Search found 745 matches
- Sun Jul 16, 2017 12:26 pm
- Forum: Megadrive/Genesis
- Topic: Super Magic Drive research thread
- Replies: 133
- Views: 275433
Re: Super Magic Drive research thread
This is normal practice. This table can be used by downloadable software. And these vectors will always be true, even if the system software is updated.
Re: FPGA 5V
Exactly.
- Mon Jul 03, 2017 5:16 am
- Forum: Hardware
- Topic: HDD (or flash) instead of a CD, questions...
- Replies: 140
- Views: 173115
Re: HDD (or flash) instead of a CD, questions...
so bad the 16channels costs 3x the 8channels version It is because 8x is only simple Cypress controller and it support only 24MS/s. 16x contain FPGA and can up to 100MS/s with 1 channel. So it is still cheaper than other LAs. I bought for $37 (more than year ago) . The cheapest LA in 16ch streaming...
- Mon Jul 03, 2017 5:04 am
- Forum: Hardware
- Topic: DIY controller not possible with AVR ?
- Replies: 7
- Views: 11750
Re: DIY controller not possible with AVR ?
Agree with Chilly Willy.
- Fri Jun 30, 2017 10:11 am
- Forum: Hardware
- Topic: HDD (or flash) instead of a CD, questions...
- Replies: 140
- Views: 173115
Re: HDD (or flash) instead of a CD, questions...
What do you want to get?
- Fri Jun 30, 2017 3:07 am
- Forum: Hardware
- Topic: HDD (or flash) instead of a CD, questions...
- Replies: 140
- Views: 173115
Re: HDD (or flash) instead of a CD, questions...
SCOR tells the host a new frame began and that the following frame will be the the first bit of P-W Yes. That is exactly what I trying to say, but from the viewpoint of probable realization in the hardware. In those days no one was to want to complicate any of IC part, because of many reasons, some...
- Thu Jun 29, 2017 3:03 pm
- Forum: Hardware
- Topic: HDD (or flash) instead of a CD, questions...
- Replies: 140
- Views: 173115
Re: HDD (or flash) instead of a CD, questions...
To be honest, i know the answer was on this picture...but I was unable to read it correctly :( but still, if it read 2 frames (to get S0 & S1), it should mean SCOR should be set for 2 frames no ? I understand you. But the only way to find sync is get to subcode bytes with some unique states. So to ...
- Thu Jun 29, 2017 2:51 pm
- Forum: Hardware
- Topic: HDD (or flash) instead of a CD, questions...
- Replies: 140
- Views: 173115
Re: HDD (or flash) instead of a CD, questions...
Yes, but nIRQ is not 1/75. It is most like 1/150.KanedaFr wrote:which prove MCD is 1x CD driveHardWareMan wrote:SCOR period: 1/75 sec.
and you do understand why I wanted to check fi SCOR was in sync with IRQ which 1/75sec too
- Thu Jun 29, 2017 2:47 pm
- Forum: Hardware
- Topic: HDD (or flash) instead of a CD, questions...
- Replies: 140
- Views: 173115
Re: HDD (or flash) instead of a CD, questions...
THANKS !!! awesome !!! You're welcome. so, for me, the only question still here (for now) is why SCOR is only 1 frame and not 2 like it should be : A sector is 98 frames, with 2 frames for S0/S1 synchronisation word and 96 frames for subcode = 96bit for P, 96bit for Q,...... so where is the second ...
- Thu Jun 29, 2017 2:32 pm
- Forum: Hardware
- Topic: HDD (or flash) instead of a CD, questions...
- Replies: 140
- Views: 173115
Re: HDD (or flash) instead of a CD, questions...
Like I said, I'd like to confirm if there is any link between comm, sub and data....or they're totally independant so could you measure IRQ / WFCK / LRCK on the same timing ? Here we come. Power up and boot Earthworm Jim CD: http://savepic.ru/14649417m.png Some closeups with nIRQ is active: http://...
- Thu Jun 29, 2017 2:08 pm
- Forum: Hardware
- Topic: HDD (or flash) instead of a CD, questions...
- Replies: 140
- Views: 173115
Re: HDD (or flash) instead of a CD, questions...
OK. I think we can do first approach to make FLASH player of CD image. The only thing is still undiscovered is set of commands and statuses on control 4 bit bus.
- Thu Jun 29, 2017 12:19 pm
- Forum: Hardware
- Topic: HDD (or flash) instead of a CD, questions...
- Replies: 140
- Views: 173115
Re: HDD (or flash) instead of a CD, questions...
I've got it. The CD track is kind of tape with 74/80/99 minutes of play, digitally. So, when it carries an audio data, there no need a perfect sync, so rough time coordinate is M:S:F format in subchannel. When they turn the audio CD to the data CD, there must be more accurate sync to the "tape". So,...
- Thu Jun 29, 2017 12:05 pm
- Forum: Hardware
- Topic: HDD (or flash) instead of a CD, questions...
- Replies: 140
- Views: 173115
Re: HDD (or flash) instead of a CD, questions...
Anyway, what about capture data?
- Thu Jun 29, 2017 11:41 am
- Forum: Hardware
- Topic: HDD (or flash) instead of a CD, questions...
- Replies: 140
- Views: 173115
Re: HDD (or flash) instead of a CD, questions...
I forgot control channel. Here is power up: http://savepic.ru/14634000m.png Little bit closer at reset: http://savepic.ru/14614544.png http://savepic.ru/14634003m.png http://savepic.ru/14662674m.png Shortest nIRQ period is 6.334 ms. http://savepic.ru/14674965m.png The rest periods seems to be multip...
- Thu Jun 29, 2017 10:34 am
- Forum: Hardware
- Topic: HDD (or flash) instead of a CD, questions...
- Replies: 140
- Views: 173115
Re: HDD (or flash) instead of a CD, questions...
Same here (no audio disk -> audio disk load -> audio disc play): http://savepic.ru/14651418m.png A little bit closer while playing: http://savepic.ru/14623744m.png SCOR period: 1/75 sec. SCOR pulse is right one WFCK clock period. EXCK/SBSO active only when WFCK is low and they push only 8 bits at on...