Search found 1136 matches

by KanedaFr
Wed Jul 05, 2017 9:15 pm
Forum: Sound
Topic: Sega CD Mode 1 support functions for SGDK
Replies: 25
Views: 71047

Re: Sega CD Mode 1 support functions for SGDK

This is another problem. The Mega CD docs feel like a trainwreck compared to the Mega Drive docs, information is either spread all over the place (often in irrelevant locations) or outright missing making it a freaking pain in the ass to figure out how anything works at all. I still can't remember ...
by KanedaFr
Wed Jul 05, 2017 9:08 pm
Forum: Mega/SegaCD
Topic: Sub Header
Replies: 6
Views: 10551

Re: Sub Header

After some times thinking on it, it's clearly a bra that we need.
If you exit, it means you can only handle ONE command per VInt => when the main( ) starts

so let's keep the loop ;)


And I really like your idea...it would be very useful for a Mega(CD)Games compilation ;)
by KanedaFr
Wed Jul 05, 2017 4:59 pm
Forum: Sound
Topic: Sega CD Mode 1 support functions for SGDK
Replies: 25
Views: 71047

Re: Sega CD Mode 1 support functions for SGDK

If I remember, you already answered to Sik on Sega16 back then, when you released your Mode1 demo ;)

(I read a lot on this topic lately, it's how I know!)


And, to the topic, it's exactly what's I'm doing this week ;)
RAW port was done, I'm trying to make it clear and easier to use before release
by KanedaFr
Wed Jul 05, 2017 4:58 pm
Forum: Mega/SegaCD
Topic: Sub Header
Replies: 6
Views: 10551

Re: Sub Header

Shame on me...everything I was looking for is on the MEGA-CD BIOS Manual, starting at page 30 :oops: I thought it was only the bios calls :( For main(), what's the better use then ? to loop on it (bra _main) or to exit and wait for next int2 ? From the manual, I would say exit and wait, but none of ...
by KanedaFr
Wed Jul 05, 2017 11:40 am
Forum: Mega/SegaCD
Topic: Sub Header
Replies: 6
Views: 10551

Sub Header

Where could I find info on the SubProgram header ? I saw nothing on the official doc on how to write a sub program, starting with the header.... For ex, what's the difference between SPInit and SPMain ? Does SPMain mean to be called after a Reset (using register $A12000) ? Is there 3 , 4 or more jum...
by KanedaFr
Wed Jul 05, 2017 10:39 am
Forum: Sound
Topic: Convert atari st ym sound
Replies: 9
Views: 12944

Re: Convert atari st ym sound

I think, now rereading my code and based on your comment, the *PAL and *NTSC thing is prone to confusion. This define the clock rate (and not the rate) of the CPU used to render the sound It's to convert a sound coming from any CPU to the z80 : 3.579545 MHz (NTSC), 3.546894 MHz (PAL) So the 50/60hz ...
by KanedaFr
Tue Jul 04, 2017 4:57 pm
Forum: Sound
Topic: Convert atari st ym sound
Replies: 9
Views: 12944

Re: Convert atari st ym sound

yes, DEST only act on the tone value, nothing else.
by KanedaFr
Tue Jul 04, 2017 8:32 am
Forum: Mega/SegaCD
Topic: SEGA CD Mode 1
Replies: 57
Views: 286911

Re: SEGA CD Mode 1

OK, I got it : RTE vs RTS ;)
by KanedaFr
Mon Jul 03, 2017 10:14 pm
Forum: Mega/SegaCD
Topic: SEGA CD Mode 1
Replies: 57
Views: 286911

Re: SEGA CD Mode 1

Since this thread get some new coverage, I tried myself to make SGDK compatible mode 1. I go up to the sub run, then, I activate the vint synchronize thing and everything crash.... Probably something on my code but I don't know how to debug this !!! It seems Fusion and RetroArch support this boot fr...
by KanedaFr
Mon Jul 03, 2017 9:59 pm
Forum: Hardware
Topic: DIY controller not possible with AVR ?
Replies: 7
Views: 10849

Re: DIY controller not possible with AVR ?

oh...so trying to handle everything with the µC isn't always a good idea ;)

But using a multiplexer, I don't see how you could force your own peripheral ID, like I asked on the another thread...
by KanedaFr
Sun Jul 02, 2017 10:20 pm
Forum: Hardware
Topic: DIY controller not possible with AVR ?
Replies: 7
Views: 10849

DIY controller not possible with AVR ?

Hi, i was about to make a secret-product-to-Genny joypad when I read this interesting post of raphnet So it seems you can't make "easily" a home made joypad with an avr (read arduino too)... what do you thing of his experiment ? Does it mean you need a better µC ? or just avoid AVR ? What's bug me i...
by KanedaFr
Sun Jul 02, 2017 10:16 pm
Forum: Hardware
Topic: HDD (or flash) instead of a CD, questions...
Replies: 140
Views: 165593

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

HardWareMan wrote:What do you want to get?
OT:
nothing, only wanted to know if the I2S was as great as it seems (with sound save) ;)
I discovered the saleae products this week and they seems really good...
so bad the 16channels costs 3x the 8channels version
by KanedaFr
Fri Jun 30, 2017 9:13 am
Forum: Hardware
Topic: HDD (or flash) instead of a CD, questions...
Replies: 140
Views: 165593

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

KanedaFr wrote: What did you use to render them ?
it seems really useful to mesure time and freq as well...
Ok, I found you use the saleae software.
Did you try the i2s plugin ?
by KanedaFr
Fri Jun 30, 2017 9:11 am
Forum: Hardware
Topic: HDD (or flash) instead of a CD, questions...
Replies: 140
Views: 165593

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

Now, we can use arduino for CDC controlling, CPLD for subcode decoding to track time and syncing and some I2S DAC, such TDA1543 to build true CD player, based on MCD drive. It will be interesting, heh? CPLD also can be used for multiplexing to bytes and demultiplexing to nibbles. Somebody can say t...
by KanedaFr
Thu Jun 29, 2017 10:19 pm
Forum: Hardware
Topic: HDD (or flash) instead of a CD, questions...
Replies: 140
Views: 165593

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

... But it seems to be SCOR uses AND too. ** FACEPALM ** Of course, the answer was here from the beginning : SCOR is set when the synchronisation WORD is met. This word is unique and nowhere else to be found. But S0 BYTE could be found alone, as well as S1 BYTE but these 2 will never be met togethe...