The promised format

[Tom Droege <tdroege@veriomail.com>]

OK, Herb Johnson has captured my previous note on what I am writing, and 
put it in TN-71.  This is repeated below.  So you don't have to wait until 
tomorrow.

Arne and all,

Well, I can give you a breakdown of where I think the overscan and dark 
pixels are, but it is clearly wrong. I have pretty much followed Arne's 
request, and there are overscan and prescan and covered pixels in the 
format. But I am making an error somewhere. I am not quite looking where I 
think I am looking. It is just one of those things that takes a few days of 
prom burning to straighten out. This is just not the type of thing that is 
on top of my priority list. It is something that I know can be solved.

One of you may get to solve it if you really care.

OK, you may recall that the CCD442A has 16 front end pixels, 8 covered 
pixels, 2032 live pixels, and 8 more covered pixels.

Here is what I am trying to do:

Skip 8
Read 2 pre scan pixels
Skip 8
Read 2 covered pixels
Skip 4
Read 2034 covered pixels
Skip 12
Read 2 over scan pixels

You will note that this adds up to 2040. Yet I am reading 2043 pixels. It 
could be an error in how I code the prom, or it could be an error in the 
BASIC transfer code.

Note from Herb: a number of TASS members have reported that the first 6 
columns and the last 2 or 3 columns of the images on CD #5 are clearly NOT 
imaging columns.

OK, this is where we stand.  I will not turn my attention to writing up 
everything.  Perhaps someone can detect the problem.

Tom Droege