Search found 394 matches

by loopy
Fri Oct 18, 2019 3:01 am
Forum: NES Hardware and Flash Equipment
Topic: Why are Famicom Disk Systems so picky?!@...
Replies: 10
Views: 5130

Re: Why are Famicom Disk Systems so picky?!@...

http://3dscapture.com/junk/FDSStick_debug_20171229.exe Use a known good disk (written by a properly calibrated drive) for adjusting your drive. Preferably a real commercial disk, not bootleg/copied. Push the "Test" button to scan a disk. The software shows a graphical representation (blue wavy line...
by loopy
Thu Apr 04, 2019 12:17 pm
Forum: NESemdev
Topic: Famicom Disk System emulation
Replies: 17
Views: 14363

Re: Famicom Disk System emulation

byuu wrote:Oh boy. The wiki needs some serious updates, then. I'll also add:
The wiki is crap. Brad Taylor's .txt file (linked at the bottom of the wiki) is much more useful.
by loopy
Sat Mar 09, 2019 6:07 pm
Forum: NES Hardware and Flash Equipment
Topic: The state of PowerPak mappers
Replies: 32
Views: 16725

Re: The state of PowerPak mappers

You're free to use the code however you like, consider it public domain.
by loopy
Fri Mar 08, 2019 2:24 pm
Forum: NES Hardware and Flash Equipment
Topic: FDSStick (256M version) software question
Replies: 6
Views: 7282

Re: FDSStick (256M version) software question

That code on github is ancient, it's not compatible with the current firmware. I can put up something more current, it might take a few days though.
by loopy
Mon Mar 04, 2019 1:44 am
Forum: NES Hardware and Flash Equipment
Topic: The state of PowerPak mappers
Replies: 32
Views: 16725

Re: The state of PowerPak mappers

It's been ages since I've gone over the powerpak MMC3 code, but I'll dig it up if there's something that needs fixing. I have MMC3A,B,C carts I can test on if needed.
by loopy
Thu Feb 14, 2019 5:05 pm
Forum: NES Hardware and Flash Equipment
Topic: Oversize FDS disk images
Replies: 39
Views: 28461

Re: Oversize FDS disk images

The largest Game Doctor image I have is 66458 bytes (and that's really pushing the limits). The largest Game Doctor game I've seen is 12 sides. I guess 13, if you want to count the saver disk -- some Game Doctor devices do save states which adds another disk, I don't know if you want to accomodate t...
by loopy
Mon Feb 11, 2019 6:05 pm
Forum: NES Hardware and Flash Equipment
Topic: Oversize FDS disk images
Replies: 39
Views: 28461

Re: Oversize FDS disk images

They are just cartridge games ported/hacked to run from disk (that was the purpose of Game Doctor after all). I'm not aware of any original games made specifically for game doctor hardware. There's nothing special about the disks themselves (aside from the size), they follow the standard FDS disk fo...
by loopy
Wed Feb 06, 2019 3:51 pm
Forum: NES Hardware and Flash Equipment
Topic: Oversize FDS disk images
Replies: 39
Views: 28461

Re: Oversize FDS disk images

Even if you're right, why make a format that relies on a bunch of assumptions? Simpler solutions exist, I don't know why you're doubling down on this point.
by loopy
Wed Feb 06, 2019 2:15 am
Forum: NES Hardware and Flash Equipment
Topic: Oversize FDS disk images
Replies: 39
Views: 28461

Re: Oversize FDS disk images

Welp, you asked for opinions, you got mine. I'm a fan of KISS.
It's your thing, do what you like. As you said, it's for your own emulator and not likely to see adoption anyway so go nuts and make a FDS 2.0.
by loopy
Wed Feb 06, 2019 1:59 am
Forum: NES Hardware and Flash Equipment
Topic: Oversize FDS disk images
Replies: 39
Views: 28461

Re: Oversize FDS disk images

*shrug* Inconvenience of multiple files, or inconvenience of another new unsupported (except in your own emulator) format. I prefer the former, personally... Every Game Doctor and Magicard disk still uses the \x01*NINTENDO-HVC* disk header, so I do not follow. If a game happens to have 0x01,0x2A in...
by loopy
Wed Feb 06, 2019 12:20 am
Forum: NES Hardware and Flash Equipment
Topic: Oversize FDS disk images
Replies: 39
Views: 28461

Re: Oversize FDS disk images

If they are Game Doctor images, why not release them as such? (*.A, *.B, etc) To reach the next side, advance 65,500 bytes from the start of the current side, then further until \x01\x2A (begin of block 1) is found" This doesn't seem very safe to me. Since this is a bastardized .FDS format that brea...
by loopy
Wed Jan 23, 2019 12:29 pm
Forum: NESemdev
Topic: FDS modulator formula revision
Replies: 25
Views: 24546

Re: FDS modulator formula revision

I'm hoping that this was somehow an accidental surrogate for the missing bits at the bottom. It seemed strange, but it was the best model I managed to come up with at the time. Could be. Everything matches up when I look at it with a 'scope, I'm fairly confident it's right. How were you doing your ...
by loopy
Wed Jan 23, 2019 1:52 am
Forum: NESemdev
Topic: FDS modulator formula revision
Replies: 25
Views: 24546

Re: FDS modulator formula revision

Is it missing the different rounding if counter < 0? It's not needed. *shrug* I think the -64 to 196 wrapping is still applied by the + 0x400 and subsequent & mask, right? Yeah. What happens at the end? Is the "temp" calculation no longer an offset, and now a multiplier? Yeah. A little math shows h...
by loopy
Tue Jan 22, 2019 3:34 pm
Forum: NESemdev
Topic: FDS modulator formula revision
Replies: 25
Views: 24546

Re: FDS modulator formula revision

MEGA-NECRO-BUMP! I've been making audio tests of my FDS over the last few days, and I've spent a lot of time trying to verify the currently used formula for modulation strength outlined in disch's old document (and currently on the wiki FDS audio page ), which always struck me as a very odd formula,...