[Coco] altera DE1 board

[Steven Hirsch]

On Tue, 19 Oct 2010, Frank Pittel wrote:


> I needed a coco3 rom so I found the mess roms and picked one of the *.zip files

> for the coco3 and used the de1 console software to write the coco3.rom file to

> flash. I then power cycled the board and reloaded the *fpga*.sof file. With the

> exception of the black screen I get the same results that I got without the coco3

> rom loaded in flash.

>

> Am I doing something wrong, missing a step or two, etc? I think I'm going to try

> using an older fpga file and see if that helps.


I feel your pain.  There were a couple of minor details that are easy to 
miss.  Took me days to get it going.

One major stumbling block:  The numbering of the slide switches and 
momentary buttons is bass-ackwards to my Western sensibilities; running 
from right --> left.  Beyond that, remember that they start from _zero_, 
not one.  The little identifiers on the silkscreening are/were too small 
for me to see with my late-50s eyesight.

I spent days flipping on and off what I thought was SW7.  It was actually 
SW2.  Once the light went on, I was soon off and running.

Check the list archives for a looongggg thread featuring yours truly. 
There may be something valuable to be gleaned.  Or, there may only be the 
impression that I am great at confusing myself :-).

Steve


--