up and whether it would fit on a CPLD project.

Zepper · Post by **Zepper** » Tue Oct 28, 2008 6:14 pm

2600 wrote:Do you plan on releasing the source files? I'm curious how much logic it takes up and whether it would fit on a CPLD project.

I would be interested about the "logic" emulating the $4xxx registers. What about the BIOS?

Jedi QuestMaster · Post by **Jedi QuestMaster** » Thu Oct 30, 2008 5:32 am

I am really interested in trying this out when I get back home. Has anyone tried out V.S. ExciteBike?

Jeroen · Post by **Jeroen** » Thu Oct 30, 2008 9:14 am

what does vs exitebike have to do with fds?

MottZilla · Post by **MottZilla** » Thu Oct 30, 2008 10:49 am

VS ExciteBike is on the FDS system. He didn't mean the arcade NES thing.

RGB_Gamer · Post by **RGB_Gamer** » Thu Oct 30, 2008 11:41 am

I got this working and it's pretty awesome to play FDS on NES (especially now that my NES is RGB modded with audio adjustment knobs). I do wish the FDS sound channels were implemented (a good example is Doki Doki panic where the sound effect when lifting things is missing).

I am curious on why saving doesn't seem to work for me. I played a couple of levels of Castlevania, and as a test, I died on purpose giving me the save option which it did. Chose my save file after the title screen and it worked. But turning off the game seems to not save it to the FDS image.

Lord Nightmare · Post by **Lord Nightmare** » Thu Oct 30, 2008 8:27 pm

loopy wrote:Ok, saving is fixed (it won't save back to CompactFlash though). Most games should be playable now.
Bug reports welcomed.

LN