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Author Topic: First Start Minimig with FPGA-CPU!!!  (Read 8671 times)

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Offline alexh

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Re: First Start Minimig with FPGA-CPU!!!
« on: September 29, 2007, 02:19:25 PM »
Quote

motorollin wrote:
Oh I see. Does that mean we can just order an FPGA dev board off the web, download the MiniMig "code" or whatever the FPGA equivalent is, and have a MiniMig?

No. You will need to write a board specific wrapper to MiniMig. That could be many weeks work.
 

Offline alexh

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Re: First Start Minimig with FPGA-CPU!!!
« Reply #1 on: September 30, 2007, 12:21:32 AM »
@downix

The EP2C35 FPGA on the DE2 has 32,000 LE's (CLB) and 4Mbyte RAM!!

The XC3S400 used on the original minimig board has 896 LE's and 288Kbyte RAM!

Which one do you think is better?

Read before posting ;-)

@Tobiflex
How did you manage to interface to SDRAM?? I guess you had to implement a FIFO with some sort of prefetch logic? Or clock it many times faster than the design. I think the reason Dennis used SRAM was to overcome the problems with the bursty nature of SDR SDRAM.
 

Offline alexh

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Re: First Start Minimig with FPGA-CPU!!!
« Reply #2 on: September 30, 2007, 09:06:39 AM »
Video output isnt suitable for Amiga
 

Offline alexh

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Re: First Start Minimig with FPGA-CPU!!!
« Reply #3 on: September 30, 2007, 11:56:43 AM »
It's only 4-bit aka 16 colours, you'd need 12-bit (4096) colours for OCS/ECS and 24-bit for AGA