Search found 125 matches

by doragasu
Sun Feb 09, 2014 3:16 pm
Forum: Tools
Topic: BlastEm - Yet another Genesis emulator
Replies: 63
Views: 13614

That's wonderful news!!!

Thanks for the update!
by doragasu
Sat Feb 08, 2014 10:53 pm
Forum: Tools
Topic: BlastEm - Yet another Genesis emulator
Replies: 63
Views: 13614

Any news about a new version with GDB support?
by doragasu
Sat Jan 25, 2014 9:25 pm
Forum: Hardware
Topic: Sega MD/Genesis Turbocard
Replies: 14
Views: 4633

Better sound you could probably do by generating PCM and feeding it into the 2612's PCM line. know what the max throughput is exactly. IIRC the cartridge port has an analog audio input (can't remember if it's mono or stereo though) so it should be possible to generate CD quality audio using hardwar...
by doragasu
Wed Jan 01, 2014 9:29 pm
Forum: Hardware
Topic: Hardware VGM player
Replies: 13
Views: 3889

Does that apply to the YM2612? I cannot find that in the YM2608 manual. Also what do you mean by "index writes"? Register address writes maybe?

How can I know what registers require 47/83 cycles?
by doragasu
Wed Jan 01, 2014 5:08 pm
Forum: Hardware
Topic: Hardware VGM player
Replies: 13
Views: 3889

Found a YM2608 japanese datasheet. I suppose this should be nearer to the YM2612 than the YM3438. Most of the timing details are the same, but there are different diagrams for FM, SSG and ADPCM reads/writes. Also it looks like there are no restrictions on consecutive reads/writes. Too bad it's japan...
by doragasu
Tue Dec 31, 2013 10:22 am
Forum: Hardware
Topic: Hardware VGM player
Replies: 13
Views: 3889

By the way, is there any timing information on the chip? How much time do I have to assert the IC signal to reset the chip? And the same about CE, RD WR and data (D0~D7) signals. EDIT: I'm browsing an YM3438 japanese datasheet. Assuming timing is the same for YM2612, to write data I have to: 1.- Wri...
by doragasu
Tue Dec 31, 2013 10:18 am
Forum: Hardware
Topic: Hardware VGM player
Replies: 13
Views: 3889

I have never touched it while working in the MD, so I don't know. As I was not driving CE, RD and WR signals, I suspect maybe all of them could be active, and I'm wondering if this could cause trouble. I want to write code to initialize the chip and set these signals to disabled state ('1'). Unfortu...
by doragasu
Mon Dec 30, 2013 11:40 am
Forum: Demos
Topic: overdrive
Replies: 42
Views: 12633

Gotta get some time to test this version and see if it works with my console!
by doragasu
Mon Dec 30, 2013 11:39 am
Forum: Hardware
Topic: Hardware VGM player
Replies: 13
Views: 3889

I have started experimenting with the YM2612. So far I have only connected power and GND pins to 5V, and the buses (D0~D7, A0, A1, CS, RD, WR, IC) to GPIO pins in the Stellaris Launchpad. These pins are not configured (so right now they are HighZ). I have neither connected the 7,67 MHz clock to the ...
by doragasu
Mon Nov 04, 2013 7:54 am
Forum: Hardware
Topic: Hardware VGM player
Replies: 13
Views: 3889

Thanks for the replies! "periodic" mode on the noise channel has 6.66...% duty cycle rather than 6.25% which is pretty noticable. White noise is not really different audibly from the shorter register. Is it really that noticeable? Is "periodic" noise often used for game tunes? (I don't care if it is...
by doragasu
Sat Nov 02, 2013 12:52 pm
Forum: Hardware
Topic: Hardware VGM player
Replies: 13
Views: 3889

Hardware VGM player

I was thinking of gluing together an SN76489AN, an YM2612, a microcontroller (something like an MSP430 or a Tiva C if more juice is needed), an SD slot and some batteries to make a (kind of) portable Genesis VGM files player. I have started reading VGM files documentation and also some info about SN...
by doragasu
Sat Oct 26, 2013 7:45 pm
Forum: Demos
Topic: wolfenstein demo for sega genesis
Replies: 360
Views: 111793

Amazing work. Keep it up!
by doragasu
Fri Sep 13, 2013 9:27 am
Forum: Super 32X
Topic: Megadrive to 32x porting
Replies: 1
Views: 2107

Short answer: No.

Long answer: To port games you need the source code, and that is something you seldom have. You could reverse engineer the games or re-write them from scratch, but that's a ton of work, and I don't think it's worth the effort.
by doragasu
Fri Sep 13, 2013 9:23 am
Forum: Tools
Topic: BlastEm - Yet another Genesis emulator
Replies: 63
Views: 13614

Mask of Destiny wrote:Yes! GDB remote debugging is a feature I was hoping to have for the first release, but I wasn't able to finish it on time. Hopefully will be in the next version.
That's great news!!!

Really looking forward for the next version!!!
by doragasu
Thu Sep 12, 2013 9:52 am
Forum: Tools
Topic: BlastEm - Yet another Genesis emulator
Replies: 63
Views: 13614

Great news! I will give it a try.

Are you planning to add debugging support using gdb/gdbserver? It would be really appreciated.