SpritesMind.Net

Nice to see that my project is useful to someone
Keep up the good work.

I will be there, demonstrating the Genesis-in-a-FPGA project

I released the source code and programming files.
See here : http://code.google.com/p/fpgagen/

Here is a new video. Now, games I've tested so far work... but with some display issues.
http://www.youtube.com/watch?v=ilzKiW21T9Y

I fixed some missing stuff (especially the status register of the VDP), and now, some commercial games work (with some display bugs).
So far, I have tried Golden Axe and Hard Drivin'.
I'll make some videos about it, this week-end probably.
Meanwhile, I'll be probably able to fix some display bugs.

My implementation supports Z80 access to the 68000 RAM. Apparently it doesn't work on all Genesis revisions.
For a pin-to-pin replacement of the VDP, well, it's not even close, as I had to cope with the board's constraints (i.e use SRAM instead of DRAM), and also TG68 core constraints (it doesn't ...

For the moment, there is no sound : nothing about the YM2612, and I've only written the timers of the PSG, as it seems that this is the only part that may cause issues with the the Z80 code, if it was missing.

The TG68 core had a small issue with the MOVEM instruction, now fixed (I've contacted the ...

I've been working on this for some months now, and I'm glad to have the first significant results today.
See the (crappy) video here : http://www.youtube.com/watch?v=tOXrv4ubEbY
It is based on :
- the TG68 core from Tobias Gubener.
- the T80 core from Daniel Wellner.
- glue logic and VDP core from ...

The issue is not related to clock generation itself, but to resource sharing.
MCLK/15 and MCLK/7 will overlap. Using MCLK/14 and MCLK/7 clocks makes it easier to synchronize the whole stuff.
I guess I could correct this "overclocking" by inserting waitstates every 14th cycle or so.

Hi,
I'm currently thinking about a possible hardware emulation of the Genesis in a FPGA. I'm only at a stage where I want to gather as much information as possible, and I'm somewhat struggling with some hardware restrictions of the board I'm using.

So here is my question : from you experience, what ...