DC SD Card Adaptor

I dumped games in raw mode on a sd-card in about 35minutes, for a 3tracks game (data only) that mean, wihout taking in consideration the 2 first tracks (real speed will be greater than the calculated one):
[(549150-45000)sectors * 2352bytes/sectors]/(35minutes*60seconds/minutes) = 551kB/s

It's still slower than the card's maximum rate, but it's really good FOR A DREAMCAST!
Reading speed should be a bit better too, if the serial port doesn't limits it.

That's pretty great actually, almost 3.7x in cd-rom speed.

You should all get one, it's cool

FG

 

So how did you end going about this?

Did you buy a finished one in a housing?

Did you big one yourself?

If so, did you built it in?

Did you have to remove the capacitors mentioned earlier?

Pics?

Thanks

 

I was under the impression bit banging was a lot slower than that. Not bad. Think I will go through with my plans to fabricate some PCBs.

 

"Bit banging" is really slow but remember the CPU is 200 MHz with a relatively deep pipeline. Pseudocode:

byte = *buffer;
buffer++;

out((byte & bitmask) | clkbit);
clkbit ^= clkmask;
out((byte & bitmask) | clkbit);
byte >>= 1;

out((byte & bitmask) | clkbit);
clkbit ^= clkmask;
out((byte & bitmask) | clkbit);
byte >>= 1;

etc etc

 

I didn't bough a finished housing.
I built it myself (one of the first one beside JJ1ODM).
I soldered directly to the motherboard, but let the cable hang out of the DC.
Yes I had to remove the caps
Well mine is pretty ugly so far, it's fully working but completely ugly. I'll take pics of one I might build for a friend soon, this one will looks more professionnal as I'll do it for someone else, in opposition of the first one I did "to check out if it worked".

@APE: Some PCBs would be cool, but keep in mind that 2$ USB SD-CARD readers can be used as a replacement of a PCB.

Cheers,

FG

 

Kewl

I thinking of building two.

Buying me a cheap DC in which I can built it in directly, as a replace men tfor the serial port.

And one, where I just soler a standard reader to a Serial cable, to test if it'll work with my Biohazard DC, without having to open it, which I obviously am not going to do