[Coco] DE-1 Clarification Please

[James Ross]

Hey Tim,

Thanks for this clarification.  Nice to know!! 

Since the day I got my DE1 to boot up to the 3 amigos, I have not had time to play w/ it again. However, I really want to get the process down pat, since I want to go back-and-forth re-programming it with tutorials and the CoCo3FPGA.  

Here is my question: does the order in which you program DE1 matter?  For example, the last few messages on the Yahoo group a couple of us in that thread have determined that you must:

1) First program the FLASH w/ the ROMS
2) Next program the CoCo3 FPGA *.pof file 

Since if you reverse that order, programming the FLASH second, it will clobber the *.pof file?  

Since apparently to program the FLASH, regardless which control panel you use, the process must load a *.pof file -- w/ the older control panel you have to do it manually, w/ the newer control panel it does it automatically.  

*OR* am I/we incorrect in that assessment?

James
________________________________________
From: Coco <coco-bounces at maltedmedia.com> on behalf of tim franklinlabs.com <tim at franklinlabs.com>
Sent: Tuesday, October 24, 2017 9:58 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] DE-1 Clarification Please

   The PROG/RUN switch enabled the write capabilities of the on board FPGA
   flash device. NOT the FLASH RAM. The FPGA doesn't retain anything when
   power is removed. You can send the progtam directly to the FPGA (.sof)
   file and run it using the programming tool. When power is removed, the
   FPGA forgets the program. There's a "Config Flash" chip connected to
   the FPGA that programs the FPGA automatically at power up. This flash
   is programed by placing the RUN/PROG switch in PROG mode and sending
   the POF file the same way you send the SOF file This is done with the
   programmer tool (not the control panel).

   The control panel allows you to write to the on board external flash. A
   totally seperate chip. This chip is NOT connected to the RUN/PROG
   switch therefore the switch has no affect on writing to it.

     On October 24, 2017 at 4:22 PM rcrislip wrote:
     Trying to follow the various procedures to flash/program the DE-1 is
     a
     little confusing for me. An answer to this question will clear the
     fog
     tremendously. When using the Control Panel, is the "prog/run" switch
     set to prog or run, likewise when using Quartus, what position is
     the
     switch to be in? I think I know, but conformation from you folks
     will help a lot. TIA
     RECrislip
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References

   1. mailto:Coco at maltedmedia.com
   2. https://pairlist5.pair.net/mailman/listinfo/coco

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