Search found 92 matches
- Fri Dec 14, 2012 1:26 am
- Forum: Cartridge
- Topic: custom co-processor chips like the SVP?
- Replies: 94
- Views: 110106
- Tue Dec 04, 2012 10:04 am
- Forum: Sound
- Topic: SN76489 Hardware Question - Can't get this to work
- Replies: 6
- Views: 6521
Looks like you need to press the button on the right at 3.57mhz. You're probably not pressing it fast enough lol edit: Aww it's upside down well that's a lot less funny now :( I guess I can try to be helpful absolute maximum rating for output current @5.5V is 2mA on pin 4 for the SN76489, is 2mA eno...
- Fri Nov 30, 2012 3:52 am
- Forum: Sound
- Topic: Convert Yamaha DX7 Patches to YM2612 format?
- Replies: 18
- Views: 13883
What do you do with the 2 extra operators? Ignore them? An Operator can be used or not. It's entirely up to the Musician what he does with each Operator. However, having more Operators gives the Musician the Potential to create more sonically rich Sounds. With FM one must be very very careful as it...
- Thu Nov 29, 2012 3:04 am
- Forum: Sound
- Topic: YM2612 output buffer
- Replies: 11
- Views: 10333
From http://code.google.com/p/bizhawk/source/browse/trunk/BizHawk.Emulation/Sound/YM2612.Timers.cs?r=2235 The master clock on the genesis is 53,693,175 MCLK / sec (NTSC) 53,203,424 MCLK / sec (PAL) 7,670,454 68K cycles / sec (7 MCLK divisor) 3,579,545 Z80 cycles / sec (15 MCLK divisor) YM2612 is fed...
- Thu Nov 29, 2012 2:39 am
- Forum: Sound
- Topic: Convert Yamaha DX7 Patches to YM2612 format?
- Replies: 18
- Views: 13883
- Wed Nov 28, 2012 1:19 am
- Forum: Sound
- Topic: Convert Yamaha DX7 Patches to YM2612 format?
- Replies: 18
- Views: 13883
- Tue Nov 27, 2012 3:17 am
- Forum: Sound
- Topic: YM2612 output buffer
- Replies: 11
- Views: 10333
The YM2612 has an integrated DAC so it's hard to tell exactly what's going on in-between the signal generator and the DAC. The YM2612 does operate at a fraction of its input clock (it's scaled down internally somewhere from 7.67... mhz). The input clock of the DAC is the internal clock of the ym2612...
- Mon Nov 26, 2012 4:12 am
- Forum: Sound
- Topic: YM2612 write/read/register select
- Replies: 33
- Views: 24294
Try http://depositfiles.com/files/3s7w4dyks for now. I'm in #spoon on irc.quakenet.org if you want to ask anything, but I might be afk. I'm doing midi semi-wrong (a big case statement instead of callbacks) edit: oh, also, this uses two YM2612s, hence the 12 channels. It keeps the data bus for the ym...
- Mon Nov 26, 2012 3:34 am
- Forum: Sound
- Topic: YM2612 write/read/register select
- Replies: 33
- Views: 24294
my code is whoa nasty now, it's a full-on VGM player and MIDI synthesizer that alters registers based on midi control codes so it might not be too useful to you anymore. I also had a power supply failure that took down my file server so those links will be dead until I get it back in order. I think ...
- Fri Nov 16, 2012 8:50 am
- Forum: Blabla
- Topic: Spartan-3 Board
- Replies: 8
- Views: 6052
- Fri Nov 16, 2012 1:33 am
- Forum: SGDK
- Topic: Is there a SGDK suite? What would it look like?
- Replies: 35
- Views: 21294
I didn't mean to derail the thread, I'm just bikeshedding. But I do think Windows is a dying platform and I wouldn't tie a tutorial tool to it. Your target audience is either already experimenting with Linux or will be soon. Having to deal with make for windows and environment variables and mingw is...
- Thu Nov 15, 2012 8:36 pm
- Forum: SGDK
- Topic: Is there a SGDK suite? What would it look like?
- Replies: 35
- Views: 21294
Setting up a development environment in Windows is like pulling teeth. Some IDEs might do it acceptably (Code::Blocks does a good enough job) but if you need to teach someone how to use a dev kit do you want them learning a new IDE at the same time? It's easier to just stop thinking about the Window...
- Thu Nov 15, 2012 9:51 am
- Forum: SGDK
- Topic: Is there a SGDK suite? What would it look like?
- Replies: 35
- Views: 21294
- Sun Nov 04, 2012 12:35 am
- Forum: Sound
- Topic: YM2612 write/read/register select
- Replies: 33
- Views: 24294
- Wed Oct 31, 2012 8:11 pm
- Forum: Sound
- Topic: z80 vgm player
- Replies: 34
- Views: 44075
The main cpu hog in VGM seems to be the wait instructions and PCM commands. If you can combine 3 or more consecutive 1-nibble wait instructions (0x7n commands in the VGM file) into one 2-byte wait instruction (0x61) you might be able to get much better performance. You can also usually combine conse...