Last edited by Anthony817; 08-09-2011 at 10:03 PM.
Easy man, take it easy, it's just a prototype. Even Deunan said that if you only want a free gd game emulator this will be only keep for his makaron tests.
It's a great thing but is very early.
Yeah he just said that now, not when I posted this 2 hours ago. I know I should have never told anybody and let him do what he wanted with it.
I was just posting Dreamcast news like I always do. Even with the SD adapters nobody ever mentioned pirating, we always said you have to rip your own GDR's
I agree though, shouldn't have jumped the gun, but I was only posting this where it was relevant to others.
Last edited by Anthony817; 08-09-2011 at 10:22 PM.
does it plug in to the modem port? or is that just for the development of the thing?
From his site he says this.
So for now I think he soldered it to the board but plans on using a connector so it just plugs into the system later on.What you see on the photo is Dreamcast with it's cover off and the GD drive assembly removed. I cut some holes and soldered wires directly to the mainboard to avoid messing with the original connector. This way I can always plug the drive back in and use it as before - or even better, I can use FPGA as logic analyzer to watch the traffic.
Its an altera FPGA. I'm not familiar with that specific model myself but that is how he did it. Time, energy, and likely a lot of VHDL.
EDIT: If I'm understanding his wording right (seems a bit odd) its a Cyclone II.
Last edited by APE; 08-10-2011 at 08:15 PM.
From what I understand he wants to shrink it down when he perfects it and use one of these things.
He just needs something sufficient enough to keep up with the Dreamcast clock speeds.
I'm sure there are FPGAs out there fast enough, the problem is that they tend to be a bit expensive.
Are you joking? Arduinos are basically the same as PIC chips, they's slow and have a maximum of 18 pins, how're you going to interface with a propietry CDROM interface and an SD Card and RAM with 18 pins and something that can just about flash a few LEDs on and off.
CDROMs transfer data at ~3MBPS, arduino can just about manage serial at 115Kbps from what I remember.
hahaha. Arduino's can not do what an FPGA can do man...
The Arduino, has a very slow microcontroller with a limited amount of digital and analog inputs / outputs.
It is just out of the question to use one for this project.
Above all that, what he has done is excellent. Again, this is what I am now trying to acheive for my PS1 SD Card System.
The board he is using, is an Altera DE1. You can see, he is using an external clock and not one of the 3 on-board oscillators.
Yes. It is a Cyclone II. It is actually a EP2C20F484C7 FBGA with 484 pins. It features,
1.2 volts core voltage,
239616 Memory Bits,
52 Embedded Multipliers,
and 16 Global Clocks.
PM me when its finished and I can order one, then give me directions to the online poll for the Saturn version :)
Strange I was just wondering what happened to the DC IDE project.
There was a complete Modembus-to-ISA-to-IDE adapter built with nothing but common TTL parts and
Using a FPGA is only needed to emulate the GD drive logic/software, correct ?
I think a practical GD-ROM replacement needs to patch the bios / interrupt routines and then have some simple CPLDs as glue logic to a CF-IDE drive. (Or IDE to SATA converter)
A MCU plus some cheap CPLDs and EEPROM with a fancy software can do all that ~
(the software becomes the complex component then... real-time interrupt patching and the horror )