[Coco] Altera DE1 for sale

Sat Oct 21 14:56:14 EDT 2017

Yeah, I think there are a lot of variations to the ‘official’ specs and of course there are many different modes other than the de facto standard 640x480.  I’m pretty sure most LCD monitors allow a bit of slop in the timing.

Dave

> On Oct 21, 2017, at 10:09 AM, tim franklinlabs.com <tim at franklinlabs.com> wrote:
> 
>   One thing I always found odd about the Altera boards (DE1/DE2) was the
>   video sync code supplied with the CD as "Examples". I noted that the
>   code has the VGA sync timing parameters correct but the code adds in
>   "fudge factors" (i.e. delay parameters). The DE2 has additional clocks
>   added to the code beyond the delays. I always attributed this to the
>   clock difference between the 27.125Mhz being limited to 27.2Mhz from
>   the PLL on the Altera board.
>   To investigate this, I rewrote my own video sync generator that uses
>   only the true video timing with no added delays and "fudge nuggets" of
>   code. It works perfect and doesn't have any problems with any monitor
>   I've tried. I discovered what they were doing wrong and am convinced
>   the code was written by interns (LOL)
> 
>     On October 21, 2017 at 9:57 AM Rob Rosenbrock wrote:
>     It's been awhile since I installed the software (this is my second
>     board) but I remember the disc being pretty useless. I had to
>     download the newer version anyway. I'll be doing it again...
>     BTW, I'd bet these came from ITT Technical Institute as part of the
>     closure. My board is labeled as EECS which sounds like one of their
>     class labels. Mine is board #60, so that might help in determining
>     how many are available.
>     Thanks for the link.
> 
>     On Oct 21, 2017, at 10:29 AM, tim franklinlabs.com wrote:
>     If needed, the entire CD for the DE1 is available here..
>     [1][1]http://hamblen.ece.gatech.edu/DE1/
>     On October 21, 2017 at 9:23 AM Rob Rosenbrock wrote:
>     FWIW:
>     I'm taking a closer look at it today. My board is actually in
>     excellent shape; apart from the broken plexiglass, it looks almost
>     new.
>     I connected it to a monitor and the (included) power supply. When I
>     pressed SW11, (with SW12 in the RUN position,) the monitor came
>     alive with the Altera demo screen and the LEDs began their chase
>     sequence. The 7-segment displays began counting from 0-F. Pressing
>     Key0 reset the demo, and SW0 displayed a color test screen. When I
>     connected a speaker to the headphone jack, I got a normal tone. SW11
>     stops and starts the demo.
>     In my box, I received the DE1, a CDROM, USB cable, and the power
>     supply. I did not receive any documentation (other than the CD), nor
>     a jumper wire. Frankly, we only need the board and the power supply
>     - the rest is easily obtained or is irrelevant; the software is
>     downloaded. Despite my OCD I'm pleased.
>     Looking at the board, SRAM 512KB is a IS61LV25616AL-10 which (as far
>     as I can tell) is the older version. The newer boards used the
>     IS61WV25616EDBLL-10. I don't anticipate any issues.
>     It's not much of a gamble. Stakes aren't very high.
>     On Oct 21, 2017, at 5:58 AM, Mark McDougall wrote:
>     On 21/10/2017 11:55 AM, James Ross wrote:
>     Similar experience here, too...
>     Thanks Jim, Rob, Dave & James for your feedback.
>     I think I'll take a gamble; looks like it's luck of the draw. I
>     suspect the seller might mix it up a bit if I purchase 4 though...
>     we'll see. I'm yet to get confirmation of my counter offer, though I
>     didn't offer any less than someone else has reported - and I'm
>     taking 4...
>     Regards,
>     --
>     Mark McDougall
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>     References
>     1. [6]http://hamblen.ece.gatech.edu/DE1/ 2.
>     mailto:[7]Coco at maltedmedia.com 3.
>     [8]https://pairlist5.pair.net/mailman/listinfo/coco 4.
>     mailto:[9]Coco at maltedmedia.com 5.
>     [10]https://pairlist5.pair.net/mailman/listinfo/coco
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> References
> 
>   1. http://hamblen.ece.gatech.edu/DE1/
>   2. mailto:Coco at maltedmedia.com
>   3. https://pairlist5.pair.net/mailman/listinfo/coco
>   4. mailto:Coco at maltedmedia.com
>   5. https://pairlist5.pair.net/mailman/listinfo/coco
>   6. http://hamblen.ece.gatech.edu/DE1/
>   7. mailto:Coco at maltedmedia.com
>   8. https://pairlist5.pair.net/mailman/listinfo/coco
>   9. mailto:Coco at maltedmedia.com
>  10. https://pairlist5.pair.net/mailman/listinfo/coco
>  11. mailto:Coco at maltedmedia.com
>  12. https://pairlist5.pair.net/mailman/listinfo/coco
>  13. mailto:Coco at maltedmedia.com
>  14. https://pairlist5.pair.net/mailman/listinfo/coco
> 
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