Problem Found

[Tom Droege <tdroege@veriomail.com>]

I am working on the prom code to give Arne the pixels he wants.  I can't 
quite do what was requested.  I am limited in the prom space to 2048 items 
and a skipped pixel counts as 1/4 item.  The present code will skip 16, 
read 2036 (8 covered and 2028 live), skip 16, read 4 overscan.  I will fuss 
with this so that we get all the live pixels.  One thing that would work is 
skip 20, read 2036 (4 covered and 2032 live) skip 12, read 4 overscan.

It is possible to go back to the 31 items in a line which would give space 
to read more pixels.  Since I have change to crystal controlled clocks, I 
can no longer adjust the clock speed so the ADC would be pushed a little 
for time to complete the conversion.  I think there is enough tolerance in 
the design to allow this.

In any case, in working on the code I discovered that I had not changed an 
array when I changed from 31 time slots in a line to 32.  As a result 
unknown things have been happening in the prom code.  It is a wonder that 
it worked at all.  While I have been programming 32 items in a line, only 
31 of them have been written into the prom.

Tom Droege