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Author Topic: let's dream about the mini-minimig for a bit...  (Read 4332 times)

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Offline RedskullDC

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Re: let's dream about the mini-minimig for a bit...
« on: September 30, 2008, 10:28:45 AM »
Hi CD32Freak,
Quote

CD32Freak wrote:
Here is what the mini Minimig looks like:
http://www.illuwatar.se/project_pages/mini-minimig/mini-minimig.htm
:-D  ;-)


Looks pretty cool  :-)

A bigger FPGA might be an advantage for expansion later on (XC31000 for example).

Cheers,
Red
Redskull @ Digital Corruption
A500, 4000/060-75MHz
WinUAE on Windows7-X64Ult
Minimig DE1
-------------------------
 

Offline RedskullDC

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Re: let's dream about the mini-minimig for a bit...
« Reply #1 on: October 01, 2008, 08:53:41 AM »
Hi Illuwatar, FrenchShark et al.
Quote

Illuwatar wrote:
If You find a way for homebrewers to mount a BGA to the PCB in a cheap and simple way that could be performed at home, I will be more than happy to design the board...

As it is now, the largest Xilinx FGPA in a hand-solderable package is 500k gates. Any larger uses BGA.


Good point, most people won't be confident usen a toaster/re-flow oven at home  :-(

If you don't mind having a 2-tier board, something like this:
http://www.enterpoint.co.uk/moelbryn/darnaw1.html
could be used.
They sell the PGA Sockets to match.
PGA socket could be mounted on the underside of a mini-mig specific adapter board which could plug onto the top of the darnaw board.

Avnet also do a *VERY* small virtex4 mini-module, which could be similarly employed.

Quote

Thank You for the tip. I could look into that Altera chip. For me, it doesn't matter what is written on the FPGA as long as the code could be ported. Regarding IDE - isn't that what the PIC should do (emulate harddisk-files from UAE)? And for AGA, 24-bit VGA should be enough? Finally, who are willing to take the task of implementing AGA into the FPGA? And if we are into it - going for AGA (A1200) would require a swap of CPU, from the 68000 to a full 32-bit one... (and there we lost the "Mini" in this thing).

The idea of using a development board is fine for developing and testing, but for a final solution, it is not the best option.


24bits is correct for AGA, 8bits/per colour = 16.7M colour palette.

Prefer the Altera tools myself also.
Xilinx still don't have X64 support for their EDK software, plus I get sick of downloading 1Gb+ service packs every couple of weeks for their ISE :getmad:

Having said that, I am currently tinkering with porting the minimigtg68 to the Digilent Nexys2-1200 board.
Have modded the board for 12bit colour, few pics can be seen at:
http://gamesource.groups.yahoo.com/group/minimigtg68/

Really like what you are doing with the PCB's anyway   ;-)

Cheers,
Red



Redskull @ Digital Corruption
A500, 4000/060-75MHz
WinUAE on Windows7-X64Ult
Minimig DE1
-------------------------