Search found 22128 matches

by tepples
Thu Feb 10, 2005 10:00 pm
Forum: NES Music
Topic: MIDI tips?
Replies: 8
Views: 8798

I can see how a 1/4 or 1/8 duty square wave would sound like a sawtooth wave; it adds the even harmonics that are lacking in the square wave. Likewise, a triangle wave is equivalent to a square wave with an integral applied, and an integral just boosts the low frequencies. But to many listeners, MID...
by tepples
Thu Feb 10, 2005 8:32 am
Forum: General Stuff
Topic: Grandtheftendo bummer
Replies: 16
Views: 14239

I'd pay up to $100 for a working devkit including a Famiclone, adapters to connect it to an NTSC TV and to 115VAC, a rewritable cart, and the hardware needed to rewrite it.
by tepples
Wed Feb 09, 2005 12:12 pm
Forum: General Stuff
Topic: Grandtheftendo bummer
Replies: 16
Views: 14239

Memblers wrote:Famicom on the other hand, is huge. FC clones are still being made
Where can one buy a decent Famiclone in the United States without having to buy a pirate multicart along with it?
by tepples
Wed Feb 09, 2005 10:29 am
Forum: General Stuff
Topic: Grandtheftendo bummer
Replies: 16
Views: 14239

Anonymous wrote:Speaking of Maxicarts, why do the Atari guys get all the cool homebrew hardware and games these days?
Because frontloaders have a lockout chip, and many frontloader owners are reluctant to open their NES console and cut pin 4.
by tepples
Wed Feb 09, 2005 10:27 am
Forum: NES Hardware and Flash Equipment
Topic: Squeedo: The Flash Cart prototype
Replies: 55
Views: 32896

Re: Hacking common mappers

how easy is it to hack existing Famicom/NES games with common simple mappers, so that they can run on the Squeedo? If there was a tool that could auto-hack common games to run on the Squeedo, that would help sell lots of Squeedos No, it would help Nintendo shut the project down for contributory cop...
by tepples
Tue Feb 08, 2005 7:00 pm
Forum: NES Hardware and Flash Equipment
Topic: Insert cartidge with EPROM sockets in the NES
Replies: 12
Views: 8283

Tried a toploader?

If you use a frontloader, not only do you have to remove the metal bar in order to use socketed chips, but you also have to snip pin 4 of the lockout chip in order to use a custom PCB without either the Macronix/Color Dreams/Camerica charge-pump method or a Nintendo key chip desoldered from a $1 fle...
by tepples
Sat Feb 05, 2005 6:48 pm
Forum: NESemdev
Topic: Single screen again
Replies: 4
Views: 4905

I guess it was just an anal-retentive desire to document whether the original cart hardwires GND or VCC to CIRAM A10.
by tepples
Sat Feb 05, 2005 10:57 am
Forum: NESemdev
Topic: me again with a soundoutput question
Replies: 11
Views: 8328

If you need to output a "centered" waveform, you should output 0 for silence and +/- VOL when the wave is playing. It may not perfectly represent the waveform coming out of a real NES, but it will sound almost exactly the same. Not with the "Hello" demo that uses the square wave channels as a faux ...
by tepples
Sat Feb 05, 2005 10:50 am
Forum: General Stuff
Topic: Grandtheftendo bummer
Replies: 16
Views: 14239

He said that he didn't like the CHR bankswitching for sprites or something. ie, he wanted to bankswitch sprites in less than 1KB chunks The Final Fantasy games for Famicom used VRAM for fine-grained bankswitching. For something more graphically intense, I think someone needs to make a mapper that a...
by tepples
Sat Feb 05, 2005 10:07 am
Forum: NESemdev
Topic: Single screen again
Replies: 4
Views: 4905

Toss your four-directional scrolling screen in the lower nametable and the status bar in the upper nametable, and then use the mapper to switch between them.

But for the UNIF mapper chunk, which describes what is hardwired, I don't exactly see much of a point.
by tepples
Tue Feb 01, 2005 9:49 pm
Forum: NESemdev
Topic: illegal opcodes?
Replies: 7
Views: 7856

A certain Disney aquatic character...

Too bad that name was taken.
by tepples
Mon Jan 31, 2005 6:13 pm
Forum: NESdev
Topic: CNROM software (bus conflicts)
Replies: 12
Views: 11365

Although, I'm sure just because they don't know exactly when [$2002.d5] occurs, it was ignored in their emulator (think about not allowing horizontal scrolling because of not knowing when to load the h-scroll counter, course that's exaggerated as horizontal scrolling is vital). Difference is that t...
by tepples
Sun Jan 30, 2005 8:52 am
Forum: NESemdev
Topic: $2002.5
Replies: 8
Views: 7038

In a "scanline based" engine, how do you handle MMC2 (Punch-Out!!) or MMC4 (Family War)?
by tepples
Sat Jan 29, 2005 8:32 pm
Forum: NESemdev
Topic: $2002.5
Replies: 8
Views: 7038

James wrote:I just added the option of enabling/disabling the 8 sprite limit in my emulator today for this reason. By default, I draw all sprites, since it eliminates a lot of flickering in some games.
At which PPU cycle does your emulator fetch pattern table data for sprites beyond the 8th?
by tepples
Sat Jan 29, 2005 6:41 pm
Forum: Newbie Help Center
Topic: questions about SRAM
Replies: 8
Views: 6345

M2 or Phi2 is one of the clock signals on the NES board.