Search found 92 matches

by 6502freak
Mon Aug 07, 2017 1:20 pm
Forum: NES Hardware and Flash Equipment
Topic: Everdrive N8 - VRC7 Mapper with FM Sound (now full YM2413!)
Replies: 25
Views: 19339

Re: Everdrive N8 - VRC7 Mapper with FM Sound (now full YM241

Hmm, I forgot to add the necessary MAPROUT.BIN file in the archive. Please retry with the new attachment. ...and always perform a defragmentation operation on your SD card after update. EDIT: Of course, maybe I should mention that this mapper only produces audio on Famicom or modified NES consoles. ...
by 6502freak
Sun Aug 06, 2017 1:54 pm
Forum: NES Hardware and Flash Equipment
Topic: Everdrive N8 - VRC7 Mapper with FM Sound (now full YM2413!)
Replies: 25
Views: 19339

Re: Everdrive N8 - VRC7 Mapper with FM Sound

Hello together, since this forum here is for HW hacks and retro developers, this big update might interest you! ...there is now a fix in inaccuracy in the modulator envelope generator!!! ... Hmm... No, that's not it... :) Well, how about the fact that the mapper now implements a full Yamaha YM2413 c...
by 6502freak
Mon Jun 26, 2017 12:59 pm
Forum: NESdev
Topic: Why only 52 colors instead of 256?
Replies: 63
Views: 11759

Re: Why only 52 colors instead of 256?

I grew up with a PC and a Playstation 1, but the NES graphics are no problem to me, even in the earliest games. Sure they might not look great but they didn't directly interfere with the development of games. 2600 graphics did. I think if there is one system whose graphics capabilities haven't aged...
by 6502freak
Mon Jun 26, 2017 12:43 pm
Forum: NES Hardware and Flash Equipment
Topic: Everdrive N8 - VRC7 Mapper with FM Sound (now full YM2413!)
Replies: 25
Views: 19339

Re: Everdrive N8 - VRC7 Mapper with FM Sound

In case anyone is still interested, here is an update:

http://s000.tinyupload.com/?file_id=316 ... 5103436729

- Envelope trigger bug fixed
- Reduced core size by 13%
- Audio volume of FM now matches APU level (at the expense of losing dynamic range for FM)

VRC7 should be now feature complete.
by 6502freak
Tue Jun 20, 2017 12:47 pm
Forum: NES Hardware and Flash Equipment
Topic: Everdrive N8 - VRC7 Mapper with FM Sound (now full YM2413!)
Replies: 25
Views: 19339

Re: Everdrive N8 - VRC7 Mapper with FM Sound

Hi,

I have uploaded a new test version:

http://s000.tinyupload.com/?file_id=000 ... 0558035973

Changes so far:

- Increased Volume
- Added a missing FM feature which nobody seems to have noticed so far... ;-)
by 6502freak
Sun Jun 18, 2017 1:51 am
Forum: NES Hardware and Flash Equipment
Topic: Everdrive N8 - VRC7 Mapper with FM Sound (now full YM2413!)
Replies: 25
Views: 19339

Re: Everdrive N8 - VRC7 Mapper with FM Sound

Very Well. BTW, Is it possible to simulate VRC7 FC Sound with a altera or xilinx cpld? The EverDrive N8 uses an Altera Cyclone II FPGA, but FPGAs are much more capable devices than CPLDs. My core is currently using 2910 LEs, which is beyond the capacity of any known "real" CPLD. Especially if you t...
by 6502freak
Fri Jun 16, 2017 12:40 pm
Forum: NES Hardware and Flash Equipment
Topic: Everdrive N8 - VRC7 Mapper with FM Sound (now full YM2413!)
Replies: 25
Views: 19339

Re: Everdrive N8 - VRC7 Mapper with FM Sound

Hi, The VRC7 board attenuates the 2A03 audio quite a bit. In that video it's balanced way too loud relatively, though probably you're going to have trouble getting loud enough output from the Everdrive to do it right. There's some reference recordings here: http://forums.nesdev.com/viewtopic.php?t=8...
by 6502freak
Fri Jun 16, 2017 4:41 am
Forum: NES Hardware and Flash Equipment
Topic: Everdrive N8 - VRC7 Mapper with FM Sound (now full YM2413!)
Replies: 25
Views: 19339

Everdrive N8 - VRC7 Mapper with FM Sound (now full YM2413!)

Hello guys, I just finished a new release of my VRC7 mapper implementation for the Everdrive N8. After some long hiatus, I finally managed to get the VRC7 /FM sound core running reasonably well! :beer: :D I have uploaded the release to the following location: http://s000.tinyupload.com/?file_id=1435...
by 6502freak
Tue Aug 31, 2010 7:31 am
Forum: NES Hardware and Flash Equipment
Topic: Is the famicom ppu the same as the nes one?
Replies: 12
Views: 6508

I'm also curious, does the dual moniter playchoice use the same ppu for both screens? I wasn't able to find a closeup picture of the pcb anywhere but from what I saw it looked like there's only just 1 rgb nes ppu on the dual moniter pcb. The second video generator is made completely from TTL chips,...
by 6502freak
Tue Aug 31, 2010 4:48 am
Forum: SNESdev
Topic: MD vs. SNES: FM vs. PCM
Replies: 77
Views: 23878

Also, I have noticed thato n MD1 the PCM is much more noisy than on MD2. So I guess there is a design flaw somewhere.... ? As far as I know, the MD2 has an integrated chipset which merges the YM2612 with the VDP, so chances are high that they reworked the chip design. I never had a MD2, so unfortun...
by 6502freak
Mon Aug 30, 2010 6:47 am
Forum: SNESdev
Topic: MD vs. SNES: FM vs. PCM
Replies: 77
Views: 23878

The discrete YM2612 chip used in MD1 has a 9bit DAC. The one used inside MD2 ASIC seems to have more than 10bits, but not above 12bits. The quantization noise is much lower on MD2 than it is on MD1. I am somehow not convinced that the noise is generated by the 9 Bit DAC. I have the feeling that the...
by 6502freak
Mon Aug 30, 2010 3:00 am
Forum: SNESdev
Topic: MD vs. SNES: FM vs. PCM
Replies: 77
Views: 23878

Games like Blaster Master and Faxanadu look better on an NTSC TV than on a PlayChoice; this helped popularize NTSC TV emulation in emulators such as Nestopia. Tunes exploiting nontrivial quirks of the BRR decoder for noise generation did the same for SNES DSP emulation. So if we want to popularize ...
by 6502freak
Sun Aug 29, 2010 2:58 pm
Forum: SNESdev
Topic: MD vs. SNES: FM vs. PCM
Replies: 77
Views: 23878

I'm wondering if I can find a comparison between a real YM2612 and emulation. Something that would make the difference obvious like using really high frequencies. Youtube is okay if that is all you can find. The biggest difference between an original YM2612 and a very good emulator, like KEGA, is t...
by 6502freak
Wed Jun 16, 2010 8:30 am
Forum: NESdev
Topic: Improved 400+ color palette demo
Replies: 28
Views: 22932

I'd have thought that the Atari's frame length was a multiple of CPU clocks, so that you could have pixels appear at the same position each frame. I don't remember them shaking, but it was about 6 years ago that I last had a 2600. Each line on the Atari VCS is 228 cycles long at 3.58 Mhz video cloc...
by 6502freak
Sun Jun 13, 2010 11:19 am
Forum: SNESdev
Topic: HVCMODE Pin???
Replies: 59
Views: 17354

If you consider "well explored" as in using hacked on hardware special effects just to make use of hacked on hardware special effects, then I agree it was well explored. But if you consider "well explored" as in programming original special effects through creative use of hacked on hardware special...