[Coco] DE-1 Clarification Please
tim franklinlabs.com
tim at franklinlabs.com
Sat Oct 28 19:54:22 EDT 2017
Thanks Bill, I haven't kept up with all the changes since the analog
board came out.
On October 28, 2017 at 6:39 PM Bill Pierce via Coco wrote:
BTW, 4.2 Beta is Gary's beta release of the cycle accurate CPU. It
has a few known bugs, mainly that it will not run at the 25hz
speeds.
Bill Pierce
"Charlie stole the handle, and the train it won't stop going, no way
to slow down!" - Ian Anderson - Jethro Tull
My Music from the Tandy/Radio Shack Color Computer 2 & 3
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E-Mail: [3]ooogalapasooo at aol.com
-----Original Message-----
From: James Ross
To: CoCoList for Color Computer Enthusiasts
Sent: Sat, Oct 28, 2017 6:42 pm
Subject: Re: [Coco] DE-1 Clarification Please
No... I didn't try 4.2 beta at all... I am not at home on my PC
right now (out and on my notebook)... let me log into Yahoo and I
will let you know exactly which file I used.
James________________________________________From: Coco on behalf of
tim franklinlabs.com Sent: Saturday, October 28, 2017 10:38 PMTo:
CoCoList for Color Computer EnthusiastsSubject: Re: [Coco] DE-1
Clarification Please James, Are you using version 4.2 beta? On
October 28, 2017 at 5:30 PM James Ross wrote: I did try Kip's guide
as well (I should have mentioned that, too). I thought I followed it
very closely ... but w/ no success. It was only when I reversed the
order that it took. But, it is possible that I had done something
else wrong before that, and it has nothing to do w/ the order...
maybe I did, but I don't believe I did. But I did no further
experimentation -- which I should have done! It should not be the
fact that one must program their device multiple times before it
takes (not saying that you are implying that either). Just saying,
that there has got to be a precise explanation of what folks are
doing wrong and why that does not work when they do that. And
likewise there should be a precise guide that will work every time
w/o fail regardless from a fresh device or one that has been used
over and over. James _______________________________________ From:
Coco on behalf of Bill Pierce via Coco Sent: Saturday, October 28,
2017 9:35 PM To: [1][4]coco at maltedmedia.com Cc: Bill Pierce Subject:
Re: [Coco] DE-1 Clarification Please James, I have programmed the
pof and flash randomly (as far as order) many times and it doesn't
seem to make a difference, BUT... if you search through the messages
on the Coco3FPGA group, you'll find that many people have had to
program the unit several times before it takes. I have had to do
this myself at times. I don't know if it's the programming software
or the FPGA that's at fault, but it does happen. I know someone
(can't remember who) had to program theirs several times before it
finally worked. As I stated on the group posts, the guide Kip wrote
that's in the Coco3FPGA group files has the most current steps for
programming the unit. Brian's guide is good, but outdated. It also
doesn't include programming for the analog boards. Bill Pierce
"Charlie stole the handle, and the train it won't stop going, no way
to slow down!" - Ian Anderson - Jethro Tull My Music from the
Tandy/Radio Shack Color Computer 2 & 3
[2][5]https://sites.google.com/site/dabarnstudio/ Co-Contributor,
Co-Editor for CocoPedia
[3][6]http://www.cocopedia.com/wiki/index.php/Main_Page E-Mail:
[4][7]ooogalapasooo at aol.com -----Original Message----- From: James
Ross To: CoCoList for Color Computer Enthusiasts Sent: Sat, Oct 28,
2017 4:21 pm Subject: Re: [Coco] DE-1 Clarification Please
Interesting Tim. Thanks for the*.sof advice, I did see a blurb about
that in the manual. Wikipedia talks about most flash devices lasting
~ 100,000 cycles - but I've seen other places state as low as 10,000
... Hopefully these DE1's are closer to the 100k! Thanks for your
previous answer on the programming order. I am going to play around
w/ it soon and see if I can confirm your statement that it does not
matter. I have no idea what was making my first 3 or 4 tries fail. I
am fairly certain that the guide at
[5][8]http://www.brianholman.com/retrocompute/files/coco3fpga.html
if followed verbatim does NOT result in a working system.Thanks
again for the info.
James________________________________________From: Coco on behalf of
tim franklinlabs.com Sent: Saturday, October 28, 2017 7:56 PMTo:
CoCoList for Color Computer EnthusiastsSubject: Re: [Coco] DE-1
Clarification Please ...Oh one more thing... Pay close attention on
the number of times you program the flash *POF or ROM). Flash has a
limit on the number of times you can write to it before it dies.
It's write capability is very large but it does have a limit. Use
SOF files if you are experimenting. Most flash cards do whats called
"wear leveling" to increase the write cycles. I'm not sure if the
DE1 flash supports wear leveling. -Tim On October 28, 2017 at 1:58
PM James Ross wrote: 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 on behalf
of tim 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 -- Coco
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