SpritesMind.Net

Another thing that bugs me..... The way the CD player is made on the demo seems difficult to handle on a real game. Let me explain : every command uses wait_do_cmd and wait_cmd_ack. These 2 are loops to check the communication flag. On a real game, a loop is a disaster. If your CD is dirty, every ac...

I was waiting for your proto ;) I'm still on it but on the soft side : still working on a ROM tester. My Mode1 ROM was working (until i break it yesterday), next step was to validate it on real hardware. If it works as expected, I'll add the way to send specific command one at a time to check CDD co...

it seems the way you compute track number is wrong.
i had to ryemove your '& and >> to get the right numbers...under fusion

Great find !!!

So 2x (GTL2000 and 22 pullup resistors of 350ohm and 1 of 200Kohm for ref) + 5/3.3V regulator

I'll mean a lot of them : data bus + adress bus + control bus .... And a regulator to get a 3.3V line....

it's there any level translator network ?
I only found 8 bit max...i'll need 4 or 5 of them

I wonder if it won't be easier to be full 3.3V, which mean protect EVERY pin with level translator....

. That 1/60th second delay is critical to some pads. Now going longer is fine - for example, if your code loops once every other vblank, you know you have about 1/30th sec, which is way more than needed. Then it's not so critical. Which get back to my initial question ;) Some pads (third party?) au...

I'm not on the size limit yet so I'll keep your idea for later use

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 ...

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

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

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 ...

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...

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 ...

yes, DEST only act on the tone value, nothing else.