Search found 711 matches

by HardWareMan
Wed Jun 28, 2017 5:43 am
Forum: Hardware
Topic: HDD (or flash) instead of a CD, questions...
Replies: 140
Views: 32459

Re: HDD (or flash) instead of a CD, questions...

I have MD1 and I can make some records for you.
by HardWareMan
Sat Jun 24, 2017 3:59 am
Forum: Hardware
Topic: HDD (or flash) instead of a CD, questions...
Replies: 140
Views: 32459

Re: HDD (or flash) instead of a CD, questions...

Every frame of 98 contains not only subchannel data but left and rigth channel samples. I don't remember how much but I guess 6 of each. 44100 / 75 / 98 = 6. 6 * 2 * 2 = 24 bytes.
by HardWareMan
Wed Jun 21, 2017 2:41 pm
Forum: Hardware
Topic: HDD (or flash) instead of a CD, questions...
Replies: 140
Views: 32459

Re: HDD (or flash) instead of a CD, questions...

KanedaFr wrote:Sorry but your first post was a mistery, like..."yes 12...and so ?" ;)
Quite round integer after division, isn't it? I just was want to show this fact. The rest you should have guessed yourself. In fact, there tons of frequencies that pretty multiples to each other. With integer multiplier.
by HardWareMan
Wed Jun 21, 2017 11:22 am
Forum: Hardware
Topic: HDD (or flash) instead of a CD, questions...
Replies: 140
Views: 32459

Re: HDD (or flash) instead of a CD, questions...

Again: 384 / 2 / 16 = 12. Because 2 channels with 16bit in each. 12x oversampling for one bit Delta-Sigma DAC.
by HardWareMan
Wed Jun 21, 2017 3:35 am
Forum: Hardware
Topic: HDD (or flash) instead of a CD, questions...
Replies: 140
Views: 32459

Re: Re:

KanedaFr wrote:
TmEE co.(TM) wrote:the 16MHz is 16.934400MHz, which is CDDA bitclock.
I don't understand where this value come from....
16 934 400 / 44 100 / 2 / 16 = 12.
by HardWareMan
Tue May 02, 2017 4:16 am
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8624

Re: MD hangs after playing any PCM file

The bus buffers I'm also using another part because I don't trust those 5<->3.3V bidirectional converters. I'm stepping down the 5V signals to 3.3V, but not the other way around. You totally right. There was another project with FC stuff and bidirectional automatic shifters created a big headache. ...
by HardWareMan
Tue Apr 25, 2017 4:25 am
Forum: Sound
Topic: too many YM2612 infos ?
Replies: 14
Views: 1577

Re: too many YM2612 infos ?

It is a one of possible variant.
by HardWareMan
Wed Apr 19, 2017 3:25 am
Forum: Hardware
Topic: DS 16
Replies: 2
Views: 694

Re: DS 16

Also it has no VD12-VD15. But it provide higher addresses and CE0. Also, it provides MRES and M3. So, basic signals it takes from EXT port, higher addresses and CE0 via this cartrige (that's why 244s need for) and able to MRES (more powerfull than VRES!) and M3. Simple and clever I think.
by HardWareMan
Tue Apr 18, 2017 2:36 pm
Forum: Sound
Topic: too many YM2612 infos ?
Replies: 14
Views: 1577

Re: too many YM2612 infos ?

As I said before, leave discussion and create separate topic for pure checked info only.
by HardWareMan
Thu Apr 13, 2017 5:46 am
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8624

Re: MD hangs after playing any PCM file

Pity that I haven't UMDK, but maybe somehow my records from IC BD M5 VA1 with running the Sonic 1 on FLASH card will help. The legend: Yellow - CE0 Cyan - VA15 Purple - DTACK Blue - CAS2 Here the moment of ending "SEGA": http://savepic.ru/13517484.png http://savepic.ru/13523628.png http://savepic.ru...
by HardWareMan
Wed Apr 12, 2017 3:24 am
Forum: Announcement
Topic: Future of SpritesMind
Replies: 38
Views: 5360

Re: Future of SpritesMind

I actually have some Mega Drive hardware business to talk with you but SpritesMind doesn't let me touch PMs at all =/ (neither read nor write) so huh is there some other way to contact you? Why so? I was able to use PMs right after register. Did you try to set it here? http://savepic.ru/13543419.png
by HardWareMan
Tue Apr 11, 2017 10:15 am
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8624

Re: MD hangs after playing any PCM file

Jorge Nuno wrote:HardWareMan VDP pin 118 :wink:
Oh, you're right. My bad.
by HardWareMan
Tue Apr 11, 2017 1:47 am
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8624

Re: MD hangs after playing any PCM file

Well I see the pin is CAS0 on the VDP, but on cart and expansion slot diagrams around the place it seems to be listed as OE. Maybe I'll randomly switch between the two and everyone will have to guess what I'm on about. Here, I'll put it closer to you. http://savepic.ru/13550680m.gif http://savepic....
by HardWareMan
Sun Apr 09, 2017 6:17 am
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8624

Re: MD hangs after playing any PCM file

Yes, it is bus metastability. Since M68K itself can't do that after AS asserting (@design), so this is chipset related problem. Oh, deja vu, is we already discussed it before? Anyway, yes, there is a problem. Since SRAM or ROM can handle with this by that fact that those metastabilities ends before ...
by HardWareMan
Sun Apr 09, 2017 5:48 am
Forum: Announcement
Topic: Future of SpritesMind
Replies: 38
Views: 5360

Re: Future of SpritesMind

Although I don't know the whole inside SM but I totally agree with you. Same thing happens with me but without having my own forum - I realized long time ago that I can't handle it because sufficient of time. I'm will not make any game or tool because I'm hardware guy. I'm ready to share what I know...